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e6 engine issues

Discussion in 'Mack Forum' started by blond angel, Sep 8, 2012.

  1. Sep 8, 2012 #1
    blond angel

    blond angel Bobtail Member

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    Sep 8, 2012
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    engine makes popping sound at idle sometimes, engine rpm wanders sometimes as well.
     
    blond angel, Sep 8, 2012
    blond angel, Sep 8, 2012
    #1
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  3. Sep 8, 2012 #2
    bender

    bender Road Train Member

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    Don't Kid Yourself
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    Is it popping out the exhaust?
     
    bender, Sep 8, 2012
    bender, Sep 8, 2012
    #2
  4. Sep 8, 2012 #3
    blond angel

    blond angel Bobtail Member

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    Sep 8, 2012
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    yes it is at the exhaust. not sure if it is a piston ring or camshaft or governor problem.
    or maybe something else, any ideas ?
     
    blond angel, Sep 8, 2012
    blond angel, Sep 8, 2012
    #3
  5. Sep 8, 2012 #4
    bender

    bender Road Train Member

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    Sounds like a problem with an exhaust valve. Could be that the adjustment on one valve is too tight (no lash). Does it run better when the engine is cold? Does this engine have Jake or exhaust brake?
     
    bender, Sep 8, 2012
    bender, Sep 8, 2012
    #4
  7. Sep 9, 2012 #5
    blond angel

    blond angel Bobtail Member

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    Sep 8, 2012
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    have checked valve adjustment, inlet is set at 0.016 and exhaust is set at 0.024
    the engine is a 1987 e6 285hp with dynatard with ambac pump.
    runs the same cold or hot
     
    blond angel, Sep 9, 2012
    blond angel, Sep 9, 2012
    #5
  8. Sep 9, 2012 #6
    bender

    bender Road Train Member

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    You have a bad exhaust valve.
     
    bender, Sep 9, 2012
    bender, Sep 9, 2012
    #6
    blond angel Thanks this.
  9. Sep 10, 2012 #7
    Tow Bandit

    Tow Bandit Bobtail Member

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    Jul 28, 2012
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    If you increase the revs by say 200-400 rpm, does it even out and sound sweet or does it stay the same?
     
    Tow Bandit, Sep 10, 2012
    Tow Bandit, Sep 10, 2012
    #7
  10. Sep 10, 2012 #8
    Tow Bandit

    Tow Bandit Bobtail Member

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    Jul 28, 2012
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    A piston with excessive carbon deposits on top or a dying, dribbling injector will give you similar symptoms. Your fault is "sometimes" and "sometimes" faults could be a number of things. When last did you run fuel system cleaner through it? Doing city runs and not getting a good pull up hill or a motorway run will give you grief in the end.
     
    Tow Bandit, Sep 10, 2012
    Tow Bandit, Sep 10, 2012
    #8
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