Hi,
I recently replaced the failed harmonic balancer (vibration damper) on my '90 XJ 4.0L I6 5-speed. The vibration I was suffering lessened, but it is still very noticeable at around 2000 RPM (any gear, any speed). Anyone ever have any similar problems after replacing the HB on an I6?
I removed the serpentine and ran the engine to confirm that no other component on the belt line was the culprit. Sure enough: no belt, same vibe.
The new balancer looks good. It rotates with no discernible shimmy or wobble. One thing I did notice: the original balancer had a single balancing hole bored in it. The aftermarket replacement had two holes bored in it. Does this mean I got the wrong part?
My next step is to get a balancer from the dealer$hip and try that. Is there anything else I can try first before throwing more dollars into it? If it turns out that another balancer doesn't help, what next?
Thanks,
Steve