J3TVETTE

You may want to consider another mechanic as well. It is weird for them to be going out in under 1000 miles.

simplegto

Not if he installs it with a B.F.Hammer.

5knives

I just had my tuner place an order for an ATI damper. I had a 402 installed in my C6 and during the build, the tuner noticed my double roller timing chain had locked up and was probably about to go. I did a bunch of research on broken timing chains and ASP underdrive pulleys seemed to be a common theme. Whether they were directly the cause of broken chains I can't say. But the statistics were enough for me to ditch my ASP and go with the proven and popular ATI. If you're questioning your stock balancer, I'd swap in an ATI.

TXBossJ

My mechanic installed a Summit Racing Harmonic Balancer. It seems to be running pretty smooth now.

I kind of live out in the country and there is no telling how long the OEM HB's were sitting on the Chevy dealership shelves.

I'll post in another 1k miles or if it breaks again.

Thanks for the input.

samzvetc6

I'm about to replace my HB with a PowerBond PB1117N. Any long term experience with this one?

drew_c6

A lot of people around here swear by them, but I don't think there's a whole lot of data on how long and how hard people are driving once they swap one in. Personally, I wouldn't trust it or any other brand part that utilizes that same OEM design.

samzvetc6

After talking to my mechanic, I am going to return the 1117N and buy the 1117SS. The peace of mind is worth the extra bucks and I don't want to have to replace the HB again.

samzvetc6

Does anyone have information about tje washer that goes between the HB and the block?

GARYFINN

breeznbyou

spot on,knew of one that over time just spun on crank,motor ran nothing else turned,gm does some fudged up stuff,waiting on my fluidampr now,going with them

drew_c6

Mine did this. First indication something was wrong was lost oil pressure on highway. Shut the car down and trailered it home; when I went to replace the oil pump, the balancer came right off without a puller and I found the balancer and crankshaft was chewed to hell.

Car has been sitting in jackstands for two years now until I can find someone to help me try and rebuild the motor or until I can afford to take it to have it rebuilt or replaced. Upside is I just paid it off a few months ago.

Bearman71

I might have the record.


5 total failures 2 needing a tow.


On failure 2 I think the balancer failed in such a catastrophic manner it took out my tensioner and a few pullies

Water pump exploded the next week "totally unrelated"

On failure 5 which was the dealerships fault the bolt holding the pully on backed out....on the way home from picking up the car from failure #4.

This wrecked the crank hard enough that they had to pull the engine and replace the crank.


Since then I have not had a single failure and am led to believe that there was nothing wrong with the oem balancers but infact it was a fault on the cranks.


Thank God for that extended warranty lol.

bluester

Looks like it's a major LS1 problem, too, Bunch of "How to" video's on Youtube.

ralo90

Oh, so YOU are the one with the extended warranty about to expire. I think they have our numbers mixed up.

Bearman71

Ahahaha my 2007 still has a few years left, that warranty company got big burned.