Spark Plugs: Dielectric Grease and Anti-Seize Questions

Never seen a seized plug in a Toyota in 12 years and with the coil on plug design there isn't much need for dielectric grease. Won't hurt anything though if you decide to use them.

SPH-D710 ? 2

 

I don't think the dielectric grease on boot matters much, one way or the other. Regarding anti-sieze compound on the threads, I'm not so sure.

If you look at torque guideline tables, there's usually multiple values given: one for clean threads, and others, invariably lower, for greased threads, depending on what's used. If a torque value is for dry threads, and you liberally oil or grease the threads and then torque them to that value, you are stressing the bolt or sparkplug somewhat more, I'd think.

What do I do? Apply the anti-sieze, but extremely sparingly. Maybe just get some on a cloth, wipe most off, then wrap it around the thread zone and twist it a bit.

 

It comes from the factory without grease. Its not broken, so why do you insist on fixing it with grease?

Grease can melt and go places where you don't want it. Grease can also trap grit and end up grinding away precision fittings.

Unless an application absolutely needs grease, don't use it! Sounds like you have a bit to learn about grease still...

Galaxy Nexus ? 2

 

You should find out what dielectric grease is and what he is thinking about doing with it before you go all expert on us.

 

I agree with you, but done right no harm done. The done right part is don't get any anti-seize on the spark plug electrode or ceramic on the engine end of the plug. The compounds in anti-seize can really mess up the sparking function of the plug.

 

On the subject of anti-seize, see Changing the spark plugs? | PriusChat.

 

maestro8Nouveau Member

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It comes from the factory without grease. Its not broken, so why do you insist on fixing it with grease?

Grease can melt and go places where you don't want it. Grease can also trap grit and end up grinding away precision fittings.

Unless an application absolutely needs grease, don't use it! Sounds like you have a bit to learn about grease still...
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He is not the only one!!!.​

1. You do not fix things with grease - you protect them.​

2. Most anti-seizes are made with bentone grease which as most people know is "non-melt"​

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Ok, tell me what I know and don't know, stranger. Then I'll tell you what's in my garage and how many hundreds of hours I've spent working on them...