Burning oil, but compression is good.

Posted by knight007, Sep 20, 2006
420A Bolt-on Tech - Intake, exhaust, ignition, fuel system, cooling, etc - specific to 2G N/T DSMs. New Members must limit their 420A tech posts to this forum.

  1. knight007

    knight007 Proven Member

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    cookeville/murfreesboro, Tennessee
    Ok i have a 95 eclipse with roughly 160,000 miles on it. I haven't done any internals yet so heres my problem.

    im burning oil like crazy i burned about 4 qts. in about an hours drive of not getting on it but interstate cruising. I did a compression test and leak down tested. On the number 1 cylnder it was 250, #2 was 230, #3 was 230, and #4 was 250. It also didnt leak. Now it smokes at idle and driving but not alot. My spark plugs are black but there wasnt any oil on them. Im also not burning coolant.

    Any help would be appreciated.
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  2. 4UH8ERS

    4UH8ERS Proven Member

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    its obviously not a compresiion problem with those numbers. I would say you should probably replace you valve stem seals. especially if it smokes when you first start the car.
    also make sure the spark plug hole seals on the valve cover gasket arent shot.
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  3. ninjai_ruken

    ninjai_ruken Proven Member

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    ^^^^ I agree, I had the same problem. And redoing my whole head fixed the problem. Now you dont have to go to the extreme I did. But I thought that this was an excelent time to rework my head. Also make sure you replace your spark plug seals and your valve cover selas they are cheap..and very important. Good Luck:thumb:
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  4. Wherestheboost

    Wherestheboost Proven Member

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    Agreed to above posts. In the mean time ive been using thicker oil with additives with/or lucas treatment and it reduced my consumption by around 40-60 percent.
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  5. dr1665

    dr1665 DSM N/T Wiseman

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    I also agree, but you might consider buying a remanufactured head that's all ready to go, save cams. It will likely cost a bit more, but you can swap heads (don't forget the head gasket and timing belt stuff - maybe an oil or water pump while you're at it) in an afternoon and be back on the road with a spare head that you can either modify for performance in the future or sell to recoup some money. Blown valve seals are no reason why a used head should fetch anything less than average money.
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  6. knight007

    knight007 Proven Member

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    Thanks for all the help guys im going home tommorow and the head should get sent off friday.
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  7. knight007

    knight007 Proven Member

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    Ok I went home but before i head to take the head off i had to get it home so i put some oil in it and checked that started it up and it drove great i am confused beyond believe. I didnt burn any oil and i drove it all weekened a good 30 miles a day. Im lost??
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  8. 4UH8ERS

    4UH8ERS Proven Member

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    Hopefully you have oil pressure LOL. j/k.

    hey cars do wierd things it will probably start burning oil again soon. I would suggest you run some seafoam through the motor. use some vacuum hose and suck up about half the can through the pcv valve to intake manifold hole. shut the car off immedatly for about 5 minutes and then restart it. drive the crap out of it for 15 minutes and burn it all out. then re-check for your previous symptoms.
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