WTF is rite! Just use it! It will do more good than harm.

 

To be honest I have always used Wurth copper anti-seize on my cars up to now. My thought at the time is that the copper would help conductivity between the plug ground and the head. But there is a growing number who recommend against anti-seize. Hence I asked the question.

From what I have seen there is no universal answer and to date I have yet to see a manufacture state that anti-seize shall be used when installing plugs. Mitsubishi is no exception. In fact I have never found anti-seize remains on any stock plugs without regard to the manufacture.

Where did I say that I had a P0300 from a plug install issue or for that matter a misfire problem?

Denso's catalog states reduction in torque by 50% when threads are lubricated or 9 ft-lbs for the Evo. This seems really low - thus I asked what people are torquing their plugs to with anti-seize.

 

1st off, I never directed the P0300 statement to you or anyone for that matter. You did reference it, but so did other people. whipdy-do. I was mearly asking a question of "how do you know if you received a P0300 code". Then I stated my findings.

As far as reducing torque by 50%????????????? Dont believe everything you read. If you do such, be certain to have the necessary tools to replace the spark plug that pop's out! Probably not possible since the plug should be captured by the coil. You'll just wobble / enlarge the plug hole / threads, then rat-f##k yourself the next time you replace the plugs & blame on the copperslip because of improper torque! Never the less, just torque it up to the bottom-side factory specs. We apply compound everytime we remove plugs for borescoping, leak-down, plug test, etc. I can tell you we havent had a thread related issue. The primary reason for applying sauce in the 1st place.

If you ever had a plug seize in a aluminum head before, you will religously apply some type of compound. For those who havent, are most likely skeptics.

 

FYI,

Denso replied with the following recommondation,

I do not recommend anti-seize on the plugs. It does not allow for the heat to dissipate correctly. Please do not use anti-seize.

 

Then you should spray break clean on the threads of your spark plugs & the spark plug threads within your cylinder head to eliminate any possibility not achieiving the correct heat dissipation! J/K

Good luck with your decision.

 

wow, WOT does not like you!
that's galling isn't it

 

Think about that for a minute. The anti-seize also increases the surface area contact of the plug to the head, thus allowing better heat transfer. Anyone who has built computers for a hobby knows what I'm talking about.

Use the copper anti-seize others have mentioned. (heck, I didn't even know copper anti-seize existed. Where do you get that?)

The key is to use a really small amount.

 

I consider the Denso recommondation as silly. The copper particles that fill the void in the threads can only help to increase heat transfer between the plug and head.

Wurth CU-800 Copper Anti-Seize