What caused this?

[BUIZILLA]

[ QUOTE ]
Hmmmm.... would the balancer slide onto the crank if the key was too 'tall'? I never really thought about it, but....

[/ QUOTE ]actually, the balancer is a snug, virtually press fit so it should NEVER slide right on. I am on my third stock GM LT1 balancer on Mighty Mouse, but mine spins on the outer shell, I have now staked the last one, and it is holding up pretty good, granted I have been as high as 8,400 rpm, 8,000 plenty of times, and shift it at 7,200-7,400 so a stock balancer is NOT happy with my methods LOL I have broken 2 ATI balancers on my Buick like yours, and that was because they were too loose on the crank snout.

JH

[Mr70]

This may be the work of the dreaded two footed,frustrated,Pennsylvania garage gremlin.
.................................

[Xplantdad]

I might as well get some use (mileage) out of my screen capture...don't you think?

[Kim_Howie]

Staking the balancer. The outer ring and inter ring together, haven't you lost the reason for the balancer??