Exhaust smoke leaves tan ash on my '7
07-21-04, 12:08 PM
#1
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Exhaust smoke leaves tan ash on my '7
I washed my car the other day (for the first time in a long time) and I have noticed that my exhaust has been leaving some kind of yellow/tan/brown ash or whatever it is on the rear right corner of my vehicle....all the way from the bumper (sides and top) up to just below the hatch. It wasn't doing this before though. (before what? is the question).
Also, I have noticed that my car smokes now.... running at idle, there's a faint white smoke coming out of it. I don't know what it does it higher speeds but I'm willing to bet it does there too. The engine temp does not make any difference on whether or not it smokes either.
Any ideas?
Thanks!
-Jeff
Also, I have noticed that my car smokes now.... running at idle, there's a faint white smoke coming out of it. I don't know what it does it higher speeds but I'm willing to bet it does there too. The engine temp does not make any difference on whether or not it smokes either.
Any ideas?
Thanks!
-Jeff
07-21-04, 12:14 PM
#2
84SE-EGI helpy-helperton
Same here - it's oil residue.
Next time you cold-start the engine go around back and see if the smoke has any bluish 'tint' to it. If not, it's coolant, which could mean that your engine is sucking coolant past a sealing rubber and will need a rebuild soon. If it's blue tinted, then it's oil burning due to getting past your Oil Control Seals and/or a bad OMP that's overpressurizing the feed lines - this is very rare, however.
I have the same pattern of ash on the back of my SE, though it also is on the underside of the rear whaletail. Should come off easily with a little car polish and some elbow grease. HTH,
Next time you cold-start the engine go around back and see if the smoke has any bluish 'tint' to it. If not, it's coolant, which could mean that your engine is sucking coolant past a sealing rubber and will need a rebuild soon. If it's blue tinted, then it's oil burning due to getting past your Oil Control Seals and/or a bad OMP that's overpressurizing the feed lines - this is very rare, however.
I have the same pattern of ash on the back of my SE, though it also is on the underside of the rear whaletail. Should come off easily with a little car polish and some elbow grease. HTH,
07-21-04, 12:19 PM
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Great.... the damn thing was just rebuilt by Rotary Performance in Garland, TX 45k miles ago... then again, I run it HARD too... I'm sure that doesn't help any.
Oh well... guess I'll use BDC next time and get it BP'd too!
As for my OMP, I know it's out (99.9% of the time it is anyway) so I've been having to premix.
Guess I should have stated that from the beginning, huh?
Oh well... guess I'll use BDC next time and get it BP'd too!
As for my OMP, I know it's out (99.9% of the time it is anyway) so I've been having to premix.
Guess I should have stated that from the beginning, huh?
07-21-04, 12:51 PM
#4
84SE-EGI helpy-helperton
Most pre-mix ratios are going to be enough that you'll see it in the exhaust. Your ash residue may actually be the premix getting burned up. Try lightening the ratio next fillup and see what happens.
If you're premixing in addition to you OMP working, then you have definitely created an oil-rich mixture that's going to look like a smoke screening car.
I don't have a premix excuse, only too many miles, worn our Oil Control Seals, and cold start smoking...
If you're premixing in addition to you OMP working, then you have definitely created an oil-rich mixture that's going to look like a smoke screening car.
I don't have a premix excuse, only too many miles, worn our Oil Control Seals, and cold start smoking...
