Harmonic Balancer question

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Nov 1, 2005 | 01:53 PM

mr mctavish

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From: port orange fla.

Harmonic Balancer question

I developed a bad engine knock, got it home, checked and saw that the Harmonic Balancer is wobbling, the pullys are true. the sound is stomach turning. question is could it be the crank ? or did I get lucky and thats just the problem?

good oil good pressure no metal in pan

Nov 1, 2005 | 03:11 PM

Gordonm

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From: Forked River NJ

Sounds like the rubber ring has let go. If the center of the balancer is still true (pulleys still staright) and the outside ring is wobbling replace the balancer. Do it now before it comes apart.

Nov 1, 2005 | 04:12 PM

CA-Legal-Vette

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From: Scottsdale Arizona

I can't think of a way it could be the crank with the pullys remaining true.

Nov 1, 2005 | 06:54 PM

mr mctavish

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From: port orange fla.

do you think that would cause a loud knocking as opposed to vibration?

Nov 1, 2005 | 06:57 PM

Fastguy

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From: This vette goes to 11 Milford MA

St. Jude Donor '03-'05

If the balancer has seperated from the rubber ring part, it will quickly destroy the bearings. If you have a loud knocking, it may be too late.

Nov 1, 2005 | 07:13 PM

Gordonm

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From: Forked River NJ

Quote:

Originally Posted by mr mctavish

do you think that would cause a loud knocking as opposed to vibration?

Oh yea it could. Inspect the balancer right away.

Nov 2, 2005 | 08:14 AM

mr mctavish

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From: port orange fla.

thanks guys

Nov 2, 2005 | 10:37 AM

jbierschwale

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From: Colorado Springs CO

My balancer did the same thing. The outer ring was completely loose from the hub. The knocking sound is from the outer ring walking back and forth on the hub and hitting the oilpan.

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Nov 2, 2005 | 11:08 AM

jackson

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From: Unreconstructed, South Carolina

Quote:

Originally Posted by jbierschwale

My balancer did the same thing. The outer ring was completely loose from the hub. The knocking sound is from the outer ring walking back and forth on the hub and hitting the oilpan.

That's the likely source of noise ... but if you continue to run it wobbly, it can beat the bearings out/ crack the crank itself.