Thick oil smoke ONLY on decel in gear..WHY??
08-27-03, 12:28 AM
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Thick oil smoke ONLY on decel in gear..WHY??
What the hell... I'm trying to sell my car, and suddenly it starts smoking.
It ONLY smokes (and it is definately oil) when I'm decelerating in gear- so it's only during very high manifold vacuum.
It's thick too- like a cloud in my rear veiw mirror.
I can't think of any reasons why this would be happening.
My oil pan is under vacuum- which is where the turbo drains- so I doubt it would be the turbo oil seals, since the vacuum really assists the drain. It was perfect untill a few days ago. There was nothing that happened either, I just suddenly noticed it.
What the hell?
It doesn't do it at any other time, not during aceleration, or idle.
It ONLY smokes (and it is definately oil) when I'm decelerating in gear- so it's only during very high manifold vacuum.
It's thick too- like a cloud in my rear veiw mirror.
I can't think of any reasons why this would be happening.
My oil pan is under vacuum- which is where the turbo drains- so I doubt it would be the turbo oil seals, since the vacuum really assists the drain. It was perfect untill a few days ago. There was nothing that happened either, I just suddenly noticed it.
What the hell?
It doesn't do it at any other time, not during aceleration, or idle.
08-27-03, 07:21 AM
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Does it smoke coming down from all/any RPM? Or just the upper range of engine speed?
My old 12A began smoking ~5K+ on decel....then it just progressed down to 3K...anything over 3K and let off the gas and voila instant james bond smoke screen.
Miles on the motor/turbo?
My old 12A began smoking ~5K+ on decel....then it just progressed down to 3K...anything over 3K and let off the gas and voila instant james bond smoke screen.
Miles on the motor/turbo?
08-27-03, 09:55 AM
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Originally posted by Josepi
My old 12A began smoking ~5K+ on decel....then it just progressed down to 3K...anything over 3K and let off the gas and voila instant james bond smoke screen.
My old 12A began smoking ~5K+ on decel....then it just progressed down to 3K...anything over 3K and let off the gas and voila instant james bond smoke screen.
Did you ever tear that thing apart to see what it was?
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08-27-03, 10:22 AM
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Originally posted by Black13B
How long did that take to happen (smoke @ lower RPM)?
Did you ever tear that thing apart to see what it was?
How long did that take to happen (smoke @ lower RPM)?
Did you ever tear that thing apart to see what it was?
08-27-03, 11:16 AM
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Ahh I see. 
I've got a problem like that sort of. I'm more suspicious of my MOP than anything. Decel after hitting redline or revving to redline will conditionally (sometimes) make some of the blue stuff. I've been paying much attention to my MOP lines. I think that's where the problem is, rather than sideseals. (My car has the equivalent of.. roughly 120,000 miles).
I've been strongly considering lately rebuilding the thing over winter. Not sure if I should. Compression is strong, but I was thinking it might be good as a learning experience and to do it before the unthinkable should happen.
I've got a problem like that sort of. I'm more suspicious of my MOP than anything. Decel after hitting redline or revving to redline will conditionally (sometimes) make some of the blue stuff. I've been paying much attention to my MOP lines. I think that's where the problem is, rather than sideseals. (My car has the equivalent of.. roughly 120,000 miles).
I've been strongly considering lately rebuilding the thing over winter. Not sure if I should. Compression is strong, but I was thinking it might be good as a learning experience and to do it before the unthinkable should happen.
08-27-03, 03:23 PM
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S5 OMP is electronic.
Engine only has 2000 kilometers on it.
It could be the turbo, but if that was the case, why wouldn't it blow smoke all the time??
I'm thinking the oil rings in the engine, with the wigher vacuum pulling the oil through them.
Engine only has 2000 kilometers on it.
It could be the turbo, but if that was the case, why wouldn't it blow smoke all the time??
I'm thinking the oil rings in the engine, with the wigher vacuum pulling the oil through them.
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