Oil residue on inside exhaust tip, plugs are clean?
11-04-2010, 05:41 PM
#1
Oil residue on inside exhaust tip, plugs are clean? So I'm trying to figure out where and how my car is losing/using oil. My exhaust tips have an oily residue on the inside, I have a few drops of oil on my garage floor after 2-3 weeks, and at WOT/high RPM, there is oil smoke out the back. Now my spark plugs all are very clean (running E85 and wideband) with NO oily residue or black soot on them, which makes me think it is not burning the oil in the chambers, right? I have 55-80 psi oil pressure as well. Any suggestions, things to check?
11-05-2010, 06:39 AM
#4
So I'm trying to figure out where and how my car is losing/using oil. My exhaust tips have an oily residue on the inside, I have a few drops of oil on my garage floor after 2-3 weeks, and at WOT/high RPM, there is oil smoke out the back. Now my spark plugs all are very clean (running E85 and wideband) with NO oily residue or black soot on them, which makes me think it is not burning the oil in the chambers, right? I have 55-80 psi oil pressure as well. Any suggestions, things to check?
11-05-2010, 08:53 AM
#5
Smoke only occurs at WOT, and is bluish, car is not running too rich per the wideband, .78 lambda at WOT, which should be fine for E85, although I could probably lean it out to .82 for the winter blend.
I am just puzzled how the spark plugs are clean showing zero sign of oil burning, but the tailpipes have oily residue on inside of them? The only thing that I can think of would be leaky exhaust valve seal?
I am just puzzled how the spark plugs are clean showing zero sign of oil burning, but the tailpipes have oily residue on inside of them? The only thing that I can think of would be leaky exhaust valve seal?
11-05-2010, 09:48 AM
#6
Mine was smoking at WOT and on occasion, I would get the whiff of burning oil. The back bumper was also getting black. Also saw that my intake was coated with oil on the inside too.
Oil was getting sucked in through the PCV and causing the problem. I installed a catch can and the problem appears to be history. I have not one smelled burning oil, the smoke at WOT is significantly less and there is much less oil in the intake. Plugs never showed any evidence of burning oil BTW.
Oil was getting sucked in through the PCV and causing the problem. I installed a catch can and the problem appears to be history. I have not one smelled burning oil, the smoke at WOT is significantly less and there is much less oil in the intake. Plugs never showed any evidence of burning oil BTW.
11-05-2010, 09:55 AM
#7
oil getting in the motor can be many different thiings.......the most common is what wrd1972 just said with the pcv sucking in oil........it could be that but if its smoking that bad at WOT idk about that..........also bad valve seals can cause the smoke or bad valve guides also.....at worst case scenario its a ring issue.....but idk about that.....
