Anti-seize on spark plug threads? (Solution)

Anti-seize can act as a lubricant, altering torque values up to 20 percent, increasing the risk of spark plug thread breakage and/or metal shell stretch. Thread breakage can sometimes involve removing the cylinder head for repair. Do not use anti-seize or lubricant on NGK spark plugs.

  • Should you apply anti-seize on spark plug threads? No. Most spark plugs have either a zinc or nickel plating that prevents the threads from seizing in the cylinder head. That’s different from decades ago when spark plugs didn’t have any coating and could seize in the cylinder head, making removal tough. Do not add anti-seize to spark plug threads

Should I use anti-seize on spark plug threads?

AC spark plugs should be installed dry. Do NOT use any type of anti-seize lubricant on spark plug threads. Anti-seize lubricants decrease the amount of friction between the threads, resulting in over-tightening. That can cause the spark plug to move too far into the combustion chamber (in crush washer applications).

Can you put anti-seize on threads?

Do not use anti-seize as a lubricant such as on caliper slide pins or on threads for a bushing press or any mechanical assembly that requires a lubricant. Do not use anti-seize on exposed threads because the compound can attract contaminants that may contribute to thread damage when the fastener is removed.

Should I lubricate spark plug threads?

NGK does not recommend the application of lubricant such as copper grease to spark plug threads as the result is a reduction of frictional forces at the thread faces. It’s very important not to over or under tighten spark plugs during installation. Over tightening can lead to distortion of the spark plug and breakage.

Should I use anti-seize on Bosch spark plugs?

For Landfill applications, anti-seize is highly recommended. Bosch recommends Loctite Heavy Duty Metal Free anti-seize part number 51605. When applying anti-seize, only put a small amount at the base of the spark plug as shown.

Where should you not use anti-seize?

Anti-seize can not be applied on already damaged or cross threaded threads of bolts. The threads need to be chased, re-tapped or repaired before applying anti-seize. Don’t use anti-seize on exposed threads as it may attracts contaminates that may contribute to thread damage.

Do you really need a torque wrench for spark plugs?

Spark plugs should be torqued to manufacturers’ specifications. However, it is possible to tighten the plugs satisfactorily without a torque wrench.

What gap should my spark plugs be?

For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.

How tight should I tighten my spark plugs?

Confirm that the thread reach of the spark plug is the right one for your engine. Remove the dirt at the gasket seal of the cylinder head. Tighten the spark plug finger-tight until the gasket reaches the cylinder head, then tighten about ½ – ⅔ turn more with a spark plug wrench.

Will anti seize cause bolts to loosen?

Anti seize will not loosen bolts.

How long does Anti Seize last?

Anti-Seize Special™ has a shelf life of 5 year or more when stored in a closed container. Shelf life may be much longer depending upon storage location and conditions. Store with container tightly sealed in a cool dry place for optimum shelf life.

Is anti-seize conductive?

Like Silver Grade, Food Grade Anti-Seize protects metal parts against rust, corrosion, galling and seizure at temperatures up to 1800° F. It is electrically conductive and does not compromise the integrity of soft metals.

Can I use grease instead of anti-seize?

You can use grease quite effectively as an anti-seize compound. It’s not as good in high temperature applications, but there aren’t any of those on a bike. However, NEVER use anti- seize compound as a lubricant.

5 Things You Should Know About Spark Plugs

On Monday, January 10, 2022, the estimated delivery date for the United States is: International shipping is expected to arrive today.

How to Change Your Spark Plugs & Why You Shouldn’t Use Copper Grease

We wanted to make things as plain as possible because this is one of the most often asked issues on the Internet when it comes to spark plug adjustments. Even walk-in businesses are attempting to utilize this as a marketing strategy to sell their copper grease products, so we dug further to uncover the reality. So, what exactly is correct and what exactly is incorrect?

The Correct Answer

Almost all spark plugs now have a specific anti-seizure nickel or zinc-chromate shell coating, which is now found on virtually all of them. Plating may be thought of as a substitute for thread compound or copper slip, in a nutshell. Here’s what NGK has to say about it: NGK spark plugs are distinguished by the use of a process known as ‘trivalent plating.’ Corrosion protection against moisture, chemicals, and weather is provided by a silver- or chrome-colored coating applied to the threads. During the removal of the spark plug, the coating also serves as a releasing agent.

The NGK technical support department has received a number of inquiries from installers who have overtightened spark plugs as a result of the usage of anti-seize products.

Why Do Torque Values Change With Copper Slip?

The reason for this is that when thread compound or copper grease is used, there is less friction between the two materials, allowing for significantly greater force to be delivered into the plug’s preload. The preload is the ‘tension’ that exists between the plug and cylinder head threads, which provides the friction force that prevents the plug and cylinder head threads from coming free. By overtightening them by up to 20%, you run the risk of breaking them if you’re putting an anti-seizure medication on the patient.

In Our Experience

It is necessary to return any damaged plugs to NGK for formal examination and documentation in order to maintain our guarantee with them. Customers utilizing thread compound and simply over tightening with a torque-wrench resulted in the breaking of 100% of the spark plugs returned to the manufacturer in the previous three years, according to the latest information available at this time. Each and every one of the NGK warranty reports is meticulously documented with precise images that indicate the exact cause of failure, down to the tiniest of details such as hex swelling.

