C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Harmonic Balancer Issue? (Video)

Thread Tools
 
Search this Thread
 
Old Apr 4, 2016 | 07:46 PM
  #1  
s2kvince's Avatar
s2kvince
Thread Starter
Instructor
 
Joined: Aug 2009
Posts: 106
Likes: 1
From: Texas
Default Harmonic Balancer Issue? (Video)

I've been dealing with a squeak that I'm assuming is related to the harmonic balancer. I removed the main drive belt and it did not change the noise level. There seems to be noticeable wobble, but I've seen some posts where people consider this to be normal.

Should I try changing the AC drive belt or just go ahead and deal with the repair cost of the balancer? Is it a difficult job where I need to ensure I use a factory certified technician or is it just time-intensive?

What's a good, reasonably-priced aftermarket option?

Thanks



https://www.youtube.com/watch?v=EWVI...ature=youtu.be

Last edited by s2kvince; Apr 4, 2016 at 07:47 PM.
Reply
Old Apr 4, 2016 | 09:38 PM
  #2  
schpenxel's Avatar
schpenxel
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Default

Remove AC belt and see if the noise goes away.
Reply
Old Apr 4, 2016 | 10:12 PM
  #3  
HBsurfer's Avatar
HBsurfer
Le Mans Master
10 Year Member
 
Joined: Feb 2014
Posts: 5,463
Likes: 1,138
From: Chino CA
Default

If you removed the main belt and the noise did not go away, the balancer is not causing the noise. Good chance it is the tensioner pulley on the a/c.

The people who say a wobbling HB is normal are the LS owners who have a little wobble and choose to "keep an eye on it". We are all stuck with an inferior design there and it is an expensive repair. A new balancer will cost anywhere from $200 to $450 and labor to install will be 6-8 hours.
Reply
Old Apr 4, 2016 | 10:35 PM
  #4  
s2kvince's Avatar
s2kvince
Thread Starter
Instructor
 
Joined: Aug 2009
Posts: 106
Likes: 1
From: Texas
Default

Thanks, I will try that. I just bought the car last week, so I'm not itching to drop $1000+ on a repair if I can get rid of the noise and just keep an eye on the balancer.
Reply
Old Apr 5, 2016 | 07:43 AM
  #5  
BullittEV's Avatar
BullittEV
Pro
Veteran: Marine Corps
10 Year Member
Liked
 
Joined: Nov 2014
Posts: 537
Likes: 44
From: San Diego/Pacific Beach CA
Default

does the squeak go away after the engine has been running?
Reply
Old Apr 6, 2016 | 09:50 PM
  #6  
05 Wreck's Avatar
05 Wreck
Burning Brakes
 
Joined: Oct 2014
Posts: 1,161
Likes: 84
From: Ohio
Default

With the engine running, spray (one at a time) the ribbed area of both belts with alittle WD40. If it's the belts you'll notice right away.
Reply
Old Apr 6, 2016 | 10:48 PM
  #7  
Not So Fast's Avatar
Not So Fast
Le Mans Master
 
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
Default

Does seem to have a pretty bad wobble
NSF
Reply
Old Apr 22, 2016 | 11:31 AM
  #8  
s2kvince's Avatar
s2kvince
Thread Starter
Instructor
 
Joined: Aug 2009
Posts: 106
Likes: 1
From: Texas
Default

I swapped both belts and gave it a few weeks, but it's still running quiet. It's not driven very often, so I might hear the dreaded chirp eventually, but so far, so good. Based on the labor costs, I'll just keep an eye on the balancer for now unless the chirp returns.

Last edited by s2kvince; Apr 22, 2016 at 11:32 AM.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
Old Sep 16, 2016 | 11:36 AM
  #9  
schpenxel's Avatar
schpenxel
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Default

I prefer grease on mine
Reply
Old Sep 16, 2016 | 11:38 AM
  #10  
Not So Fast's Avatar
Not So Fast
Le Mans Master
 
Joined: Sep 2014
Posts: 7,001
Likes: 988
From: lake havasu city arizona
Default

Originally Posted by ahzuz
isn't it bad to spray belts with wd40!?
yes
Reply
Old Sep 16, 2016 | 12:34 PM
  #11  
05 Wreck's Avatar
05 Wreck
Burning Brakes
 
Joined: Oct 2014
Posts: 1,161
Likes: 84
From: Ohio
Default

Originally Posted by Ahzuz
Isn't it bad to spray belts with wd40!?
Just a squirt, don't saturate. WD40 will evaporate with heat in just a few revolutions. If it's the belt, the chirping will go away immediately and return when the WD40 evaporates.
Reply
Old Sep 16, 2016 | 12:51 PM
  #12  
extrapilot's Avatar
extrapilot
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2013
Posts: 2,232
Likes: 315
From: Bridgewater New Jersey
Default

Get your garden hose out, water should temporally take the squeak out for a bit or at least change the pitch of the noise.
Reply
Old Sep 17, 2016 | 10:05 PM
  #13  
95BLKVette's Avatar
95BLKVette
Drifting
20 Year Member
 
Joined: Nov 1999
Posts: 1,502
Likes: 12
From: Yorktown Heights NY
Default

I replaced the harmonic damper pulley on my 99 C5 last year and it had exactly the same symptoms. The replacement requires removal of the steering rack which is the biggest challenge in my opinion. C5's and 6's are known for this problem and yours is getting to the point that you will get stuck somewhere when the rubber totally separates entirely from between the pulley and inner race....then your car dies on the side of the road.
It's about an 8 hour repair as I recall....I have video and photos of it
Reply
Old Sep 18, 2016 | 12:35 PM
  #14  
CMY SIX's Avatar
CMY SIX
Safety Car
 
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
Default

Originally Posted by 95BLKVette
I replaced the harmonic damper pulley on my 99 C5 last year and it had exactly the same symptoms. The replacement requires removal of the steering rack which is the biggest challenge in my opinion. C5's and 6's are known for this problem and yours is getting to the point that you will get stuck somewhere when the rubber totally separates entirely from between the pulley and inner race....then your car dies on the side of the road.
It's about an 8 hour repair as I recall....I have video and photos of it
it was about 3 hours when they did mine, that is normal movement for an HB but the forum engineers will tell you that's about to fail, they have no Idea how it's supposed to work, use a little belt dressing and the squeak will go away, I hope they pop the hood and look at their other cars, they'll be running to the dealer screaming the HB's gonna fail!!!!!

Last edited by CMY SIX; Sep 18, 2016 at 12:40 PM.
Reply
Old Sep 18, 2016 | 04:51 PM
  #15  
TCW's Avatar
TCW
Le Mans Master
Supporting Lifetime
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Jan 2001
Posts: 6,446
Likes: 371
From: Maryville TN
St. Jude Donor '06-13,'16-'17, '19
Default

Originally Posted by CMY SIX
....that is normal movement for an HB but the forum engineers will tell you that's about to fail...
Your HB looks fine!

Tom
Reply
Old Sep 18, 2016 | 09:39 PM
  #16  
Arkyvette's Avatar
Arkyvette
Burning Brakes
 
Joined: Feb 2013
Posts: 1,062
Likes: 28
From: Burkburnett TX
Default

Once the belt starts moving around enough to chirp, it is time to plan out your replacement. It could last another 10 years, or it could fly apart tomorrow. Are you feeling lucky? :-)
Reply

Get notified of new replies

To Harmonic Balancer Issue? (Video)





All times are GMT -4. The time now is 04:43 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE