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Smoke on Startup 700 1990

posted by  Topher on  Mon Jun 3 04:28 CST 2002
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1990 760 Turbo Wagon smokes like crazy out of the tail pipe on cold start up. I believe this to be oil smoke. Once the car is up to normal operating temp, the smoke stops. It's more of an annoyance than anything at this point, but if I can avoid something expensive in the future by taking evasive action now, that would be preferable. Everything else seems normal. My initial guesses are piston rings, head gasket, or maybe a clogged PCV system. I've skimmed the FAQ and didn't see anything definitive. Anyone have any idea what this might be?


Thanks!







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    Smoke on Startup 700 1990

    posted by  turbinesurgeon on  Tue Jun 18 08:20 CST 2002
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    I have a 1988 760 turbo wagon and it does the same thing as yours, it might be the turbo. pull the intake hoses from the intercooler off and look for oil. Sometimes the oil seal in the turbo go bad. It also could be worn valve guids.








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    Smoke on Startup - more details 700 1990

    posted by  Topher on  Mon Jun 3 05:42 CST 2002
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    The smoke is heaviest right at startup but continues for maybe 3 minutes - until the car is good and warm. I wouldn't be as concerned it if were just a puff at startup, but it continues on a little after that. Of course, once it's good and warm, there is no indication of any smoke at all.








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    Smoke on Startup 700 1990

    posted by  someone claiming to be Al on  Mon Jun 3 04:54 CST 2002 [RELATED]

    If it's white don't worry. It is just condensation in the exhaust system.
    If it is Blue/black your valve seals could be going.







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