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spuggy spuggy is offline
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Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 2,835
I had a cylinder base gasket leak (#5 in my case, IIRC) develop 20,000 miles after rebuild. The shims used were very thin, and just the one gasket got chewed up and part of it was crinkled up and sticking out of the base by 10-15mm.

I just noticed the oil spoor in the regular parking spot - wasn't like I drove the car hard and it was leaking after. Cylinder head studs (from Supertec) were all fine.

Shop found nothing apparently wrong - although they did point out trace indications of detonation on a couple of pistons, but no way of telling precisely when that happened.

They decided the shims were too thin, increased the thickness to .5mm or 1mm (I forget) so they'd behave like a real copper gasket.

No problems since.
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'77 S with '78 930 power and a few other things.
Old 05-29-2010, 11:19 PM
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