Quote Originally Posted by Stumpy View Post
Proceed with caution though-
my wife's old Cavalier had a similar plug issue but it turned out just to be improperly torqued or sealed and it didn't allow the fuel to compress/ burn all the way. Changing the plugs and see where it takes you, it may just sort out. Which gasket are you talking about anyways?

The valve cover gasket. I changed it about 50,000 miles ago with a leak. I am just about to turn 100,000 miles.