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Blue smoke

Discussion in 'Intermediate CJ-5/6/7/8' started by BLACKMGTD, Aug 20, 2009.

  1. Aug 20, 2009
    BLACKMGTD

    BLACKMGTD STEVE

    CANTON CT
    Joined:
    Aug 19, 2006
    Messages:
    110
    My '75 cj-5 w/258, sits for a few weeks (sometimes longer) between starts,, When it is started, I get blue oil smoke from the exhaust, which goes away after a minute or two. If it is started again after a few hours, no smoke. Do you think this just oil seeping by the guides while it sits unused, untill the engine heats up? It's got plenty of power, and doesn't missfire at all.
     
    BLACKMGTD, Aug 20, 2009
    #1
  2. Aug 20, 2009
    lynn

    lynn Time machine / Early CJ5 HR Rep Staff Member

    Huntingdon PA
    Joined:
    Sep 20, 2002
    Messages:
    3,437
    Sounds like the correct diagnosis to me.
     
    lynn, Aug 20, 2009
    #2
  3. Aug 20, 2009
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
    Joined:
    Aug 10, 2003
    Messages:
    23,596
    I would check a couple of things. First,, make sure your PCV system is open and the PCV valve is clean. Second, I'd look under the valve cover to see if oil is pooling in there. I believe this engine has rubber cup-style valve stem seals. Using the proper technique, these can be replaced without removing the head.
     
    timgr, Aug 20, 2009
    #3
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