Originally Posted by jay-h
Though it well could be the rear seal, also check the back of the valve cover gasket. They can (I had this happen) leak down the back of the block and produce a similar pattern.
If it is a valve cover gasket, DO NOT get the cheap cork one. Spend the extra bucks and get the molded rubber one. WELL worth it.
Had them order in a NON CORK valve cover gasket for my aluminum valve cover. Just picked it up, it's aluminum. Thoughts?
Ooo, just opened it up. Looks like molded rubber with an aluminum core, so I guess I did get the right one after all.