Is it okay to use the later Gortex cam cover gaskets part nos
EBC 9628 and 9627 on my 1971 pre HE V12.
It’s OK, but you might not want to.
There are two very workable ways to ensure reliable sealing of the
Gortex cam cover gaskets in combination with an aluminum half
A new rubber half moon seal used with no cam cover gaskets at all
– cam cover-to-tappet block interface sealed only with sealant such
as Loctite 518.
It must be emphasized that rubber half moon seals should NOT be used
with a cam cover gasket of any sort. The rubber half moon seal does
not provide the rigid surface necessary for secure compression and
reliable sealing of a gasket. If it seals at all, it’ll only be as a
result of heavy gooping of sealant on everything, and it’s not likely
to last too long before it starts leaking.
Option 1 above will last the life of the owner of the car, it’ll
never leak again. Option 2 will last until the rubber half moon seal
disintegrates, which varies depending on the quality of the half moon
seal used but should last a good ten years at least.
Thing is, aluminum half moon seals cost money, and those Gortex cam
cover gaskets are extortionarily priced. Option 2 is a lot cheaper,
and you’re likely to have the cam covers off every decade or so for
valve adjustment anyway.
Don’t forget that you’ll want to replace the cam cover bolts as well.
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