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f134 valve questions

Discussion in 'Early CJ5 and CJ6 Tech' started by jersey-jeep, Sep 1, 2009.

  1. Sep 1, 2009
    jersey-jeep

    jersey-jeep New Member

    north west nj
    Joined:
    Aug 29, 2009
    Messages:
    15
    hey guys little new around here and was wondering on your opinion on this.
    i have a 66 cj5 with a f134 engine. it runs pretty good but had a bad exhaust leak from the #4 cylinder at the manifold. when i removed the manifold the stud looked like it had been broken for quite some time and i got the jeep recently so i dont know how long its been leaking. it looked oily in the exhaust port so i did a compression test and got 130 lbs on the front 3 cylinders and 110 on #4 and it would smoke a bit if you reved it up. do you think possibly burnt valve from exhaust leak? is it worth pulling the head to check things out? if it is can a new valve be put in with the engine still in the jeep im not used to this design with the valves in the block. thanks for the help
     
    jersey-jeep, Sep 1, 2009
    #1
  2. Sep 2, 2009
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,379
    110# isn't too bad. Did you fix the exhaust leak? If it runs good, no misses and doesn't use too much oil as in fouling plugs why don't you just run it as is for a bit. That might give you a better idea of what work it needs if any.
     
    Glenn, Sep 2, 2009
    #2
  3. Sep 2, 2009
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
    Jul 30, 2003
    Messages:
    8,525
    what Glenn said
    typically, a burnt valve will get you a very noticable spit or two out the exhaust pipe at idle. You can put your hand near the pipe and feel it spit at you. It will smooth out if you rev the engine slightly.
     
    jpflat2a, Sep 2, 2009
    #3
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