always no matter what engine

Another maybe dumb question .........

I've heard/read that there are different types of anti-seize i.e different ingredients, or compounds ?? That true ? If so, what is the correct/best type anti to use on aluminum heads ? And would the same type be used for both spark plugs, and exhaust studs/bolts ?

There are different compounds in some different anti-seize. Best bet is to do a search at the top and go from that, we just went over a lot of these a few months ago.

John S.

I use Permatex. I use the normal (silver) anti-seize on aluminum heads and the copper-based anit-seize on iron heads.

Just had this discussion on another board.

First I am sure we are all aware that The Spark plug has two vital jobs. First one to fire are air fuel mixture. Second, and one that is so over looked, is to absorb heat and transfer it to the head then on to the cooling system.

I used to work for bosch in Broadview IL where they do all the aftermarket spark plug product testing and fitment. We did a little test using these $2000 spark plugs that take all kinds of heat testing. We took a BMW 318 that was one of our training vehicles and ran a little test. I want to see if Anti seize would insolate the plug from the head. We put just a small amount on it and torque it to spec. It lowered the ability for that plug to do its job of removing heat by 35%. Ran the test again in another hole and had near same results

I never had a problem with a SS marine plug getting stuck in a aluminum head. Do what you want.

I would sacrifice heat transfer , for a galled thread anyday

On an engine that is lean the reduced heat transfer could result in a melted piston