Originally Posted by
NeedsWings
I would pull both main covers off the car to thoroughly clean then before resealing them. doing it on the car is a shortcut that could go bad.
As a person that has done this a number of times, Rob (Needswings) is correct. To properly re-seal the breather (small) covers, one MUST carefully remove every last trace of old sealant.
And I mean Every last remnant. And both surfaces must be perfectly dry before application.
Doing it in-place is possible, of course. But I would spend the extra time.
P.S. the rubber valve cover (large) gaskets are re-usable if not damaged.