harmonic balancer question
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Racer
Joined: Jan 2013
Posts: 300
Likes: 10
harmonic balancer question
I am chasing a noise coming from the front of my engine along with a intermittent vibration passing through at about 1500 rpm . I dont know that the two are related i.e. the noise does not occur when the vibe does. What would you get with a faulty vibe damper? 78 pace car, L-82, alum. heads, 1.6 rockers, duals, headers. I have checked alternator, ac comp., pwr steering pump and it has a new water pump. Noise is a muted squeek on about the same frequency as a lifter noise (its not a lifter).
Melting Slicks
Joined: Apr 2009
Posts: 2,632
Likes: 112
From: Great Plains Iowa
I am chasing a noise coming from the front of my engine along with a intermittent vibration passing through at about 1500 rpm . I dont know that the two are related i.e. the noise does not occur when the vibe does. What would you get with a faulty vibe damper? 78 pace car, L-82, alum. heads, 1.6 rockers, duals, headers. I have checked alternator, ac comp., pwr steering pump and it has a new water pump. Noise is a muted squeek on about the same frequency as a lifter noise (its not a lifter).
The harmonic vibration damper won't cause any vibration or noise as long as its not coming apart. But if its the original I recommend replacing it as soon as possible because sooner or later the outer ring will slip and then the timing mark will move to a retarded position.
Burning Brakes
Joined: Apr 2008
Posts: 1,222
Likes: 93
From: shelbyville West Michigan
maybe check the pulleys...I got a free '68 impala when I was a teen that I restored, guy thought the 327 had a bad main bearing. was knocking and had some vibration from the front of the motor as well. drove it home and the front pulley fell off the balancer. the 3 bolts had gotten loose, warbled out the holes, then sheared completely off flush...at least something to check (could not see it while running, I thought it was a bad bearing too until the pulley fell off). btw, after rebuild and paint, I sold it for a $3,500 profit! (this was '89, before musclecar prices went crazy)
Thread Starter
Racer
Joined: Jan 2013
Posts: 300
Likes: 10
