nvmy2000ss

iTrader: (17)

Is keying the crank the same as pining it? I am rebuilding my motor and would like to, what I think is keying the crank while this is being rebuilt. will I need a new or diffrent balancer. Do any of you know where they sell a kit.
thanks,
Brian

smask04C5

iTrader: (1)

Keying the crank requires indexing the crank in a vertical mill and cutting a keyway of specific length and depth for a key. Pinning the crank is an operation in which the damper hub and crankshaft snout are split drilled with a specific drill size, allowing for just enough size and depth for a steel pin to be driven into hole. Both operations prevent hub from rotating on crank, the latter being the most convenient, fine for most applications. You can use a stock pully but i would suggest an ATI, simple process to install hub then drill. I used .1875 steel stock from the machine shop

Michael02hawk

iTrader: (26)

Do either of these processes (keying or pinning) the crank, need or require the engine to be re-balanced?

racecar

I have heard of a ZO6 that spun the balancer and threw the belt when road racing.
I had my engine builder cut the keyway in mine. It works great just like a small block.
Balance should not be a problem, that key is super small, the metal that you remove from the crank is replaced by the key.

vettenuts

iTrader: (4)

Curious for those who have pinned the crank. Have you ever removed the dampener since pinning it, and how do you re-align the pins during re-installation? I was thinking of pinning mine while it was off, but am unsure how to re-install if I ever have to pull it off again.

DONAIMIAN

iTrader: (18)

I belive ATI sells a kit for the LS1 to do this. I saw in the back of an old GM high tech a while ago.

Uthinkso

ATI sells a kit for pinning the crank that comes complete with drill bit, drill bushings, and a collar that slides over the snout of the crank and locks down to provide you a guide when drilling the hole for the pin.

ATI part number is #ATI-918993