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Is it the outer ring wobbling of the entire damper? From what I can tell, the assembly indexes / datums axially on the OD of the timing sprocket and is held square by its face.

If your sprocket was loose, you could have a problem.
Another test would be to check the runout with the motor off. IF you take the pulley back off again, look for fretting marks to see if its moving.

The outer ring will move in response to engine harmonics, but its not supposed to wobble.


The entire pulley appears to be moving. It's pretty subtle, and I did actually put a few hundred miles on it before I caught it. But since I noticed it and talked to you guys, I'm thinking the sprocket slop has allowed it to be tightened down slightly off kilter. I don't THINK it's actively moving on the shaft, but once I have it apart I'll check for signs as you recommend.

Any hints you can give me for testing runout? Haven't done that before but I'd be curious to check it on this motor.

1998 Gen 2.5 Montero w/ winter package