what is the standard for changing valve gaskets in a 1996 Subaru Legacy outback with 139,000miles on it?
3 Answers
If they are not leaking leave them alone. The option is to take the time to change them while inspecting, cleaning and replacing the covers. I do not believe you need to adjust. That model year were self adjusting.
Valve cover gaskets are not a maintenance item. If they don't leak. leave them alone.