But I Know a Mechanic Who Always Uses it on Spark Plugs?

If your technician applies copper grease to the threads of your spark plugs while also torqueing them down, you should be on the lookout! The National Geographic Society is certain that this practice should be avoided at all costs.

We must keep in mind that the spark plug makers have the greatest experience of any of us, having spent millions of pounds on research and development and employing hundreds of competent technicians to test their products on a daily basis.

NGK Tech Bulletin

Regarding the issue with copper slide, NGK issued an official technical bulletin to all of its suppliers.

Quick Spark Plug Installation Guide

Identify and remove the spark plug covers by lifting them upwards from their positions. 2. Remove any dirt from the plugs recess region with a compressed air blower and gently remove the old spark plugs with the appropriate sized socket that is specifically built for spark plugs; these sockets are typically considerably longer than conventional sockets. Using an impact wrench at a low torque setting to’shock’ the plugs free is recommended in the event that they appear seized. It is best not to use a penetrating lubricant since, after the plugs are removed, any debris or fluid will be able to enter the cylinders and cause damage.

  • Examine the condition and cleanliness of the cylinder head threads; if they are unclean, this might result in erroneous torque wrench readings; it is critical, however, that no dirt falls into the cylinders; a piece of kitchen roll and a little spraying of carb cleaner should do the work.
  • Double-check that the plug is gapped in accordance with the car manufacturer’s recommendations.
  • The use of copper grease/slip or anti-seize on the plug threads is strictly prohibited; copper grease should only be used on old-fashioned black spark plugs that do not have corrosion-resistant zinc coating.
  • Install new spark plugs and tighten them with your fingers until they stop sparking – A length of rubber tubing that is put over the insulator is a valuable assistance for plug placement in difficult-to-reach locations.
  • Make certain that your torque wrench has the appropriate load ranges and that it is calibrated; the torque settings for spark plugs are rather low, therefore a smaller wrench will be required.
  • This will cause the torque measurements to be erroneous, and it is possible that over tightening will occur by up to 20%!
  • Too much torque on the spark plug might result in deformation and eventual fracture.
  • 6.

8. Start the engine and enjoy the beautiful symphony that is playing!

Should You use Spark Plug Anti Seize Lubricants to Peak Torque Rpm

When it comes time to replace your old spark plugs with new ones, anti-seize removal is essential. Instead, anti-seize lubricants are used on spark plugs to make disassembling easier by allowing nuts and screws to be removed quickly and with little effort. The application of anti-seize for the protection of spark plugs and the components around them may be done in a safe manner. Instructions for applying anti-seize on spark plugs are included with the vehicles of either of the categories of manufacturers, automotive or aviation.

As a result, we will explore the many types of anti-seize, their necessity, preventions, and alternatives today based on our own personal experiences.

What is anti-seize on spark plugs?

In order to remove spark plugs from the socket, anti-seize lubricants are applied to them. Anti-seize acts as a lubricant, allowing the plugs to loosen up and be readily pulled out of the socket with ease. Some spark plug manufacturers, such as NGK and Bosch, already include a coat of anti-seize on their spark plugs, eliminating the need to isolate the spark plugs from the rest of the ignition system. Additionally, using too much anti-seize may be damaging to the spark plugs, which is something that the manufacturers are already aware of.

Spark plug anti-seize compound:

When used properly, spark plug anti-seize compound will provide the necessary lubrication; however, using too much will cause the plug to over-torque. As a result, while DYing with anti-seize chemicals, you run the risk of distorting the plugs, which might result in engine misfire, spark plug thread damage, combustion gas leakage, and other problems. That is why current spark plugs have anti-seize, which helps to decrease or eliminate the possibility of the plugs self-seizing. NGK, ACDelco, Autolite, and Bosch are among the companies that make spark plugs that have an anti-seize ingredient.

What is spark plug grease:

Anti-seize grease, often known as spark plug grease, is a semi-solid kind of lubricant that is used to lubricate spark plugs. It performs a similar function as anti-seize in terms of loosening the instruments. However, due to the high viscosity of grease, the frictional properties of the greased tools are quite high. Additionally, by greasing the tools, water or moisture is retained, ensuring that rust or corrosion do not affect the plugs. Greasing a spark plug is a one-time task since the density of the grease lasts for a long time.

Spark plug grease necessary:

Greasing the spark plug is an optional maintenance procedure that is not always performed. Some forms of plating such as onyx or nickel-chrome are now applied to the exterior of spark plugs to prevent them from corroding before they reach their full maturity. Additionally, occasionally DIY projects result in over-greasing, which might have the opposite effect of what you intended. For example, the roller threads may become less frictional, particular bolts and screws may be accidentally opened, and there are several more possibilities.

What is copper grease?

Copper grease is a word that is extensively used in the automobile industry to refer to an anti-seize compound that is made from copper. This product is manufactured from a mixture of corrosion inhibitors and fine copper particles, which are combined in the manufacturing process by combining oil and soap.

As a result, the viscosity of the copper grease is significantly higher than that of a conventional anti-seize component. As a result, the grease adheres to and remains on the material for a longer period of time, thereby avoiding seizure and corrosion.

