keying the crank?
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TECH Enthusiast
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Joined: May 2005
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From: Brentwood CA
keying the crank? 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
thanks,
Brian
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
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Joined: Aug 2004
Posts: 875
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From: Portland Oregon
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.
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.
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.
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Joined: Jan 2004
Posts: 633
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From: Detroit,MI
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
ATI part number is #ATI-918993
