Crankshaft pulley wobble
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Northstar Engines and System Technical Discussion Discussion, Crankshaft pulley wobble in Cadillac Engine Technical Discussion; My 02 sls has a slight wobble on the crankshaft pulley at idle. How do I go about fixing this? ...
  1. #1
    accuab's Avatar
    accuab is offline Cadillac Owners Member
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    Crankshaft pulley wobble

    My 02 sls has a slight wobble on the crankshaft pulley at idle. How do I go about fixing this?

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    From my reading I'm seeing the rubber on the harmonic balancer has worn out. Dies this sound right and how bad is this? It's a very small deviation from true straight and there are no adverse effects from it. I just noticed it today as I was looking at the belt.

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    Black Beauty DTS's Avatar
    Black Beauty DTS is offline Cadillac Owners Fanatic
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    Re: Crankshaft pulley wobble

    Yes, the harmonic balancer will need to be replaced eventually, because that slight wobble will get worse as time goes on. I had to replace mine which was getting worse fairly quickly. The last thing that you want is for this wobble to be the cause of your serpentine belt to be thrown completely off the pulleys. Don't ask me how I know.

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Crankshaft pulley wobble

    Yup, it's the elastomeric bond between the inner and outer ring that's failing.

  5. #4
    SC2150's Avatar
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    Re: Crankshaft pulley wobble

    Correct, although it is not a harmonic balancer as they are internally balanced...it is a crankshaft dampener, but Ranger is correct. Common issue on all GM engines. Inexpensive to replace,
    RX Performance Products/RevXtreme.com 941-721-1826

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    Black Beauty DTS's Avatar
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    Re: Crankshaft pulley wobble

    Quote Originally Posted by SC2150 View Post
    Correct, although it is not a harmonic balancer as they are internally balanced...it is a crankshaft dampener, but Ranger is correct. Common issue on all GM engines. Inexpensive to replace,
    You're right about it being a dampener, but I'm just used to calling the crankshaft pulley a harmonic balancer by default.

  7. #6
    SC2150's Avatar
    SC2150 is offline Cadillac Owners Connoisseur
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    Re: Crankshaft pulley wobble

    Your not alone. For years and years most were externally balanced.
    RX Performance Products/RevXtreme.com 941-721-1826

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