Originally Posted by
av8tor1977
I've seen it recommended that you not use anti-seize on spark plugs because it can inhibit heat transfer from the plugs to the head. However, it is standard operating procedure on every full size airplane engine I ever worked on to religiously use anti-seize on the plug threads.
AV8TOR
I was taught in auto shop that dissimilar metals corrode. If you use spark plugs with steel bases in aluminum heads, you
will encounter corroded threads and quite possibly damaged cylinder heads if the plugs aren't changed at normal intervals. I thought for sure I'd have a few damaged plug holes in my hemi's heads because of how hard those plugs were to get out. The new generation of Hemi engines all have aluminum heads. I've not come across any tech bulletins stating not to use antisieze on plugs in these Hemi heads. If they were iron heads, I'd not use antisieze compound as I've never had any trouble getting plugs out of iron heads.