[Sevens]

I always use the cork gaskets and apply RTV to the valve-cover side only.

In my opinion, there is no reason to put RTV between the gasket and the cylinder head...the head has been machined flat and smooth which makes for a good mating surface for the gasket. Valve covers are notorious for not having flat and/or square mating surfaces.

I've never had any issues with leaks.


Edit to add: I have taken mine off and put them back on a couple of times and still have no issues with leaks.