Is it the harmonic balancer??
#1
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Join Date: Oct 2009
Location: Fauquier County, Virginia
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Year: 1991
Model: Cherokee
Engine: I-6 4.0 HO
Is it the harmonic balancer??
Ok, so when I bought my '91 Cherokee, the go who sold it to me said that he had owned one just like it previously and at about 200,000 miles it started making a whining noise. He told me it was the old harmonic dampener and said I should listen at mine when she gets at around 200k miles. Well, Im close, and I'm hearing a whine. It doesn't seem like a belt squel or anything, so Im aksing:
1) Would this be the probably cause?
2) How do I make sure?
3) Could the vibrations of the failing balancer cause a spark plug to pop out?
Thanks guys.
1) Would this be the probably cause?
2) How do I make sure?
3) Could the vibrations of the failing balancer cause a spark plug to pop out?
Thanks guys.
#3
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Join Date: Jan 2010
Location: Elkview WV
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Year: 1993
Model: Cherokee
Engine: 4Liter HO
I've seen multiple 4.0 powered XJ's with separating balancers. If you look down at the balancer you'll see a rubber ring that looks like its slipping out of the balancer. You'll know it when you see it, its unmistakable. If you see this, its time for a new one. Sure you can probably get thousands of miles out of it and lord knows I have but the part is still failing and its not good for your rotating assembly. Can it cause a spark plug to come out? I doubt it. Can it cause belt whine? Absolutely.
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