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Re: 1971 GMC smokes but excellent compressionPosted by G-MAN on November 06, 2003 at 15:47:25 from (67.52.48.10): In Reply to: 1971 GMC smokes but excellent compression posted by Jeremy on November 06, 2003 at 00:00:50:
If you have good compression, it could be as simple as leaking valve stem seals. I would do a cylinder leak-down test to make absolutely sure that your ring seal is good, and then proceed with a head rebuild from there.
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