Date: Tue, 23 May 2000 23:32:00 -0400
From: "sthu" <>
Subject: Re: Diagnosing compression test

If you think ring(s) are bad, wouldn't you end up with oily plugs (since more oil coming into the cylinder)? What about bad head gaskets? Also, severe carbon build-up on valves could cause valves to not seat properly and leak pressure. st Andrew <> wrote in message news:8gdgfv$ber$ > I've been suffering from an erratic idle ever since I bought my 89 900t a > year ago. A dry compression test has shown that no. 3 cylinder is reading 8 > bar (versus 10.3 bar for the other cylinders). A wet test brings all four > cylinders up to 14 bar. Any suggestions about what mey be the cause? A > broken piston ring maybe? Sounds serious whatever. > Cheers, > > Alan. > >

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