Persistent squeak....harmonic balancer?
Pro
Joined: Mar 2011
Posts: 534
Likes: 33
From: Southern cali
the most common chirps are the harmonic balancer and the belt tensioner located on the top front on the passenger side.
if you want to try and find the problem, when the chirp is occurring use some spray lubricant to isolate the offender. I suspect however it is the HB that is going bad.
if you want to try and find the problem, when the chirp is occurring use some spray lubricant to isolate the offender. I suspect however it is the HB that is going bad.
Le Mans Master
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
Let me ask this please, what kind of percentages are we talking about for HB's failing, anyone know or like to guess??
Is there any certain years that are plagued by this than other years, like early C-6 or late models???
Just wondering
nSF
Is there any certain years that are plagued by this than other years, like early C-6 or late models???
Just wondering
nSF
Drifting
Joined: Apr 2013
Posts: 1,352
Likes: 8
From: Jupiter Florida
No accurate percentage will ever be available simply because we will never know about the thousands of owners that got their HB replaced without saying anything to anyone; and you can bet whatever is dear to you, that GM won't care to share these numbers (but trust me, they know all about it).
All that can be said by the sole feedback provided on this board, is that this issue qualifies as a "systemic" failure, and I don't think anyone with reason will invalidate this.
Le Mans Master
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
No year is spared on the C6.
No accurate percentage will ever be available simply because we will never know about the thousands of owners that got their HB replaced without saying anything to anyone; and you can bet whatever is dear to you, that GM won't care to share these numbers (but trust me, they know all about it).
All that can be said by the sole feedback provided on this board, is that this issue qualifies as a "systemic" failure, and I don't think anyone with reason will invalidate this.
No accurate percentage will ever be available simply because we will never know about the thousands of owners that got their HB replaced without saying anything to anyone; and you can bet whatever is dear to you, that GM won't care to share these numbers (but trust me, they know all about it).
All that can be said by the sole feedback provided on this board, is that this issue qualifies as a "systemic" failure, and I don't think anyone with reason will invalidate this.
NSF
Melting Slicks
Joined: Mar 2007
Posts: 2,674
Likes: 38
From: O.C. CA
St. Jude Donor '08
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Drifting
Joined: Feb 2012
Posts: 1,428
Likes: 113
From: Brick NJ
Yes it does sound like the HB. Check for wobble.
And don't feel bad about creating thread # 1019 on the HB going bad... some will STILL tell you that there is nothing systematically wrong with the GM HB.
If you see a wobble on it, throw that piece of garbage in the trash, and install a REAL HB (ATI or Powerbond).
Worth the piece of mind, and I speak from experience looking at my ATI spin true and quiet, after having heard the squealing pig under the hood on cold starts (with the GM trash).
(Or listen to the ones that will tell you there is nothing wrong with a little wobble on the HB, and sing along the chirping birds when you start your car, keeping fingers crossed that the damn thing will not come apart under the hood while spinning at a few thousand RPM)
Good luck!
And don't feel bad about creating thread # 1019 on the HB going bad... some will STILL tell you that there is nothing systematically wrong with the GM HB.
If you see a wobble on it, throw that piece of garbage in the trash, and install a REAL HB (ATI or Powerbond).
Worth the piece of mind, and I speak from experience looking at my ATI spin true and quiet, after having heard the squealing pig under the hood on cold starts (with the GM trash).
(Or listen to the ones that will tell you there is nothing wrong with a little wobble on the HB, and sing along the chirping birds when you start your car, keeping fingers crossed that the damn thing will not come apart under the hood while spinning at a few thousand RPM)
Good luck!
Instructor
Joined: Mar 2015
Posts: 144
Likes: 2
From: Coon Rapids MN
Bought my 05 Z51 last month & thanks to this thread, noticed the HB wobble. Fortunately, the Chevy dealer I bought from includes a Lifetime Powertrain warranty with their Chevy sales. And, the service manager is allowing me to replace the junk GM balancer with a Powerbond. I am purchasing the HB (and a new HB bolt & Serpentine belt) on my own, but they are putting it in for no cost!
I am very happy with this deal! I get a better HB that should be good for the like of the car & don't have to "keep an eye on it" for ever increasing wobble!
I am very happy with this deal! I get a better HB that should be good for the like of the car & don't have to "keep an eye on it" for ever increasing wobble!
Drifting
Joined: Apr 2013
Posts: 1,352
Likes: 8
From: Jupiter Florida
Bought my 05 Z51 last month & thanks to this thread, noticed the HB wobble. Fortunately, the Chevy dealer I bought from includes a Lifetime Powertrain warranty with their Chevy sales. And, the service manager is allowing me to replace the junk GM balancer with a Powerbond. I am purchasing the HB (and a new HB bolt & Serpentine belt) on my own, but they are putting it in for no cost!
I am very happy with this deal! I get a better HB that should be good for the like of the car & don't have to "keep an eye on it" for ever increasing wobble!
I am very happy with this deal! I get a better HB that should be good for the like of the car & don't have to "keep an eye on it" for ever increasing wobble!
2nd Gear
Joined: Mar 2014
Posts: 2
Likes: 0
From: San Ramon CA
Haha so glad I found this thread...my 13 Vert is in having his harmonic balancer replaced as we speak. Just over 36K miles, no track driving, just a little "spirited" street work.
Developed the "chirp of death" about a month ago. Idler pulley was replaced but the crickets decided to stay.
Since it's fully covered by warranty I'm letting them install an OEM unit...this time.
Developed the "chirp of death" about a month ago. Idler pulley was replaced but the crickets decided to stay.
Since it's fully covered by warranty I'm letting them install an OEM unit...this time.
Le Mans Master
Joined: Nov 2014
Posts: 6,185
Likes: 113
From: Texas
Haha so glad I found this thread...my 13 Vert is in having his harmonic balancer replaced as we speak. Just over 36K miles, no track driving, just a little "spirited" street work.
Developed the "chirp of death" about a month ago. Idler pulley was replaced but the crickets decided to stay.
Since it's fully covered by warranty I'm letting them install an OEM unit...this time.
Developed the "chirp of death" about a month ago. Idler pulley was replaced but the crickets decided to stay.
Since it's fully covered by warranty I'm letting them install an OEM unit...this time.
2nd Gear
Joined: Mar 2014
Posts: 2
Likes: 0
From: San Ramon CA
