Harmonic Balancer Help
Thread Starter
Intermediate
Joined: Jun 2008
Posts: 41
Likes: 0
From: Sterling Heights Michigan
Harmonic Balancer Help
Looking for some advice, i have a 2007 6.0 with 35000 miles on it and i have already replace all my belts about 10000 miles ago. Yesterday my belts started squeling again and when i was looking at the balancer it seemed to have a little woble, not much. My question is, is it bad or going bad? And if i need to replace it what should i replace it with? I know ATI is good but the cost is a little high. I was thinking more about SLP HB/underdrive? Thanks for the help.
Racer
Joined: Oct 2012
Posts: 262
Likes: 182
I just finished replacing the balancer on my 2006 C6. I went with the ATI part. I know it's expensive, but ATI sometimes sells BLEMs (cosmetic blemishes only. They are brand new and fully functional) of their balancers on eBay for much cheaper. Right now they are selling one that would work for you for $220 instead of $430 or so. Check it out.
http://www.ebay.com/itm/191026705557
http://www.ebay.com/itm/191026705557
Instructor
Joined: Feb 2013
Posts: 165
Likes: 1
From: La Verne CA
I used an ATI cosmetic blem from Ebay also.
Here is the ARP bolt I ordered when I had mine replaced...
http://www.ebay.com/itm/ARP-234-2503-Crank-Harmonic-Balancer-Bolt-LS1-LS2-LS3-LS6-excludes-LS7-/360824778650?pt=Motors_Car_Truck_Parts_Accessories&hash
Here is the ARP bolt I ordered when I had mine replaced...
http://www.ebay.com/itm/ARP-234-2503-Crank-Harmonic-Balancer-Bolt-LS1-LS2-LS3-LS6-excludes-LS7-/360824778650?pt=Motors_Car_Truck_Parts_Accessories&hash
Last edited by lathrash; Jan 10, 2014 at 02:26 PM.
Supporting Vendor
Joined: Sep 2013
Posts: 3,099
Likes: 1,270
From: Harbor City California
The cheap route would be to pick up a Dorman OEM balancer (there only $80-$90 bucks at AZ) and an ARP 234-2503 crank bolt. Good to go.
Also often times switching to a goodyear gator back belt will stop the belt noise. Those Gator back belts are almost impossible to get a sound out of.
Also often times switching to a goodyear gator back belt will stop the belt noise. Those Gator back belts are almost impossible to get a sound out of.
Racer
Joined: Nov 2007
Posts: 260
Likes: 7
From: Aledo TX
I have the Powerbond 25% unit (same as the SLP) on my heads/cam LS2. I pinned the crank and used the ARP bolt when I installed it. Fits great and works great. I replaced the stock unit with this one at the first sign of wobble.
Team Owner
Joined: Sep 2000
Posts: 25,019
Likes: 2,712
From: Far NW 'burbs of Chicago
St. Jude Donor '13
A little wobble is normal, because the only parts on the stock balancer that are precisely machined are mountings and the groove for the belt. The faces and "inner circle" can have wobble that doesn't mean anything, but of course they are the part you can see and will help you notice that things need checking.
There is a GM bulletin that calls for removing the belt and using a dial indicator to check the runout in the belt groove, but I don't have a copy available.
There is a GM bulletin that calls for removing the belt and using a dial indicator to check the runout in the belt groove, but I don't have a copy available.
Melting Slicks
Joined: Oct 2010
Posts: 2,220
Likes: 16
From: Sugarhill Ga
some movement is normal, i would take the belts off, spin all the pulleys and see if any feel rough or make noise.
if you decide on a pulley an UD is FREE power. I have an SLP on my C5 and a Powerbond on my C6 (both pinned with GM bolt)
the only thing GY makes thats worth a damn are belts. Try a couple.
if you decide on a pulley an UD is FREE power. I have an SLP on my C5 and a Powerbond on my C6 (both pinned with GM bolt)
the only thing GY makes thats worth a damn are belts. Try a couple.
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Team Owner
Joined: Sep 2000
Posts: 25,019
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
To me, the small increase in power does not seem to justify the potential problems. GM built the system like they did, after a lot of testing. I'm sure they would have been happy to brag about more HP and better MPG, if they thought it was a good idea.
Team Owner
Joined: Apr 2008
Posts: 31,800
Likes: 2,396
From: Middle TN by way of KY, OH, VA, IL, CA, FL, NY, SC, HI
I just finished replacing the balancer on my 2006 C6. I went with the ATI part. I know it's expensive, but ATI sometimes sells BLEMs (cosmetic blemishes only. They are brand new and fully functional) of their balancers on eBay for much cheaper. Right now they are selling one that would work for you for $220 instead of $430 or so. Check it out.
http://www.ebay.com/itm/191026705557
http://www.ebay.com/itm/191026705557
I have putting off this replacement, now I will move forward.
Thread Starter
Intermediate
Joined: Jun 2008
Posts: 41
Likes: 0
From: Sterling Heights Michigan
Thanks to everyone for all the good help and advice. I am definitely going with new gatorbelts this week for a start. And while I am doing that i will check the wobbly with the belts off. As for the ATI if they are still available the end of the month, I try will get one for that price. Thanks again.
Racer
Joined: Dec 2012
Posts: 426
Likes: 0
From: West Palm Beach Florida
Mine started to have a slight wobble at 47k miles, gradually got worse. Started chirping and then finally a steady squeal. I switched to a stock size Powerbond and it's been perfect. If you have ever wanted to do a cam, this is also the time.