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mark houghton mark houghton is offline
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Join Date: Jul 2008
Location: Central Washington State
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Originally Posted by shbop View Post
Thanks to everyone for the replies! Ended-up going the Tial F46 route with a .8 spring. Not only was my diaphragm shot, but the guide was gone as well. Hope I guessed right on the spring. I saw the Pelican parts guru944 mentioned, and was tempted to make a go of repairing my stock unit, but closer inspection showed other problems.
Many moons ago someone posted info on having a machine shop craft a new valve guide, but darned if I can find it anymore. The guide and the diaphram are really all that fails these old WG's (well, there's also a high temp gasket - probably asbestos - between the upper and lower chambers that can leak over time). I was able to fix that leak, but the blow-by through the guide was making the WG act decidedly non-Porsche'ish. Tial was the ticket for me.
Mark H. 1987 930, GP White, Wevo shifter, Borla exhaust, stock everything else. The result of a massive Pelicanite good will fire recovery effort. Truely an open book, ready for the slippery slopes to modification.
Old 11-26-2013, 12:34 PM
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