harmonic?
Thread Starter
Instructor
Joined: Nov 2015
Posts: 160
Likes: 20
From: Atlanta Georgia
harmonic?
Is this the harmonic going bad or just a belt? It has a wee bit of a wobble, but this chirping will not stop above 1k rpm. We noticed it after doing a hard 2nd and 3rd pull. We also smelled a burnt rubber smell or dead skunk (it is Georgia)
10 sec video of the noise, while looking at the belt:
10 sec video of the noise, while looking at the belt:
Le Mans Master
Joined: Feb 2014
Posts: 5,463
Likes: 1,138
From: Chino CA
I can hardly see any movement in that balancer. Mine was way worse when I replaced it. I think that noise is a bad belt or a pulley going bad. Maybe post another clip with the camera steady but based on that clip the balancer looks fine to me.
Safety Car
Joined: Jul 2009
Posts: 3,755
Likes: 190
From: Baton Rouge LA
St. Jude Donor '14, '16
If you watch closely the chirping happens and the balancer appears to smooth out some.
Run it without the belt and see how much the balancer moves. I'd change the belt if I were changing the balancer anyway so you may as well give it a shot now..but make sure you buy a good one like a gatorback, gates, or ac delco belt.
Run it without the belt and see how much the balancer moves. I'd change the belt if I were changing the balancer anyway so you may as well give it a shot now..but make sure you buy a good one like a gatorback, gates, or ac delco belt.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Sounds like a plastic pulley is out of grease to me, or possibly a bad belt...Take the plastic pulleys off and regrease them.. The wobble you have in your balancer is about the same as mine has (or maybe less) , it should take more wobble then that to have a problem....WW
Last edited by WW7; Mar 6, 2016 at 05:39 AM.
Drifting
Joined: Jul 2011
Posts: 1,821
Likes: 442
From: Boca Raton Florida
Originally Posted by WW7
Sounds like a plastic pulley is out of grease to me, or possibly a bad belt...Take the plastic pulleys off and regrease them.. The wobble you have in your balancer is about the same as mine has (or maybe less) , it should take more wobble then that to have a problem....WW
Team Owner
Joined: Jun 2005
Posts: 46,295
Likes: 2,596
From: Northern, VA
St. Jude Donor '15
"In honor of jpee"
Tell us what it was OP once it gets fixed. 
One of the you tubes after OP's shows a comparo of good and bad HB due to obvious wobble (which most have seen).
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Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
That doesn't look that bad wobble wise to me
Pull the belts off, start the car and make sure the noise goes away
If it does, spin each of the accessories and pullies by hand (engine off, obviously) and see if any of them feel like their bearings are gone.
Pull the belts off, start the car and make sure the noise goes away
If it does, spin each of the accessories and pullies by hand (engine off, obviously) and see if any of them feel like their bearings are gone.
Racer
Joined: Nov 2014
Posts: 418
Likes: 34
From: Kissimmee Florida
St. Jude Donor '16
I've always had luck finding squeaks on pulleys by using some type of lube.Wd40 kroil etc.
I just use the straw equipped with it and lube each pulley bearing by just letting a little come out the end of the straw onto the bolt/bearing area.Till it stops and then I replace that pulley bearing assy.
I just use the straw equipped with it and lube each pulley bearing by just letting a little come out the end of the straw onto the bolt/bearing area.Till it stops and then I replace that pulley bearing assy.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Take the belt off and spin the plastic pulleys to see if they spin freely and if they keep on spinning...If they spin real easy then they're dry and need to be regreased or replaced....Mine had no grease in them at all when I got my car at 78,000 miles..Greasing is cheaper and works just as well as long as the bearings look ok...Just use a high speed , high temp grease for bearings.....WW
Last edited by WW7; Mar 6, 2016 at 01:51 PM.
Race Director
Joined: Mar 2010
Posts: 15,992
Likes: 820
Is this the harmonic going bad or just a belt? It has a wee bit of a wobble, but this chirping will not stop above 1k rpm. We noticed it after doing a hard 2nd and 3rd pull. We also smelled a burnt rubber smell or dead skunk (it is Georgia)
10 sec video of the noise, while looking at the belt:
https://youtu.be/FMZZBht-pbU
10 sec video of the noise, while looking at the belt:
https://youtu.be/FMZZBht-pbU
Thank you for sharing this video, and I’m very sorry to learn that you are experiencing this chirping noise in your vehicle. I see that some other forum members have provided some insight, but we’d be happy to look into this further on our end as well.
Please send us a private message with your full contact info, VIN, current mileage, and preferred GM dealership if you’d like us to provide this additional layer of assistance.
Kindly,
Corey K.
Chevrolet Customer Care
Le Mans Master
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
Hello thehaggis,
Thank you for sharing this video, and I’m very sorry to learn that you are experiencing this chirping noise in your vehicle. I see that some other forum members have provided some insight, but we’d be happy to look into this further on our end as well.
Please send us a private message with your full contact info, VIN, current mileage, and preferred GM dealership if you’d like us to provide this additional layer of assistance.
Kindly,
Corey K.
Chevrolet Customer Care
Thank you for sharing this video, and I’m very sorry to learn that you are experiencing this chirping noise in your vehicle. I see that some other forum members have provided some insight, but we’d be happy to look into this further on our end as well.
Please send us a private message with your full contact info, VIN, current mileage, and preferred GM dealership if you’d like us to provide this additional layer of assistance.
Kindly,
Corey K.
Chevrolet Customer Care
May I please ask with all due respect as to why GM Chevrolet Division doesn't step up to this obvious defect ??? It isn't a new problem. A recall/ customer satisfaction repair letter would be in order if an owner were having this problem don't you think??
It would go a long ways in smoothing ruffled feathers.
I read all the time about the HB going bad and it aint cheap to fix. I know that if mine goes out on a pampered 2011 GS Corvette with only 27,000 mi I would be irate, to the point that Chevrolet would be on my "do not buy" list
Care to comment??
BTW mine does "wobble" but no noise YET!!!
Point; Toyota Highlander V-6 motors was having some problems after we bought ours in 2003, some kind of mechanical problem.
Although ours never had the particular defect they sent out a letter stating that they were aware of the situation and if it were to occur they were extending the power train warranty another 5 years/100,000 MI, confidence is key!!
Thank You NSF
Last edited by Not So Fast; Mar 8, 2016 at 10:56 PM.
Safety Car
Joined: Mar 2000
Posts: 4,395
Likes: 4
From: Anderson, IN
Tell us what it was OP once it gets fixed. One of the you tubes after OP's shows a comparo of good and bad HB due to obvious wobble (which most have seen). https://www.youtube.com/watch?time_c...&v=I4r_2UfSyL0