I have never liked cork composition gaskets!
There made of particles that hopefully stay bonded together and after enough time or being tightening they don't!
If I am in a position where I have to use a cork gasket I first seal it on both sides with a film of form-A- gasket and I let it dry fully before I install the gasket.
If you have a wavy stamped steel valve cover in use then that's a very likely cause of your leak, dispite using a thick gasket.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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