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oil in exhaust

Discussion in 'Intermediate CJ-5/6/7/8' started by my73cj5, Jul 16, 2012.

  1. Jul 16, 2012
    my73cj5

    my73cj5 Member

    Monroe, CT
    Joined:
    Aug 7, 2007
    Messages:
    126
    When first starting my jeep on the one side I have noticed some splatters of liquid on the ground below the exhaust, just thought is was some condensate in the pipe, however it seems to contain very fine oil particles, goes away once warmed up?

    Any idea's what that may be? A bad ring?

    Its a 73CJ5 with a 304 milage unknow. Never ck's compression.
     
  2. Jul 16, 2012
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Aug 10, 2003
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    Sure it's oil? Carbon from a too-rich mixture is black, and might be mistaken for oil. It sometimes comes out with the water condensed in the exhaust, and can splater.

    Usually oil comes out the tailpipe as blue smoke. There's no simple way for oil to get into the exhaust unless it goes through combuston, where it's burned and becomes blue smoke. Look for brown-black tarry deposits on your spark plugs, as evidence of oil burning.
     
  3. Jul 16, 2012
    johneyboy03

    johneyboy03 The green beast

    Quebec, Canada
    Joined:
    Jan 15, 2011
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    2,118
    Hum, weird you have dual exhaust? because muffler can condensate water in it, it could be only water that mix with the carbon inside de muffer and that's why you see black spot on the ground that make you thinking about a bad ring....i may be wrong too just try to help!!!

    Good luck finding the problem!!!
     
  4. Jul 16, 2012
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
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    4,275
    My '73 with the 258 did this when the float was sticking, it would spit black gunk out the tailpipe until it blew all the excess fuel out of the system.

    Since it is only doing this on one side, I think I would look at the ignition system first. Do you know the history of this Jeep? Pull all the plugs to see if they are burning equally, and yes a compression check wouldn't hurt either.
     
    Last edited: Jul 16, 2012
  5. Jul 16, 2012
    cookieman

    cookieman Member

    Colton,Calif
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    Jan 31, 2005
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    302
    I agree
     
  6. Jul 17, 2012
    my73cj5

    my73cj5 Member

    Monroe, CT
    Joined:
    Aug 7, 2007
    Messages:
    126
    I guess that is probably want it is, just only does it on one side, it has dual exhaust. thx

    I guess I will follow my normal path, drive it till it brakes, then fix it, don't look for stuff.
     
  7. Jul 17, 2012
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
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    23,596
    On a V8, one side of the exhaust is blocked and diverted to the other side through the manifold, when it's cold. So if the problem is related to engine temperature, you might see that.
     
  8. Jul 19, 2012
    deputyvaughn

    deputyvaughn Member

    North Alabama
    Joined:
    Feb 5, 2012
    Messages:
    99
    It is possible that you have an exhaust seal leaking or a cracked valve guide. If these are the case, the oil could get into your exhaust unburned, but such a problem will reveal itself fully in short order. Very unlikely actually, but possible.

    Scott
     
  9. Jul 19, 2012
    steve1973

    steve1973 Member

    Nolensville, TN
    Joined:
    Jul 27, 2011
    Messages:
    90
    How about the rubber valve seals? How much oil do you lose between 500 mile intervals?
     
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