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oil is slowly spitting out of my exhaust, needs major work

This is a discussion on oil is slowly spitting out of my exhaust, needs major work within the General Help forums, part of the LSx Technical Help Section category; So I upgraded to a trans am from my 110k mile firebird because I got a sweet deal. However, the ...

  1. #1
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    Medium Blue Metallic
    1999 Pontiac Trans Am

    oil is slowly spitting out of my exhaust, needs major work

    So I upgraded to a trans am from my 110k mile firebird because I got a sweet deal. However, the engine has burnt 2 quarts of oil across 2000 miles. The car has 54k miles but "supposedly" the guy before me recently rebuilt the engine 5k miles ago. The reason for the rebuild was the previous owner running nitrous. Anyway I can see little droplets of oil spitting out the exhaust, tiny but consistant. I am guessing this is not a function of the recent rebuild but rather a poor job and the rings are leaky. Still runs strong. BTW car has mild cam, longtubes. Is this definetly rings or how should I diagnose? And if it needs rebuilding how should I go about it? I would like to spend less than $6000 if possible. BTW I am near the STL/memphis area.

    options:
    1) rebuild this engine with new rings
    2) get a remanufactured engine from jasper
    3) get an ebay low mileage engine
    4) other?

  2. #2
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Check the plugs. Are you for sure its oil out of the pipes. Sometimes the condensation inside the exhaust mixes with the soot and shoots out black liquid that looks like oil but is actually water turned black. Fbods are notorious for using oil in the first place mine did since new.

  3. #3
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    RED
    2001 CAMARO Z

    mine spits the black condensation out also

  4. #4
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    Medium Blue Metallic
    1999 Pontiac Trans Am

    Yea that actually came to my attention while I was examining the spray pattern. My exhaust has a thick layer of carbon build up so its possible its water condensation blackened. I will have to collect some to examine this further. I somewhat feel like an idiot for assuming its oil, but it is also consistent with oil loss of 2 qts across 2000 miles. I guess this could just be the rings seating themself from the rebuild 5k miles ago. Would a compression test be a good idea regardless?

  5. #5
    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    Quote Originally Posted by 99bluebird View Post
    Yea that actually came to my attention while I was examining the spray pattern. My exhaust has a thick layer of carbon build up so its possible its water condensation blackened. I will have to collect some to examine this further. I somewhat feel like an idiot for assuming its oil, but it is also consistent with oil loss of 2 qts across 2000 miles. I guess this could just be the rings seating themself from the rebuild 5k miles ago. Would a compression test be a good idea regardless?
    get the compression test. you shouldn't be loosing 2qt every 2000 miles thats not right.

  6. #6
    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
    98' trans am

    also replace your pcv valve

  7. #7
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    and check plugs.

  8. #8
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    Medium Blue Metallic
    1999 Pontiac Trans Am

    I am so newb. Please explain how the PCV valve and plugs could affect oil consumption?

  9. #9
    Member DaddySS's Avatar
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    2000 Camaro SS Conv.

    Plugs won't but PCV is there to provide vacuum to the "Crankcase" to draw off fumes and burn them. If it remains open excessively, it will provide too much vacuum and draw off oil too.

    1 to 2 Quarts per 2 to 3000 miles is not unusual for an LS1, especially when operated in high RPM, low load. Black condensation dripping is normal.

  10. #10
    old timer blue02Z's Avatar
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    Navy Blue Metallic
    2002 Z28

    when i tried royal purple my car started burning oil, but after swithcing away from it it doesnt burn very much at all. the only way i know it sometimes i can smell it in the exhaust


    by the way, do you smell burnt oil coming from the exhaust??

  11. #11
    Grand Imperial Wizard Sarge's Avatar
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    Sounds like your crankcase isn't ventilated as mentioned above.
    Check and insure your PCV valve is operation ( as mentioned already) make sure your vacuum hoses are all connected properly and you don't have any of them reversed....get a catch can.....lastly I would get a vented oil filler cap...........

  12. #12
    Senior Member slims00ls1z28's Avatar
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    2005 GTO M6 Black
    2000 Z28 A4 Red

    Checking the plugs wont help oil burn problems but should give you a good Idea of how much oil is actually getting into the combustion chamber.

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