Harmonic Balancer Issue
Thread Starter
Pro
Joined: Oct 2014
Posts: 512
Likes: 25
From: Ashland KY
Harmonic Balancer Issue
Guys, I have an 07 with 24K on it, and I have the slightest wobble on the harmonic balancer. It runs great but with all the horror stories on here about LS2 HB issues, I was worried. Should I wait to see if it gets worse, or have someone look at it, before it does? Thanks in advance for the advice.
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
Guys, I have an 07 with 24K on it, and I have the slightest wobble on the harmonic balancer. It runs great but with all the horror stories on here about LS2 HB issues, I was worried. Should I wait to see if it gets worse, or have someone look at it, before it does? Thanks in advance for the advice.
Team Owner
Joined: Sep 2000
Posts: 25,029
Likes: 2,719
From: Far NW 'burbs of Chicago
St. Jude Donor '13
We presume you're out of warranty, so anything you do will be on your dime.
Most of the HBs do wobble a bit, ours does but has not noticeably changed in the last 77k miles.
There is a GM bulletin that calls for measuring the runout in the pulley grove, the other faces are not manufactured precisely enough to count. It would probably take a shop something around an hour to find and do the bulletin.
You might do what we have done- compare your car to a few others, if it doesn't look bad and isn't making unusual noises, just keep an eye on it. You want to look at the pulley from the side as much as possible, that's the wobble that matters.
The C5/C6 HBs have been a problem, but many owners never need to replace theirs, which can cost somewhere like $500-$1,000.
Best of luck to you.
EDIT:
VET4LES types faster than me.
Most of the HBs do wobble a bit, ours does but has not noticeably changed in the last 77k miles.
There is a GM bulletin that calls for measuring the runout in the pulley grove, the other faces are not manufactured precisely enough to count. It would probably take a shop something around an hour to find and do the bulletin.
You might do what we have done- compare your car to a few others, if it doesn't look bad and isn't making unusual noises, just keep an eye on it. You want to look at the pulley from the side as much as possible, that's the wobble that matters.
The C5/C6 HBs have been a problem, but many owners never need to replace theirs, which can cost somewhere like $500-$1,000.
Best of luck to you.
EDIT:
VET4LES types faster than me.
Advanced
Joined: Oct 2014
Posts: 86
Likes: 1
From: Pinellas Park Florida
Guys, I have an 07 with 24K on it, and I have the slightest wobble on the harmonic balancer. It runs great but with all the horror stories on here about LS2 HB issues, I was worried. Should I wait to see if it gets worse, or have someone look at it, before it does? Thanks in advance for the advice.
Thread Starter
Pro
Joined: Oct 2014
Posts: 512
Likes: 25
From: Ashland KY
The way they are manufactured makes most of them look like they have a little wobble when in fact the part that matters, the pulley grooves, runs true. My go/no go test is to look at the belt. If it moves the belt and changes the way the belt tracks at the pulley I recommend replacement. If the pulley looks wobbly but the belt doesn't get moved around it's fine.