Dielectric grease on spark plugs

Dielectric grease, which is based on silicone, is one of the forms of spark plug grease available. It signifies that the dielectric one has a higher viscosity and a more sticky texture than the other. In this case, dielectric grease is primarily employed as a connection between spark plugs and their associated wires. The term ‘tune-up grease’ refers to dielectric grease that has a high water repellency and provides a protective barrier against rust and corrosion for the ignition system’s spark plugs.

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Substitute for dielectric grease

Vaseline is a near alternative for dielectric grease that is both inexpensive and effective. But you should proceed with caution since it includes petroleum and has a number of disadvantages, not the least of which is that petroleum may leave distillates on metallic instruments. Aside from that, gasoline is flammable and may quickly degrade the rubbers in the spark plugs. Despite the fact that Vaseline is a readily accessible replacement, it should be avoided while working on automobile components.

Brake grease vs. anti-seize: All you need to know

The anti-seize compound has a small amount of grease carrier as well as high solid content, which lubricates and maintains its effectiveness for a long period of time. Because of these ingredients, it has excellent heat resistance and can be used in even the most extreme temperatures. Additionally, anti-seize is excellent for applications involving high-pressure motions and high-contact. Brake grease, on the other hand, is the polar opposite of anti-seize. The material is unable to tolerate extreme heat, which is higher than 400 degrees Fahrenheit.

Also of note is the fact that brake grease has low contact applications and low-pressure motions.

6 FACTS TO KNOW ABOUT SPARK PLUGS-Your engine relies on spark plugs every day



Anti-seize lubricants are used on spark plugs to minimize the torque value of the plugs and to prevent corrosion in certain parts of the plug. However, if anti-seize is not used properly, it has a number of negative side effects, including thread breakage, cylinder head erosion, over-tightening of spark plugs, and engine damage, which might be the most serious. As a result, new spark plugs are already pre-protected and lubricated, removing the need for consumers to apply anti-seize on their own.

2.Spark plug torque

In the context of a spark plug, torque is the ability of the plug to operate by dispersing heat at a given torque demand. Within each brand, the requirements are varied. Under-torque can result in spark plug or engine damage, while over-torque can result in gas leakage, pre-ignition, and other problems.

3. Oil on spark plug threads

One of the indicators of a faulty spark plug thread is the presence of oil on the threads of the spark plug.

Oil fouling occurs when the O-ring valve tube seal fails and allows oil to flow into the valve tube. Except if you fail to repair the leaking tubes or the complete spark plug set, it will not cause much of an issue in the long run.

4. Spark plug thread size

In the measurement of spark plug threads, there are two types of measurements: diameters and pitches. Unfortunately, the thread size is not universal, and you will need to determine the appropriate size based on the specifications of your car.

5. Gapping fine-wire spark plugs

A delicate issue, gapping the fine-wire spark plugs is a delicate one, since over-gapping results in the spark plug being worthless. Furthermore, using too much pressure while gapping the electrodes might cause them to crack or damage. To avoid this, get a pre-gapped spark plug set in accordance with the manufacturer’s guidelines for your car.

6. Corona stain

Corona stains accumulate on spark plugs over time as a result of the high-voltage going through them. This causes the spark plugs to gather oil and dirt around the insulator and metal shell, which causes them to become dark brown in color. Corona stain is a naturally occurring material, and as such, it should not be seen as a major source of worry.

How to gap spark plugs without a tool?

A good gapping tool is required for properly gapping spark plugs to the specified gap size for your vehicle. Because they are delicate, they have a proclivity to bending and denting quickly. You can only DIY the gaps if you have expert understanding of the subject matter and do not have access to a professional instrument. You can make use of a coin, which is readily available in every household. Bend the electrode of the spark plug with precision, ensuring that the progressive slope is maintained.

It should be noted that this procedure is only suitable for copper spark plugs and not for iridium spark plugs, since the coin’s metal complex may cause harm to the latter.

Should I use anti-seize on spark plugs

Anti-seize is not recommended by modern spark plug manufacturers since it can cause significant engine difficulties if not applied in the right location and amount. The use of anti-seize compounds is strongly discouraged by well-known spark plug companies such as NGK, Bosch, Autolite, and ACDelco. These brands also include protective and lubricative substances on their plugs.

How to use anti-seize on spark plugs

When employing anti-seize, make sure to follow the aircraft’s operating procedures and to use it sparingly. Apply a little layer of it to the centre of roller threads using your fingers or an airbus, being careful not to get any on the electrodes. Small amounts of seizing go a long way, so be careful not to misuse it or overtighten the plugs, which are easily overtightened due to the high degree of lubrication in the plugs. If your spark plugs are made of stainless steel, you should always use anti-seize that is based on aluminum or nickel.

The best anti seize for spark plugs

Anti-seize should be used with caution and in accordance with aviation requirements. Utilizing the tips of your fingers or an airbus, apply a tiny coating to the centre of the roller threads while avoiding the electrodes.

Make sure you don’t misuse or overtighten the plugs since highly lubricated plugs are easy to overtighten due to the fact that they are highly greased. If your spark plugs are made of stainless steel, you should always use anti-seize that is aluminum or nickel-based.

