Replaced about 3 years ago. Resealed twice since then (in the corners). This past time I noticed that it's getting hard, so it's probably time for another new gasket, but it's almost time for a new timing belt anyhow (I'm at 80k). I'll limp along until spring or summer then do TB & gasket (again). Maybe this weekend I'll check and see if i can tighten down the valve cover some more, maybe it's just loose.
Originally Posted by khittner
Supton: Valve cover gasket?