Notices
C5 General General C5 Corvette and C5 Z06 Discussion not covered in Tech
Sponsored by:
Sponsored by:

ATI Harmonic Balancer Wobble

Thread Tools
 
Search this Thread
 
Old 03-27-2020, 07:33 PM
  #1  
x88
Drifting
Thread Starter
 
x88's Avatar
 
Member Since: Feb 2009
Location: DFW, TX
Posts: 1,388
Received 73 Likes on 40 Posts

Default ATI Harmonic Balancer Wobble

Has anyone heard of an ATI balancer going bad? It wobbles enough to concern me, but nothing looks loose or sounds off.

A friend of mine is suggesting the apr bolt is loose. I’d hate to take everything apart just to check that bolt.
Old 03-27-2020, 07:51 PM
  #2  
Evil-Twin
Team Owner

 
Evil-Twin's Avatar
 
Member Since: Mar 2001
Location: small town in S.E Pa. PA
Posts: 21,325
Received 3,812 Likes on 1,925 Posts
St. Jude Donor '03-'04

Default

did not have a single failure with the development of the LS1 engine in the 200,000 mile certification.
The following users liked this post:
rjwvetttt (08-07-2020)
Old 03-27-2020, 08:41 PM
  #3  
pjdbm
Drifting
 
pjdbm's Avatar
 
Member Since: Mar 2017
Location: Long Island New York
Posts: 1,356
Received 291 Likes on 228 Posts
Default

I have not read of an ATI failure yet. Maybe take a vid of it and post it here? Did they use a stock bolt or ARP on this?
Old 03-27-2020, 09:21 PM
  #4  
JR-01
Le Mans Master
 
JR-01's Avatar
 
Member Since: Sep 2013
Location: Wisconsin
Posts: 8,900
Received 1,063 Likes on 805 Posts
Default

Sorry, I read the first post wrong.
Old 03-27-2020, 09:25 PM
  #5  
x88
Drifting
Thread Starter
 
x88's Avatar
 
Member Since: Feb 2009
Location: DFW, TX
Posts: 1,388
Received 73 Likes on 40 Posts

Default

Originally Posted by pjdbm
I have not read of an ATI failure yet. Maybe take a vid of it and post it here? Did they use a stock bolt or ARP on this?
ARP bolt
Spoke with the last two owners and it was on there when they bought it so it’s been at least 30k miles since install.
Video barely shows wobble but trust me, it’s very noticeable in person.


Sorry for the short clip. Any larger of a file and it won’t attach. You get the idea.
Attached Files
File Type: mov
FullSizeRender.mov (3.49 MB, 165 views)

Last edited by x88; 03-27-2020 at 09:29 PM.
Old 03-27-2020, 09:43 PM
  #6  
pjdbm
Drifting
 
pjdbm's Avatar
 
Member Since: Mar 2017
Location: Long Island New York
Posts: 1,356
Received 291 Likes on 228 Posts
Default

It's hard to tell by the vid, and I am sure you are concerned. I see at least a 1/2 inch space between the balancer & the rack and the belt seems to be lined up with the wear mark in the tensioner.
If you are saying and seeing a bad wobble, the only thing you can do is replace it. You will be removing the rack and you want to get it right. You have to remove the rack just to check the torgue on this @ 245 ft lbs
Old 03-28-2020, 12:09 AM
  #7  
x88
Drifting
Thread Starter
 
x88's Avatar
 
Member Since: Feb 2009
Location: DFW, TX
Posts: 1,388
Received 73 Likes on 40 Posts

Default

Originally Posted by pjdbm
It's hard to tell by the vid, and I am sure you are concerned. I see at least a 1/2 inch space between the balancer & the rack and the belt seems to be lined up with the wear mark in the tensioner.
If you are saying and seeing a bad wobble, the only thing you can do is replace it. You will be removing the rack and you want to get it right. You have to remove the rack just to check the torgue on this @ 245 ft lbs
Yup it all lines up perfectly. There is a gap, but it looks necessary. I took the belts off to see if I can move the pulley at all but it’s totally solid, so at the very least, it’s not coming apart right now. I compared it to my c6 to confirm the wobble is certainly not present on there.

Maybe I’ll hold off messing with this anymore for now as it doesn’t seem to be causing any issues.
Old 08-07-2020, 02:15 PM
  #8  
LoveMyVette4Ever
Cruising
 
LoveMyVette4Ever's Avatar
 
Member Since: Jun 2020
Posts: 10
Likes: 0
Received 0 Likes on 0 Posts
Default

My factory balancer was wobbling, so I'm replacing my harmonic balancer today. I choose a Fluidampr.
Not a fan of old school rubber bond between two chunks of metal.
I like that Fluidampr provides a different way to solve the problem and that the outer case is all one piece.
I have a 2006, Z51, with 6 speed automatic.
Old 08-07-2020, 05:46 PM
  #9  
zeevette
Race Director
 
zeevette's Avatar
 
Member Since: Sep 2005
Location: Pasco WA
Posts: 10,807
Received 288 Likes on 235 Posts

Default

Next time you have to mess with the thing, just pin it to the crank, oh, and don't use a stock replacement pulley.
Old 08-07-2020, 06:26 PM
  #10  
Fast one
Safety Car
 
Fast one's Avatar
 
Member Since: Jan 2001
Location: Hilton NY
Posts: 4,220
Received 348 Likes on 220 Posts

Default

Ask ATI if the wobble means it needs a rebuild.

Get notified of new replies

To ATI Harmonic Balancer Wobble




Quick Reply: ATI Harmonic Balancer Wobble



All times are GMT -4. The time now is 10:49 AM.