Anti-seize on spark plugs or not: How to understand

Modern spark plug manufacturers do not recommend that spark plugs be treated with anti-seize agents. For the simple reason that customers frequently overuse them, which results in engine difficulties such as misfiring and damage. As a result, the makers devised the concept of pre-seizing their spark plugs.

Anti-seize on copper spark plugs:

Anti-seize compounds contain electric conductive components, which react with the highly conductive copper material and cause the engine to misfire by a multiplier effect when they come into touch with the copper substance. When even a little amount of additional anti-seize is used, the cylinder head and galling will be damaged as a result of over-torquing.

anti-seize copper vs. aluminum: Let’s have a short review

Copper anti-seize provides outstanding anti-seize qualities as well as high-temperature resistance, making it a great choice. It is used in battery terminals to guard against corrosion and to establish a tight seal around the components that are attached to the battery. Copper anti-seize is the only substance that can prevent disk brake sequels. Instead, aluminum anti-seize has great heat resistance and is non-reactive to stainless steel, in contrast to copper anti-seize, which is reactive to stainless steel.

Anti-seize on silver spark plugs:

Silver spark plugs are already engineered to resist corrosion, chemical buildup, and moisture absorption due to their moisture-wicking qualities. They already include a natural releasing agent, which also serves as a lubricant, which makes them an excellent choice. As a result, silver spark plugs do not require anti-seize treatment.

Spark plug material

Due to its high heat conductivity, copper is the most often utilized type of material in spark plugs. This means that spark plugs heat up quickly and cool down quickly, making them ideal for high-performance engines. Copper spark plugs provide the finest performance because they ignite the fuel-air combination immediately and allow the engine to be started promptly. Copper plugs, on the other hand, have a poor overall life expectancy. As a result, they require greater maintenance and replacement on a regular basis.

  1. Yes, they are that durable that they can maintain their sharp edge for a longer period of time when compared to a standard spark plug.
  2. Their thermal conductivity, on the other hand, is poor.
  3. They ignite quickly and start the engine quickly, as well as providing smooth acceleration and idle for your vehicle.
  4. Double platinum spark plugs are distinguished from single platinum spark plugs only by the presence of an additional electrode.

They have a longer than average lifespan, but their performance is not as impressive as it may be given their age. In the waste ignition systems of spark distributors, double platinum spark plugs are the most often utilized type of spark plug.

Spark plug grease substitute

Motorcycle and automotive wire connections are frequently lubricated with Vaseline, white lithium grease, and dielectric grease, among other substances.

Is dielectric grease necessary for spark plugs?

First and foremost, do not tighten spark plugs while they are being installed. Maintain the porcelain and terminals of the front section with a thin layerof dielectric grease as a preventative maintenance measure. This includes the spark plug wires, which should also be protected. It is also known as tune-upgrease since it is made of silicone and repels moisture while also protecting electrical connections from corrosion. It is recommended that you lubricate the spark plug boot with dielectric grease if your engine is equipped with the more recent COP system (coil-on-plug).

lithium grease on spark plugs

It is possible to use white lithium grease. Furthermore, because lithium grease is derived from petroleum, it should not be used near plastics or rubber, as it will cause these materials to break prematurely.

Copper vs. iridium – copper vs. platinum spark plugs

Overall, when comparing copper spark plugs to iridium and platinum spark plugs, it is discovered that copper has a high heat conductivity, resulting in the spark plugs acting more quickly. When compared to copper spark plugs, the performance of platinum and iridium spark plugs is a little slower. Copper alloys, on the other hand, have the shortest life span, whereas platinum has a longer life span and iridium has the highest life span due to their self-maintenance and outstanding anti-wear features.

Iridium spark plugs vs. copper

Copper spark plugs are the most prevalent, and as a result, they are less expensive than iridium spark plugs. Additionally, because of its long-lasting construction and self-maintenance characteristics, iridium spark plugs outlast copper spark plugs by a factor of seven. This implies that copper spark plugs will need to be replaced more frequently and will require more maintenance. However, because iridium plugs are less heat-conductive than copper plugs, their performance is slower than that of copper plugs, but they improve the overall performance of the engine.

How long do copper spark plugs last?

When compared to other materials for spark plugs, copper plugs have the shortest lifetime. The fundamental reason for this is their construction, which is not tensile. Furthermore, if they are not properly maintained, they have a significant likelihood of clogging and overheating quickly. As a result, they have a maximum lifespan of 20,000 miles, which is around 1.5-2 years, depending on how far you go.

Spark plug anti-seize for aluminum heads:

The subject of whether or not to apply Anti-seize on aluminum heads remains a contentious one. As a general rule, anti-seize is only intended to be used on the threads of spark plug rollers. Because they contain different metallic compounds and can corrode, aluminum heads should be avoided when applying seize to a metal surface.

How to apply anti seize to spark plugs:

Starting with the second roller thread, you should apply a small dab of anti-seize to the spark plug gasket surface and work your way up.

Make every effort to stay away from the first thread of the spark plug. It is also important not to over-apply the seize, since this will have unintended repercussions.

where to put anti-seize on spark plugs:

Using only a small layer of anti-seize on the roller thread of the spark plugs, then starting from the second strand of thread and working your way down to the gasket surface

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About spark plug threads:

The threads of the spark plug screw down into the cylinder head. They are available in a variety of sizes that correspond to the size of the cylinder into which they must be screwed. Generally speaking, the first value is referred to as thread pitch, while the second number is referred to as thread diameter.

