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Projects New engine has oil in the exhaust

Discussion in 'The Hokey Ass Message Board' started by Devmar07, Feb 28, 2018.

  1. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    Yesterday I was breaking in my new sbc and it started fine with quite a it of smoke which I'm told is normal at first. I put the timing light on it and noticed it was severely retarded before I could get the timing right it started get hot so I shut it down. I went to work on it today and noticed oil around and exhaust leak so I pulled a plug and it have a lot of oil on it. Is it normal for a new engine to do this because the rings haven' seated or do I have a bigger problem.
     
  2. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,541

    greybeard360
    Member

    Terrible80 likes this.
  3. What are you using for rings?

    How was it built? Lots of things to ask and so little time. LOL

    Nope a properly rebuilt motor does not pump oil out the exhaust.
     
    Mark Hinds likes this.
  4. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    Not sure of the rings or build I bought it from rebuilt
     

  5. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,853

    Mike51Merc
    Member

    Sometimes if they sit on a shelf for a long time the valve stem seals can get hard and brittle and fail to seal.
     
  6. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    I should be able to see that under the valve covers right. I really don' want to tear into this thing when I just got it started and it seemed to be running ok being retarded and all
     
  7. Baumi
    Joined: Jan 28, 2003
    Posts: 2,635

    Baumi
    ALLIANCE MEMBER

    A friend of mine had a similar problem on his freshly rebuilt 331 Hemi. He found out that he had put on the piston rings upside down , so the taper on the second ring pushed the oil up instead of scraping it down to the oil rings, so it could drain back into the crankcase. It burn a lot of oil and the exhaust pipes were really oily.
     
  8. Around here rattle can rebuilds are popular. New external gaskets and a coat of paint.
     
  9. If there's oil in the cylinder, that's not good. Do a leak down test.
    If there oil in the exhaust but not in the cylinder that's a leaky valve stem.
     
    olscrounger likes this.
  10. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    I'e had my bore scope in each cylinder and everything is brand new it has a lot of high end parts so I would hope the person who built it wouldn' put the rings in upside down but yp never know. I haven' pulled all the plugs but it looks like at least 4 cylinders but it' probably all of them. So this definitely isn' a new from the rings not being seated. I' hoping for something easy if you guys can' tell because I'm not an engine builder and I wouldn' even know where to start.
     
  11. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,853

    Mike51Merc
    Member

    If it smokes on deceleration, and on starting after a complete stop, I'd suspect valve guides. It is smokes on acceleration, suspect the rings.

    Also, sometimes the rings need some breaking in before they fully seat. I had a brand new OT car that burned a quart every 1000 miles until it hit about 10,000 miles. Still have the car with 135,000 miles and it doesn't burn any at all.
     
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  12. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    Your my favorite person so far
     
    biggeorge and pat59 like this.
  13. Got the impression that it was pumping oil. Didn't sound like it ran very long. But I have certainly misunderstood before.
    Chrome rings ( almost no one uses them any more) take a longer to seat than do cast rings. I am not sure about the newer plasma moly rings.

    Another thing that will make one smoke is ring gaps lined up.
     
    biggeorge and J. A. Miller like this.
  14. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,541

    greybeard360
    Member

    Call the guy that built it... He should be involved before you start tearing into it.

    Sent from my Moto G Play using The H.A.M.B. mobile app
     
    afaulk, Mark Hinds, Frankie47 and 3 others like this.
  15. Relic Stew
    Joined: Apr 17, 2005
    Posts: 1,129

    Relic Stew
    Member
    from Wisconsin

    Is there a way for oil to get in the intake?
    A poorly sealed manifold gasket can let oil into 1 or 2 cylinders, but all would be unusual.
    Does it have PCV? If so how is it routed? I had an engine that sucked a lot of oil out of the valve cover when it was sustained over 3000 rpm. Like 1 quart in 300 miles. Under 3000 it was fine. I moved the PCV valve from the back of the valve cover to the front, and that helped.
     
    Chiss likes this.
  16. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    I was told it was built by Lynn Shultz which I never found but it appears to have been built for racing it has a big mutha thumpr roller cam speed pro domed pistons double hump heads and was bored .30 over. It' supposed to be 12 to 1 compression and yes I'm using race gas. Edlebrock intake demon carburetor racing distributor without mechanical advance. Not sure if any of this helps but I'm going to put another set of plugs in it and hopefully it will start so I can run it longer.
     
  17. woodiewagon46
    Joined: Mar 14, 2013
    Posts: 1,742

    woodiewagon46
    Member
    from New York

    Are you talking oil in all eight cylinders?
     
  18. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    Haven' confirmed yet but that' what it looks like
     
  19. gasshole
    Joined: Oct 1, 2006
    Posts: 329

    gasshole
    Member
    from new jersey

    Get your timing right and run it a while, Retarded timing will make it run real hot real fast. Who know what they assembled it with. You might be fine.
     
  20. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    Just pulled 6 plugs the other 2 I have to pull the header but they are all fouled and cylinder 2 had about a cap full of fuel and little oil mix
     
  21. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    Thanks for all the help I'm starting to feel a ittle better.
     
  22. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,541

    greybeard360
    Member

    If that is a "racing distributor without mechanical advance", that would mean it is a locked distributor, wherever you set the timing is where you are at. That motor would need 38-40 timing and it isn't going to start without spinning the motor and then turn on ignition unless it has a retard module on it.

    So, you have a motor that you really don't know anything about, or the builder. And it appears you have limited skills with a motor.

    I think you need one good friend that knows about motors that drinks beer.....

    Sent from my Moto G Play using The H.A.M.B. mobile app
     
  23. trollst
    Joined: Jan 27, 2012
    Posts: 1,853

    trollst
    ALLIANCE MEMBER

    Could be it was stored with oil in the cylinders, I'd fire it up and run it, do the twenty minute cam breakin thing, then check, stop being all panicky.
     
  24. badvolvo
    Joined: Jul 25, 2011
    Posts: 471

    badvolvo
    Member

    from my experience, pull the PCV and see if that line is full of oil. A lot of aftermarket valve covers do not have a baffle, and they will suck a lot of oil. Do your valve covers have a baffle? I would run it a while with the PCV line plugged at the carb or intake, if you see a lot of blowby, if so, ring problem. If not, I bet oil is splattering out the PCV hole in the valve cover.
    If that roller cam is a solid roller, oil should be restricted to the top end.
     
    Chiss likes this.
  25. greybeard360
    Joined: Feb 28, 2008
    Posts: 1,541

    greybeard360
    Member

    It's a roller cam,.. no break in required.

    Sent from my Moto G Play using The H.A.M.B. mobile app
     
  26. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    All my friends drink cheap beer which is against my religion to buy but I guess I can make any exception.
     
  27. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    It' a hydraulic roller
     
  28. Devmar07
    Joined: Sep 2, 2017
    Posts: 117

    Devmar07

    The covers do have baffles but I'm using breathers with no pcv
     
  29. LM14
    Joined: Dec 18, 2009
    Posts: 1,936

    LM14
    Member
    from Iowa

    I've had race engines that smoked a lot on initial startup. Put a new set of plugs in it, set the timing and let it seat the rings. Maybe the guy soaks the piston/ring assembly in a bucket of oil. Let it try to break in, don't panic until it's been thru a heat cycle or 2.
    SPark
     

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