Ok, I cant take it anymore. driving down the damn freeway and my valve cover gaskets are letting loose enough oil that the freeway behind me looks like a damn war zone. I have tried cork, rubber, cork with steel center and rubber with steel center... I GIVE UP! What a shitty design for GM to have 4 [darn] bolts hold down that cover! I am going to have to take this [darn] thing somewhere and pay someone to seal my [darn] valve cover gaskets... how absolutely retarded!! What the hell can I do to seal these damn things?