Harley Davidson spark plug gap chart:

The gap chart for Harley Davidson spark plugs is shown here, and it can be readily cross-referenced with the gap charts for some of the more well-known spark plug manufacturers. If you have previously utilized the brands mentioned, you will have an easier time determining the HD spark plug gap. Resources: ARTICLE(S) ABOUT SPARK PLUGS-

  • For the 5.4 Triton, a spark plug is required
  • How to detect if a spark plug is defective just by looking at it
  • How does one go about preventing faulty spark plugs? The sound of a bad spark plug
  • Symptoms of faulty spark plug wires include: What happens when a spark plug fails to function properly
  • Symptoms of a bad spark plug on a motorbike
  • Spark plugs for the 5.3 Vortec engine. What the appearance of a faulty spark plug is
  • What temperature range should I use for my spark plug? Learn how to read spark plugs for tuning purposes. SPARK PLUG WITH ANTI-SEIZE TECHNOLOGY


It is not mandatory to use anti-seize with spark plugs, since certain brands of spark plug already have anti-seize applied to them, saving consumers the time and effort of applying anti-seize to their own spark plugs. This is due to the fact that applying anti-seize without expertise might cause damage to the engine.

Do ngk spark plugs come pre gapped/are ngk spark plugs pre gapped?

The NGK spark plugs are pre-gapped, although they may need to be customized in specific circumstances. You should take good care of the plugs so that they do not become dented, as this will help to prevent mis-gapping. Make sure the spacing is raised or lowered by 0.008 inches from the pre-gapped point in order to get the desired modification.

Are ngk spark plugs good?

NGK spark plugs are among the most reliable spark plug brands available on the market. Their durability, high heat tampering, and trivalent coating distinguish them from the rest of the competition. Chrome or silver plating is always utilized on their roller threads to keep moisture and rust at bay, as well as to make removal simple and without the need for a breaker. Dencan Brain BOIDAR refers to himself as a Torque master, and he is correct. It has always piqued my interest when it comes to automobiles and tool accessories.

I’ve lately launched a blog dedicated to welding equipment.

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Trouble Shooter

Your article on anti-seize lubricant and spark plugs was very poignant. I’ve been working on automobiles for a very long time—so long that I can recall the locations of ignition points, hand chokes, and vacuum wipers. Before I first began out, I was instructed by several older men to always apply a drop of antiseize when inserting new spark plugs. I followed their advice. Now, I happen to be one of those elderly guys, which gets me to my point of contention. Before I replaced the spark plugs in my daughter’s 2010 Honda Pilot, I read over the manufacturer service handbook for the vehicle in question.

  1. The directions weren’t all that out of the ordinary.
  2. It also suggested applying a dab of antiseize to each plug before installing them and tightening them to 13 ft.-lbs.
  3. After reading the logic in your editorial, I’m more likely to forego the antiseize treatment altogether.
  4. Paul Pflaumer of Yardley, Pennsylvania The column you allude to received a good deal of comment, which was exactly what I had hoped for.
  5. It is likely that it began when aluminum cylinder heads first appeared in mass-produced automobiles.
  6. I’m willing to bet that if you go to your local auto parts store, you’ll discover antiseize items that are expressly branded for this reason.
  7. Here’s what I discovered: Using a tiny quantity of anti-seize compound on the plug threads, screw the plugs into the cylinder head until they are finger-tight (see illustration).

In light of the fact that I was previously unaware of any car manufacturers suggesting the use of antiseize lubricant on spark plugs, I decided to find out what the manufacturer of my particular vehicle, a 2007 Subaru Legacy, suggested.

Please keep in mind that the tightening torque specified above should only be used on fresh spark plugs that do not have any oil on their threads.

This set of instructions does not clearly state whether or not antiseize thread lubricant should be used; nevertheless, it does admit that doing so will have an impact on the ultimate torque applied when the plugs are tightened (see Figure 1).

This appears to be solid advice.

For this project, I chose to look at the factory service information recommendations for a diverse range of automobiles from a variety of various manufacturers.

What I discovered, starting with a Chevy Cobalt, will be summarized as follows: Caution: Do not use antiseize compound to coat the threads of spark plugs.

Install the spark plugs in the ignition system.

Tighten the plugs to a torque of 20Nm (15 ft.-lbs.).

There is one maker who is in favor of its usage, another who appears to believe that either method is fine as long as caution is exercised, and a third who does not want it to be used.

They made no recommendations for or against the usage of the product.

Following that, I began to look into the suggestions of the spark plug manufacturers.

I was wrong.

In order to function as a ‘lubricant,’ nickel, zinc-chromate, or other proprietary plating methods are employed.

In fact, they’ve dedicated an entire technical service bulletin to explaining why it’s a lousy idea in the first place.

This causes the threads of the spark plugs to become stretched and fatigued, increasing the likelihood that the plug may break during installation or, in rare situations, during removal.

