Engine Knock at Idle Only

Discussion in 'Touring Models' started by franka, Jul 11, 2011.

  1. franka

    franka Active Member

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    07 Road King with 23,000 miles. Noticing a knocking sound from engine at idle only and particularly when warm. Knock does not seem to be there when moving, any ideas?
     
  2. dbmg

    dbmg Experienced Member

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    What happens when you pull in the clutch while idling??
     
  3. franka

    franka Active Member

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    Not sure, I'll try and let you know. What is your thought if when clutched depressed it goes away?
     
  4. Hoople

    Hoople Account Removed

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    Also may want to check the compensator for a cracked convex spring washer. Sounds like some play could be present. Under power, slack would be taken out but at idle would knock. (Also a good time to check primary chain tensioner)
     
  5. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    Can you tell where the knock is coming from? Right side, left side, top, bottom?
     
  6. franka

    franka Active Member

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    Regarding where knock is coming from, just to hard to tell but seems more like top end.
     
  7. glider

    glider Veteran Member

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    It could be a loose compensator nut also besides anything damaged.
     
  8. traveller

    traveller Member

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    I agree with Glider, I had the same thing with my heritage springer, a mechanic told me to check the torque on the compensator nut, tightened it to specs, no more knocks.
     
  9. RibEye

    RibEye Junior Member Contributor

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    Correct me if I'm wrong, but, I seem to recall that the compensator nut is to be installed using red Loctite. If so, how in the world does it come loose on its own? Not a challenge. I've seen it. I just don't understand how it happens.

    Enjoy,
    Rich P
     
  10. Hoople

    Hoople Account Removed

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    Rich, I have wondered the same thing. You said you have seen it happen. I never have. My question is this. Have you seen it happen to an original factory virgin compensator bolt,, or did it happen to a once removed, re-loctited, re-tighten crank bolt.

    I would be surprised to see a factory original bolt, installed from the factory come loose on it's own. I could see any "other way" come loose on it's own but not a factory original, clean, dry installed new factory bolt. Especially on the current "96" cranks. (pre-gear cover style)

    Only a theory & opinion. I don't have enough experience on these bikes to know with any certainty what is true fact. And like you said,, not a challenge. Just wonder the same idea.