EVRose

I wouldn't either if its not leaking. When I got mine replaced 2 years ago at the dealer there was no mention on the receipt of any seal being replaced.

irok

most aftermarket hb's come with a keyway already cut in them.if you want a double keyway in a balancer you already have get an automotive machine shop to cut you another keyway in it.if ordering order the ATI with a double keyway in it.you can run as many as 4 keyways if you care to.the crank snout will not have to be keyed.that is where your pinning kit comes in to play.simple procedure that you can perform in an hour or so.check my previous posts for information on keying

irok

call ATI tech line for your application at 410 298 4343.your stock belts will be fine.as long as the outer hub of the hb is not moving in or out on the inner hub of the balancer the car will be fine to drive.obviously keep an eye on it.

victorf

Understood where you coming from.

My ATI has key way, but since my motor will not be FI, I installed as was. But if I was after positive captivation, keyway has to be cut onto the crank snout, also rough machine a key, patient hand massage with final bluing in the key to assure interference fit on crank snout but at the same time provide slide mated tight drawn fit for the damper.

Personally not comfortable using over the counter "pinning" kit, simply drill and pound in the dowel(I am not comfortable with any pounding on crack snout). In my past life, doweling was a common practice, but final machined the female bore painstakingly with exact precision per plan spec to enable an exact fit for the dowel. Same with the relationship between key and the two receptacle keyways - final fitup require repetitive bluing in fitting surface to assure sliding drawn fit with no clearance for any movement - process not complete until verified/accepted via third party independent Inspector signature.

Over the years, I have seen my share of improperly installed "Pinning" attempts. Many with failure, then re-pin. Problems other than crank snout ended up with an assortment of misaligned drilled holes but most importantly, at the same time, losing strength integrity.

As for my toy, unless the need warrant my effort.

Dano523

Understand that the inner raceway on the HB rides against that seal, and in time, it will even wear a groove to the race way of the HB/Wear out the seal.

So the reason that you change it, is the new Raceway on the New HB maybe slightly different, and you want the seal to mate in with the new HB inner raceway (read your into a HB replacement at over a Grand, so why not change out the $10 seal when you are in there anyways).

cclive

When they replaced my balancer, the seal was replaced also, along with the bolt. This is the proper way to do it. The seal is easily replaced and it is a very inexpensive part. It should be done because the labor to get everything in and out is very expensive. Do it once, do it right.

EVRose

I wasn't the one "in there" before and won't be this next time either.
When I had mine done the first time I left it up to the mechanic at the dealer to do it right. It never leaked oil past the seal when I got it back so I guess it wasn't in need of being changed then. I will tell them this time to make sure to replace the seal.

cclive

It's the leak that happens 10,000 or 20,000 miles down the road that needs to be avoided...it would be unlikely that the old seal would leak right away. Going back in with $800 worth of labor after a couple of years in order to change a $10 seal is worth avoiding.

windyC6

Does anyone have a pic of the inner raceway on the balancer ? And could someone explain "Positive Captivation" and how it applies here ??

Mybabystingray01

I am new to this forum. I took my 2007 Corvette with 26,000+ miles to the shop for brakes check, they replaced front and back rotor disc that cost me $1571. Then, they test drive it and found out my Harmonic balancer was wobbling. They asked me if I ever heard a whistling noise, which I told them I had (I don't know if I'm using the right terms as I don't really understand whole lot about cars but my brother in law is a mechanic) I let them replaced my Harmonic Balancer and it costs me $1009 including an $89.99 4 wheel alignment. I thought since I have very low mileage car, I shouldn't have to experienced this kind of problems yet but I was wrong. This is my first repair since I bought my car in 2007. My sister said I should have had it serviced even if there was not any obvious problem. Is that true? Btw, I am a female who just love Corvettes who is still learning.

Tom Gilfoy

For what it's worth when I bought the car used with 40,000 miles I checked all the problem areas on my c6,sticking in park,pully wobble etc.everything was fine. Then it started to get stuck in park. I fixed that by tying pack the paw. Then one night the squeek started. I checked and it was the dampener. So not wasting any time I called the local dealer. They wanted $1200+ to put an OEM one back on. I called Corvette Paramedics in south jersey. It took some time to finally get through and I asked them to put a ATI replacement on . So I drove an hour (slowly) down to their shop. The car was there a few days and they called me. They asked me if I mined them driving it in the rain as they had to road test it and it was raining. I said ok and an hour or so later they said the steering wheel was off a little and they recommended it get an alignment. I said ok. I picked it up the next day and drove it home. The car tracks straight no codes, steering feels good and no squeeks. The end result was two new belts,new ATI balancer new bolt, new front seal and an alignment . The cost was $1700. A little expensive but now I won't have to worry about it. And they are a nice bunch of guys. While I was there waiting for my ride back I looked around and they had some nice vette there. One in particular was a 60 ish restored coupe.
Too bad there not closer.

Need A Vette

If it were me, I would go with a TCI Rattler, amazing and they finally have brought the technology to cars!! Google it...you won't be disappointed.