In order to avoid both corrosion and seizure to the cylinder head, all NGK Spark Plugs are made with a specific trivalent zinc-chromate shell plating.

According to Autolite, the use of any antiseize agents during the installation of spark plugs is not recommended.

In the event that antiseize substances come into touch with the core nose of the plugs, it may result in a misfire problem.

This can result in thread deformation and thread galling, which can lead to cylinder head damage as a result.

Upon additional investigation, I discovered Autolite information that appeared to be in direct conflict with their suggestions.

The instructions are available on the company’s website.

Here’s an excerpt from Autolite’s installation instructions for these exact plugs once more: When installing new plugs, a thin-film coating of high-temperature nickel antiseize should be applied to the ground electrode shield to prevent corrosion.

Spark plugs should be tightened to 25 ft.-lbs.

In the end, it all boils down to determining what information is available and then determining how much weight to assign to each piece of information.

If this is not the case, follow the recommendations of the spark plug manufacturer. In addition, if you do decide to apply anti-seize on the Pilot’s new spark plugs, keep in mind that more is not necessarily better in this case. Obtain a PDF version of this document.

Do Spark Plugs Need Anti-Seize?

When examining spark plugs, there are a few things you’ll want to look for that you may not have noticed. It is possible that the electrode has become worn out; you may notice that it is rounder rather than flat. You want to verify the spacing between the plugs with a straightforward instrument. For my automobile, the required space is 1.1 mm; you can find this information in your owner’s handbook if you have one. You’ll want to search for oil fouling or carbon deposits around the spark plug tip when doing this inspection.

It is critical that the plugs are replaced with those that are recommended by the manufacturer.

The NGK plugs contain a zinc shell coating that is intended to prevent seizing of the cylinder head as well as corrosion of the plugs’ metal components.

Cheaper plugs with a darker or dull look are less likely to have a particular plating, and it is thus suggested to apply anti-seize while using these types of plugs.

Anti-Seize: Apply On Spark Plug Threads?

The use of anti-seize without lowering the necessary torque value might result in thread stripping. Autolite has provided sponsorship for this film.

  • Let’s put an end to this argument! Anti-seize on spark plug threads or no anti-seize on spark plug threads?
  • So, what exactly is anti-seize? It is usual practice to apply anti-seize compound to fasteners in order to prevent the threads from being galled or damaged, especially when two different metals are in contact. For those who live in areas where corrosion is a constant problem, anti-seize is a vital item to have on hand, as it helps to avoid thread damage and contamination as a result of corrosion.
  • What’s the harm in trying? Every time you do so, you will see a reduction in torque values of 25 percent to 30 percent.

What’s the harm in experimenting? When you do this, you will see a reduction in torque levels of 25 to 30 percent.

  • Overtightening can also deform the spark plug shell, resulting in a leak that allows blow by to flow through the gasket seal between the shell and the insulator
  • This is known as blow by. In today’s higher voltage ignition systems, anti-seize can also have an adverse effect on the spark plug’s capacity to ground itself. Almost all spark plugs now have a specific anti-seizure nickel or zinc-chromate shell coating, which is now found on virtually all of them. The plating, in its most basic form, can be thought of as a substitute for thread compound or copper slip. Using it when installing new spark plugs is not recommended by the majority of spark plug manufacturers. When it comes to replacing spark plugs, the majority of automotive manufacturers make no mention of applying it to the plugs. Cleaning the threads of the head and installing it dry is the final tip. Autolite has provided sponsorship for this film.

Why you should never use anti-seize on spark plugs

Don’t try to reason with him; he is immune. In any case, the primary reason that many individuals get seized plugs (and maybe even damaged threads) is that they leave plugs in for an extended period of time (80,000 to 100,000 miles). I change my spark plugs every 30,000 miles and have had no problems with them so far. These plugs aren’t costly, and they make a significant enough difference in efficiency to be worth it to replace them. I’ve successfully removed spark plugs from R50 VG33s with 150k and 250k miles on them (as indicated by the entire electrode being burnt away) without incident, so that hypothesis is out the window.

Perhaps this is due to the lack of anti-seize being used?

Who is responsible for it?

What about spraying it on?

Due to the fact that you are clearly more knowledgeable and began this post, please see to it that the particular solution is provided for all of our members to benefit from. If you don’t answer the question or provide the facts, I’ll lock and hide the topic since it smells like bullcrap. B

Anti-seize on spark plug threads

Date of joining: September 11, 2019 Messages:870 Domenick is the name of the character on the screen. In the aviation industry, we are advised to constantly put anti-seize on our spark plugs to prevent them from seizing. I’ve done that for years and always torque to the suggested number. In the car industry, this is not the case. It appears that the general agreement is that anti-seize should not be used on spark plugs. According to reports, new car plugs have an anti-seize coating applied to them.

See also:  How long can you drive on a spare tire? (Question)

What does ‘trivalent plating’ refer to in terms of the threads of Tempest and Champion aircraft spark plugs?

Dow Corning DC-4 should not be lubricated.


