ATI Balencer removal

[Keith 944]

well that put an end to it for now, I went and placed the wrench under a bench and tried again, this time it broke the bolt off in the balancer, and finished off the puller. grrrrr. can a machine shop get this thing off now?

[Rich Biebel]

Getting the broken bolt out should not be to bad if you don't bugger it up...

The bolts you were using look like poor quality.

Once things start to go wrong and mushroom or deform....it's time to stop and regroup.

We just did a job in our shop that went like this.....

Pull the front of a 6.0 GM engine in a van......Could not get the balancer off until we borrowed a puller made specifically for the new style balancers.

I think your ATI tool was damaged and right there you needed to stop and either fix it or get another one.....

One way or the other you were going to break something it looks like from the pictures. I have seen references to a power tool for pulling balancers but never saw one or used one.......and I would guess not many shops have anything better than that ATI remover.....

[FED 387]

Sure looks like a Grade 5 bolt you need a Grade 8 bolt for sure----when you do get it off check the crank diameter and the inside of the balancer you need to hone the inside of the balancer to provide at least .0001 clearance as well as installing with a very light coat of anti-seize to prevent this. It went on it will come off you just have to work it---- get a good easy out and a LEFT handed drill bit to drill that bolt so you can get the easy out into it correctly ---any good machine shop will have what you need hopefully you can borrow both the bit and the easy out ---FED 387

PS you might get away with using a gear puller if you take your time and go slow

[Rich Biebel]

http://www.atiracing.com/instructions/Super-Damper.pdf

You definitely do NOT want the balancer to be larger than the crank snout. It needs to be a press fit and once it is within the specs ATI recommends it will go on and off without any drama..

Press should be just under .001 meaning the balancer is smaller ID than the crank snouts OD by that amount.

A loose fit or slip fit balancer defeats the purpose and can cause broken parts and the crank and balancer will have metal fretting on their mating surfaces....

[FED 387]

Rich-- I misspoke I meant .0001 smaller than the crankshaft diameter not larger --- thanx for catching my error

[Keith 944]

yes i understand the fit. I did not put this one on. I just have to get it off. the bolts were what came with the puller and I believe it was a grade 5. I thought about going and getting 3 grade 8 bolts but didn't. now I have to deal with what I have. I am thinking I can possibly get the cover off enough to take timing chain off and remove crank and use press to get this thing off. will deff. remove outer hub of balancer. is there something I am overlooking or is this a feasible method?

[Rich Biebel]

No problem and it is good that ATI shows that spec sheet on balancer to crank fit specs.

For years and years we just put them on and never measured anything. Had many instances like Keith is having.

I can tell you for sure that press fit when too much can be a disaster..

I pressed many pistons on rods as we did not use heat. If you went beyond about .001 press on a steel rod with a cast piston you were in the danger zone.....

Heating the rod is a much better way to do that operation.....
I have heated up balancers to try and make it easier.....aluminum mostly...

[gsa612]

You may have a steel hub,the one I have is alum. on a BBC stocker.Here's a link to the install./remove instructions. www.atiracing.com/instructions/Super-Damper.pdf gsa612