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

Return to Main Index

The content on this site may not be republished without permission. Copyright © 1988-2020 - The Saab Network - saabnet.com.
For usage guidelines, see the Saabnet.com Mission and Purpose Page.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]