ATI Harmonic Balancer: Honing to Fit Stock Crankshaft

[Nxcoupe]

This is how I had to take the one off Krusty's crankshaft...
Great job by my builder.

View attachment 1964131View attachment 1964132

Why?

 

[mmissile]

It wasn't coming off. All 3 bolts snapped in the puller. Sounded like a gunshot, and two hit me in the leg.

 

[GTX JOHN]

Did you use them on 440 with stock crank pulley?

Yep.

 

[CrazyBoutRacin]

Thanks for the part number!
I checked Summit ATI Performance Products ATI917470E ATI Super Damper Standard Harmonic Balancers | Summit Racing
No problem with price.
What did you put in keyway to use wheel cylinder hone?
Also, the reviews site problems with the T-40 Torx pulley attaching bolts. I have the socket tool. Did you have any issues with these bolts?

I used a wheel cylinder hone and a little piece of paint stirring stick. Sometimes I had to hone, sometimes I didn’t, across several brands.

 

[a70duster]

I had an older Fluidampener that was a son-of-a-gun to install. I chucked it up in a lathe and genty emory clothed it till it was easier to install.

Roughly 5 minutes of total run time on the lathe.

 

[dvw]

I read the directions. Thanks!
So the ATI Damper is shipped disassembled? I don't understand why.
Can I just order this with the damper and be OK? ATI Performance Products ATI918997 ATI Harmonic Balancer T-40 Plus Torx Bits | Summit Racing

Yes, this is the correct tool. We use The Sunnen rod hone to size them. Then you know the hole is round and straight.
Doug

 

[Cranky]

In the old days you got a Mopar balancer and it fit. How simple. The spec was .0005"-.0015" interference fit and everything was fine. ATI is supposed to be the best so I use them. I think they make them too small, then you can't return them because they don't fit. They just tell you to hone it. ATI calls for .0007"-.0009" interference fit. You have to have some pretty good measuring equipment for that. And even if you know someone with a Sunnen hone, the keyway mandrel to do it costs $500. Nothings easy nowadays. I prefer the 1970's.

Man, .0015" is pretty tight for a fit of that size....I know a balancer/dampener is supposed to be tight in order for it to work like it's supposed to but.....

 

[DeltaV]

Ok, I'm going to be _that_ guy...put the damper in your oven set at 130*F and leave it there for an hour or more. Meanwhile, chill down the crank with ice packs.

Silicone kitchen mittens work great...you won't feel the heat.

 

[Bird 426]

I used that technique to install a new ring gear on the aluminum flywheel on my airplane. Here's the but, I had to cut and split the old ring off with a chisel.

 

[LSS&B]

Ok, I'm going to be _that_ guy...put the damper in your oven set at 130*F and leave it there for an hour or more. Meanwhile, chill down the crank with ice packs.

Silicone kitchen mittens work great...you won't feel the heat.

Why wouldn't that damage the cushioning material between the inner and outer parts of the harmonic balancer?

 

[DeltaV]

Why wouldn't that damage the cushioning material between the inner and outer parts of the harmonic balancer?

The crankshaft is exposed to 200+ deg F oil and heat conduction out through crank is still going to be quite high by the time it reaches the harmonic balancer.

Typical under-the-hood temperatures are pretty dang hot too. Everything is cooking.

 

[dvw]

Ok, I'm going to be _that_ guy...put the damper in your oven set at 130*F and leave it there for an hour or more. Meanwhile, chill down the crank with ice packs.

Silicone kitchen mittens work great...you won't feel the heat.

And how will you remove it later?
Doug

 

[DeltaV]

A high quality puller.

 

[dvw]

A high quality puller.

Read post #20. I used to believe the same way. Until I pressed some parts, not just dampners, That were tighter than they should have been. I knew it, could fell it, and did it anyway. Then struggled to remove that part later. Leaving both the part and the shaft looking very ugly. Do it right the first time.
Doug

 

[LSS&B]

I have not had to hone them in the past number of times.
They are used by a lot of our Stock/SS racers.

I have had crank issues with the fluid units and avoid that style.

Chris Ouellette
BHJ Products Inc.
chris@bhjinc.com | +1(510) 797-6780

Ordered MP-IB-183 is $263.00, plus UPS shipping. In stock. This unit is cast iron. MP-IBB-7 $473 is billet steel, because SFI does not allow cast iron. Necessary for sub-10 second car. Roll cage, slicks. Not necessary for my car, because it’s just hot street.

Grid: every small mark is 2°. Long marks are 10°

Prep with Lacquer thinner on rag. Light rub to remove rust inhibitor. Do not dip into any chemical because might damage rubber compound. Spray with engine paint, otherwise will surface rust.

Thanks, and I hope my experience is same as yours and I don't have to hone.