DannoSupra Posted December 6, 2006 Share Posted December 6, 2006 Starting it up in the morning, a poof of smoke, well a small cloud i shud say And after 20miles of driving normally 70-80mph, when stationary at a junction... WOW!!!! BIG cloud of blue/grey smoke! Oops! Am i right in saying that the both my Turbo and Stem seals are nakerd? Btw, it dsnt use any oil at all!!!! Strange... Is it worth me doing a leakdown test? cheers people Link to comment Share on other sites More sharing options...
Homer Posted December 6, 2006 Share Posted December 6, 2006 If its suddenly started doing this then I'd say is unlikely to be stem seals. Is the smoke def. blue or is it more black? If its more black in colour if could be as simple as a boost leak (blown IC pipe). Link to comment Share on other sites More sharing options...
wkdtime Posted December 6, 2006 Share Posted December 6, 2006 Is the smoke def. blue or is it more black? If its more black in colour if could be as simple as a boost leak (blown IC pipe). Well spotted as its a UK, i.e MAF based. Link to comment Share on other sites More sharing options...
Carl Posted December 6, 2006 Share Posted December 6, 2006 It could be one or the other or both. Usually stems seals are apparent first thing in the morning as the oil builds up over night. This oil burns off when you start it hence smoke. Usually this will clear quite quickly. Turbo seals are more apparent when stationary in traffic as you describe also. Sometimes removing cats & original exhaust can high light these problems partially due to less back pressure etc. IT's very difficult to diagnose properly without having a leak down test done to rule out the stem seals first. Link to comment Share on other sites More sharing options...
DannoSupra Posted December 6, 2006 Author Share Posted December 6, 2006 It could be one or the other or both. Usually stems seals are apparent first thing in the morning as the oil builds up over night. This oil burns off when you start it hence smoke. Usually this will clear quite quickly. Turbo seals are more apparent when stationary in traffic as you describe also. Sometimes removing cats & original exhaust can high light these problems partially due to less back pressure etc. IT's very difficult to diagnose properly without having a leak down test done to rule out the stem seals first. Exactamundo! my cars' fully de-catted, i'll do a leak down 2moz if i get a chance... cheers for the info people, very much appreciated! Link to comment Share on other sites More sharing options...
Guest Nurzo Posted December 7, 2006 Share Posted December 7, 2006 From my understanding a leak down test is a test of how much compressed air leaks out off the cylinder IE: testing for ring and valve seat leakage. What has this got to do with valve stem seals which are not on the compression side of the combustion chamber? Steve Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 7, 2006 Share Posted December 7, 2006 From my understanding a leak down test is a test of how much compressed air leaks out off the cylinder IE: testing for ring and valve seat leakage. What has this got to do with valve stem seals which are not on the compression side of the combustion chamber? Steve You are correct, a leakdown test could be brilliant with no stem seals on the guides at all. Link to comment Share on other sites More sharing options...
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