: Crankshaft pulley wobble



accuab
10-14-13, 12:29 AM
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.

Black Beauty DTS
10-14-13, 02:52 AM
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.

Ranger
10-14-13, 10:33 AM
Yup, it's the elastomeric bond between the inner and outer ring that's failing.

SC2150
10-14-13, 07:02 PM
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,

Black Beauty DTS
10-14-13, 11:17 PM
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.:banghead:

SC2150
10-15-13, 08:38 AM
Your not alone. For years and years most were externally balanced. :thumbsup: