Should you lubricate spark plug threads?

Thread breakage can sometimes involve removing the cylinder head for repair. Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.

Should I put anti-seize on spark plug threads?

Do not add anti-seize to spark plug threads. Adding anti-seize to spark plug threads actually lubricates the threads, causing you to over-tighten the spark plugs. Over-tightening causes the metal shell to distort and break the seal between the shell and the porcelain center. That causes misfires.

Do Bosch spark plugs need anti-seize?

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.


Do modern spark plugs need anti-seize?

The nickel coating on most modern spark plugs provides added protection from seizing in aluminum cylinder heads and has made anti-seize less important in spark plug installations.

Do NGK Spark plugs need anti-seize?

Metal shell stretch changes the heat rating of the spark plug and can result in serious engine damage caused by pre-ignition. Do not use anti-seize or lubricant on NGK spark plugs. It is completely unnecessary and can be detrimental.


Should Anti-Seize Be Applied On Spark Plug Threads?



Is it better to change spark plugs hot or cold?

You'll want to wait at least 30 minutes before installing new spark plugs. That should give the engine adequate time to cool down.

What kind of grease goes on spark plugs?

Dielectric grease is often used to seal the connection between spark plugs and spark plug wires. Dielectric grease, or tune-up grease, is a silicone-based grease that repels moisture and protects electrical connections against corrosion.

How tight should you tighten spark plugs?

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. (Taper seat: About 1/16 turn more.)

Can I use lithium grease on spark plugs?

Since it keeps out the moisture, the conductance of the connector is enhanced, thereby improving the performance. Spark plug cables, threads, and boots made up of rubber are some common applications of these dielectric greases. White Lithium grease is used widely in automobile gears. Aerosol fans also use them.


Can Vaseline be used as dielectric grease?

Dielectric grease is not an electric conductor while anything soaked in petroleum jelly will burn if exposed to heat or an electric current. Also, Vaseline has a very low melting point compared to the dielectric grease which can withstand extreme temperatures.

Will anti-seize cause misfire?

As a final note, most spark plug manufacturers discourage using anti-seize compounds on spark plug threads because metallic-based compounds can spatter onto the insulator tip and cause a misfire. The anti-frictional qualities of an anti-seize compound can also cause the spark plug to be over-tightened.

Can you use too much dielectric grease spark plugs?

While dielectric grease is great for use on electric plugs because it does not conduct electricity and it provides a water-tight seal, too much of it is not very necessary. In fact, if you apply dielectric grease to the extent where it becomes thick and goopy, your vehicle will most likely not start.

Should I use dielectric grease on ignition coils?

It is a preferred grease for automotive ignition applications because ignition systems use rubber boots to keep the spark plugs and spark plug wires away from moisture Silicone dielectric grease is used on the bottom of the inside of the ignition coil boot where the spark plug meets the ignition coil.


Where should you not use anti-seize?

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.

What is the torque setting for spark plugs?

A new or reinstalled plug with a new gasket will require ⅜-⅝ turn to effect a gas tight seal depending on head material.

Does dielectric grease improve connection?

Dielectric grease also protects the terminals from moisture and dirt. You should not apply grease between the terminals since it will prevent a good connection and shorten the battery's useful life. Dielectric grease is ideal for battery terminals since it is not affected by high temperatures.

When should you not use copper anti-seize?

Copper Grade Anti-Seize is copper in color and is not recommended for applications where copper is prohibited. Like Silver Grade, Copper Anti-Seize protects metal parts against rust, corrosion, galling and seizure at temperatures up to 1800° F.


Do Autolite spark plugs need anti-seize?

There is a debate whether or not to use anti-seize when installing spark plugs. The official position of Autolite on this question is to consult the service manual for the vehicle being repaired and use anti-seize only where the original manufacturer recommends it.

Can I use regular grease instead of dielectric?

Silicone grease can be used on all your electrical connections and on battery terminals. They are widely used on spark plug cable rubber boots as well as a sealant for spark plug threads. They also help prevent electrical failures caused by moisture and corrosion.

Is white grease the same as white lithium grease?

The main difference between the two is appearance. WD-40 White Lithium Grease sprays onto your surface white and does not run, which makes it more controlled and less messy than regular lithium grease.
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