I am about to reinstall my harmonic balancer and I have some questions. I have read all of the posts about how to find TDC.

Even though there is no key for the hub, there is a slot in the end of the crank. Can I determine anything about the position of the crank from this slot? In other words, can I line the arrow up with the key so I don't have to go through the exercise of finding TDC?

Another question: I have been getting an oil leak from the front crank seal and I noticed a slight groove worn in the balancer hub. I want to replace it. Does anybody know the part number of the hub and will there be any problems with vibration if I do this?

Jeff

 

Anybody?

 

Is the key cut-out in the crank shaft in line with TDC? Anybody?

 

The crank key is not inline with #1 TDC on mine.

 

Thanks for your reply. Do you know if it is in a known location so I can determine where to put the pointer on the balancer in relation to the slot?

Your help is much appreciated!

 

Location

 

Shoebox,
Thanks! That is exactly what I was looking for. If I understand correctly, I just need to make sure the keyway is at 1:30 (45 degrees) and the crank gear (dot) will be at 12:00 (0 degrees) and I can put the harmonic balancer on with the pointer arrow facing 12:00 (0 degrees)?

Is that right?

If I could ask you one more question... There is a small groove worn in the balancer hub so I ordered a new hub from Jason Cromer. If I replace the hub only and keep the position of the balancer the same as original, would you expect much of a vibration problem?

Jeff

 

Why would you expect vibration from replacing the hub? The device on the front of the crank isn't a "balancer".... its a torsional "damper". Getting it back at TDC isn't even important. The hub has such tiny mass, and is so close to the center of the crankshaft that any minor imbalance in the hub (if it existed) would not have any affect at all on vibration.

 

Yes
You should be ok as Fred said.

 

Cool,

Thanks guys. I am putting it back together tonight. I see there are a lot of drill marks on the balancer (damper) where it was originally banaced with the crank. That's why I asked. Injuneer, your point is valid about the moment arm of the hub being so small that replacing it should not have much affect. Just wanted to check with you guys who have the practical experience in these areas

Thanks again.

Jeff