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom-D is his given name. Things to do with Spark Plugs and their components. Remove the old antiseize from the threads before applying the fresh antiseize. When the plug is inserted, flip the gasket over (on both the cylinder and the plug). Additionally, a torque wrench should always be used. (about 25 lb)


Date of joining: January 21, 2019 Messages:81 Except for Rotax 912 series motors, Jeremy’s new interest is in a variety of other things. Use Rotax heat conducting compound () and torque to the manufacturer’s specifications. Remember that automobile plugs are typically changed after 100,000 miles, but aircraft plugs are removed and replaced for compression tests once a year or after 100 hours of flight time. There is no plating on mine.


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom-D is his given name. This varies widely depending on how many times the plugs are blasted; but, after around 500 hours, the gaps will grow to the point where they must be replaced. I have seen the engine run for over 1000 hours on occasion, but it is a rare occurrence.

GRG55Final ApproachGone West

Date of joining: December 29, 2015 Messages:9,307 Aztec Flyer is the name of the display. For those of you that own a Lycoming, the instructions are rather explicit. Item 3 on page 2 of Service Instruction No. 1042AH, ‘Spark Plug Installation Guidelines,’ is referred to as ‘Spark Plug Installation Guidelines.’ When I asked a Lycoming representative whether exact copper-based compound anti-seize compound was used in the plant, he said that only Loctite C5-A was used. Approved Spark Plugs.pdf (Approved Spark Plugs.pdf) Is it possible that you do not have an inch-pound torque wrench?


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom-Dyes is my screen name, and I am capable of multiplying and dividing.


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom-D is his given name.

GRG55Final ApproachGone West

Date of joining: December 29, 2015 Messages:9,307 Aztec Flyer is the name of the display.

Tom, I’m not going to disagree with Lycoming on this point. Even more, I will not engage in a debate with you. Please see Post Number 6 in this topic for further information. Is there a reason you believe there is a difference? Here’s a hint: it has nothing to do with arithmetic.


Tom-DTaxi to Parking

On December 29, 2015, I became a member. Messages:9,307 Flyer with the inscription ‘Aztec’ There will be no disagreement with Lycoming, Tom. And to make matters worse, I will not engage in debate with you. Please see Post #6 in this forum for further information. Which of the following do you believe is the cause of the disparity: Here’s a hint: it has nothing to do with mathematics.

Dan ThomasFinal Approach

Date of joining:June 16, 2008 Messages:8,188 Dan Thomas is the persona displayed on this page. And we elderly people do the same thing in our brains all the time.

Dan ThomasFinal Approach

Date of joining:June 16, 2008 Messages:8,188 Dan Thomas is the persona displayed on this page. So, what is it, exactly? You’re telling us that 300 inch-pounds is not the same as 25 foot-pounds, aren’t you. Is this the ‘new math’ that students are being taught these days? What about 330 pounds in weight? What makes you believe that the ft-lb wrench is so accurate? And what is the difference between the torque levels for wet and dry conditions? It would be wet if it had anti-seize, wouldn’t it?


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom’s display name is Tom- When some people are concerned over a couple of foot pounds of torque, it’s amusing to consider that 90 percent of torque wrenches are never calibrated. Alternatively, they may be concerned about the quality of the instruments they employ. Nonetheless, there are people who are anal retentive in nature. According to my Lycoming handbook, the threads of each spark plug should be treated with C5-A copper-based anti-seize or engine oil.

Dan ThomasFinal Approach

Date of joining:June 16, 2008 Messages:8,188 Dan Thomas is the persona displayed on this page. Continental and Lycoming will define sparkplug torques dependent on the presence of the anti-seize they provide in their sparkplug specifications. Torque wrenches must be calibrated at least once a year. Shops must get these done as frequently as necessary in order to maintain them correct. It will be necessary to calibrate a particular wrench much more frequently if it is used many times each day in a shop.

  • Calibration is carried out using equipment that has been calibrated and traceable to a national standard, and it is carried out by qualified personnel.
  • The wrench is then tested at various settings, with the actual test numbers recorded in both the left- and right-hand directions.
  • Wrenches that are too cheap are like this.
  • The weight of 330 inch-pounds is just 27.5 foot-pounds.
  • If the calibration chart for my wrench reveals that it is torquing one foot-pound too low at that setting, I simply adjust it to 28.5 ft-lbs.

This isn’t a difficult problem to solve. And, for the most majority of fasteners, a range is specified, which effectively eliminates the need for adjustment.pdfProbably correct. lol


Tom-DTaxi to Parking

16th of June, 2008 was my first day at school. Messages:8,188 DANIEL THOMAS’S OWN NAME Specifications for spark plug torques will be determined by the presence or absence of anti-seize stated by Continental and Lycoming, as well as other factors. Annual calibration of torque wrenches is required. Having them done on a regular basis is necessary to ensure that they are always correct. It will be necessary to calibrate a certain wrench much more frequently if it is used many times each day in a shop.

  • Technicians are trained to perform calibration on equipment that has been calibrated and traceable to a national standard.
  • The wrench is then tested at various settings, with the actual test numbers recorded in both the left- and right-hand directions, and the chart is created.
  • The same is true with low-cost wrenches.
  • 330 inch-pounds is just 27.5 foot-pounds, therefore 330 inch-pounds is a very little amount of weight.
  • If the calibration chart for my wrench reveals that it is torquing one foot-pound too low at that setting, I simply change it to 28.5 ft-lbs lower.
  • And, for the most majority of fasteners, a range is specified, which effectively eliminates the need for adjustment.pdfAlmost certainly accurate.

