Date: Tue, 22 Jul 2003 18:58:36 +0100 From: Grunff <grunffnopsam.com> Subject: Re: Smokin' exhaust - more info.....
Andy Evans wrote: > a mechanic has diagnosed this problem - oil burning in the exhaust at idle, > then going away (or not being obvious) at higher speeds - as hardened rubber in > the valve seats (is this the correct term?). Oil would drip on idle but less so > at higher speeds because of the vacuum. does this sound like the problem? I'm > about to put it into mhis hands. He seemed pretty confident, though we only > spoke on the 'phone. Not valve seats, valve stem seals. Valve seats are made of steel, not rubber. Andy, there are only a few things that could be causing your problem: [a] If the smoke is whilte and billowy - fluffy white smoke that lingers - then it can only be the head gasket. No ifs, not buts, only one possibility. [b] If the smoke is greyish and disperses quickly, and smells bad, then it's burnt oil. This could be caused by either worn valve stem seals, or a worn turbo. It isn't easy to tell which until you take the head off. Any decent garage should be able to tell you whether it's [a] or [b] - all it takes is a compression test. But either way, the next step will be to remove the head. -- Grunff
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