I don't recall ever seeing that plate and I don't know what it's for. I resealed a lot of valve covers in my first couple of years at the dealership starting in 1990 and I don't believe I ever saw one of those. If I had to guess, I would suggest it was probably to mount an air pump for the emissions system.
There is really no oil pressure acting on that seal so it shouldn't be popping out very easily. If you do use sealer on it, put the sealer on the plug, not the head. If you put a layer on the head, then push the plug into it, some of that sealer will get pushed in further and could block the oil drain area.
Saturday, April 23rd, 2011 AT 9:23 PM