Dan ThomasFinal Approach

Date of joining:June 16, 2008 Messages:8,188 Dan Thomas is the persona displayed on this page. Yup. The debate was about whether to use dry or greased threads. Do you believe that the manufacturers will publish a torque specification for dry sparkplug threads, given that they have specified anti-seize on the sparkplugs? Assume that the plugs were simply tightened snugly by hand. It’s not clear what dreadful event is intended to occur.


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom-D is his given name. To clarify, the question is if it makes a difference whatever product is utilized. Nickel has a greater melting point and hence provides superior protection. I’ll bet you can’t tell the difference in torque between the two goods by looking at them.

Cap’n JackFinal ApproachPoA Supporter

Date of joining:June 25, 2006 Messages:8,248 Location:Nebraska Captain Jack is the character’s display name. If the manufacturer specifies that copper should be used, I will continue to do so.

red4golfLine Up and Wait

Date of joining: September 29, 2012 Messages:548 Yelm, Washington is the location. Red4Golf is the name of the game. My first job as a tech was many years ago at a company that manufactured items that we periodically placed on submersibles and occasionally on Navy submarines. Everything had to be certified as ‘sub safe,’ and we didn’t have the same kind of debates about foot vs inch pounds, calibration timelines, inspection procedures, regulatory adherence, and so on that we see on POA.

We also didn’t have the same kind of debates about foot vs inch pounds, foot vs inch pounds, foot vs inch pounds, foot vs inch pounds, foot vs inch pounds, foot vs inch pounds, foot vs inch pounds, Despite the fact that I adore this area, DAMN!

Dan ThomasFinal Approach

Date of joining:June 16, 2008 Messages:8,188 Dan Thomas is the persona displayed on this page.

red4golfLine Up and Wait

Date of joining: September 29, 2012 Messages:548 Yelm, Washington is the location. Red4Golf is the name of the game. I get what you’re saying, but here’s my theory. When the rules are set out in black and white, I am more likely to adhere to them. As a student studying electrical engineering, there were moments when I was expected to comprehend the laws and make things happen within the confines of the rules given out by physics, electrical theory, or government legislation, among other things.

  1. Isn’t that the way things operate here?
  2. As long as you fulfill or surpass the minimum requirements.
  3. Either copper-based anti-seize or ENGINE OIL should be used.
  4. Make a plan to meet up with someone.
  5. Lycoming specifies a maximum torque of 35 ft-lb.


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom’s display name is Tom- Unless you resort to penalties. My Autolite penalties seldom require re-gapping since point erosion at 1300 hours is virtually non-existent. Simply using a dental pick, I removed all of the trash. In addition, they are less expensive over time. Hello, Tom. I hope everything is going well for you, friend.

DomenickLine Up and Wait

Date of joining: September 11, 2019 Messages:870 Domenick is the name of the character on the screen. I used to own a 1992 Nissan 240SX, which I sold recently. In the process of replacing the spark plugs, I did not twist them. This was back when I didn’t have an airplane or a good torque wrench—although I did have a torsion bar torque wrench at the time. When I got to work, I parked my car in the underground parking garage of the building where I worked. In the middle of the night, I heard a rhythmic psst-pst-psst, and I was wondering what the hell was going on.

A pimple formed on the inside of the hood.

When I opened the newly tailored hood, I discovered one of the spark plugs, which was sitting free with the plug wire still attached, above the engine.

GRG55Final ApproachGone West

Date of joining: December 29, 2015 Messages:9,307 Aztec Flyer is the name of the display. Is it possible that you just forgot to torque them, or that you were unaware that you were required to torque them?


Tom-DTaxi to Parking

Date of joining: February 23, 2005 Messages:34,736 Tom-D is his given name.

Dan ThomasFinal Approach

Date of joining:June 16, 2008 Messages:8,188 Dan Thomas is the persona displayed on this page. Much of the debate in this area is between pilots/owners who want to know everything and mechanics who really know what they’re talking about. Some business owners will be critical of the industry’s standard operating procedures. Some mechanics will have disagreements with one another about things they’ve ‘always done that way,’ as the saying goes. Some mechanics will continue to use techniques that have been rendered outdated by service bulletins, service letters, or maintenance manual modifications that have been in effect for a long period.

There is a lot of leeway in a number of areas.

It is a rare occurrence, but it does occur.

It is significantly more probable that they will overtighten 1/4′ bolts and nuts if they do not use a tool, and the bolts will break.

In an 182RG, I had to gently remove a damaged AN4 bolt from the retract actuators, which required extreme caution.

The airframe is designed to accommodate it.

It goes somewhat like this: I completed my PPL in a few hours of study and flying, for a total of about 100 hours.

The IFR and Instructor ratings took a long time to obtain as well.

It took me four years (7200 hours minimum) of apprenticeship and the equivalent of two years of study to earn my Aircraft Maintenance Engineer certificate (Canadian A P-IA).

However, an AME ticket is only available to those who are 21 or older.

Aviation may be extremely rewarding, but it can also be quite punishing. When it comes to aviation, there is no room for sloppiness, whether during flight or maintenance. It will take your life.

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