Harmonic Balancer

[JSH]

Hi all. Well I have the dreaded wobble of the harmonic balancer on my 99 vert. I picked up the Dayco power bond PB1117SS balancer, race version, an ARP bolt and a new seal. My question is about pinning the crank. This part comes with a slot, for a keyed crank which we do not have. I wrote to Dayco , and said that they have had quite a few questions regarding this, They said the best way is to key the crank, but money talks on that idea. They also said some guys have pinned the balancer to the crank, but ended up scoring the surface of the balancer surface and the end of crank surface so that the balancer did not sit square. Any of you guys pinned your balancers to the crank?

 

[hemicat]

I used the Dayco/PowerBond PB1117N harmonic balancer with the ARP bolt and did not pink the crank.

 

[JSH]

Did that one come with the keyway, and if so did you fill it with ATV?

 

[hemicat]

nope it did not that I can recall

 

[JSH]

Is your motor stock?

 

[hemicat]

ls6 with BTR Stage 2 cam/springs/trunions/pushrods, cr-5 timing chain, melling oil pump, headers, cold air intake, tune...should be close to 405 rwhp

 

[smokindave]

I just drilled and pinned my harmonic balancer.
If you were closer I would lend you the rig for doing the job.
It’s a easy thing to do and there is nothing that can go wrong other than drilling the hole to deep into your main seal.
I put a bit of tape on the drill bit to make sure I didn’t drill to far.
I’ll post a picture of the jig drill bit and reamer in a little while once I get back home.
If you’re putting on a new balancer that’s all the work,once the balancer is mounted is when you bolt up the jig then drill the hole,ream it out with the supplied reamer then pop the pin in then your harmonic balancer bolt...easy peasy and it will never spin.
I actually can’t believe they didn’t put a key way in at the factory as most manufacturers do.
I pinned mine for a supercharger.
It’s a bit of a long job to get to the harmonic balancer,the rack and pinion has to came out.
I’ve done it so many times now I can have the steering rack and harmonic balancer out of the car in less than a hour now.
Any questions I’m home all the time.
Cheers

 

[JSH]

Well Hemicat, that's not stock, and no slippage at all, that is fantastic. I wish I was closer too smokindave, that would be great if I could borrow a jig setup. The car will be going into the shop on the 26TH of this month, but to pin or not to pin that is my dilemma.

 

[JSH]

Hey Hemicat , is the crank stock with no pin?

 

[hemicat]

Hey Hemicat , is the crank stock with no pin?

yep, I used the replacement "N" type balancer without the pin (like the OEM). You have the "SS" part which will accept a pin and good for a supercharger.

 

[Black 03 Z06]

How did I miss this thread.

Great information. Best of luck with your projects.