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Originally Posted by jerrydirks
Does anyone know if balancincing the rotating mass, flywheel, clutch, how GM approached the balance issue or should the balance be performed while on the engine crankshaft?
Thanks!
Jerry
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No...the lt5 is internally balanced meaning the crank/rods/piston were balanced and the balancer and flywheel were not used for the lt5 balancing. The only way the balancer could become out of balance if it was hit or the motor was removed maybe after rippie originally and the balancer slammed into the cross member...so I doubt the crank balancer is out.
If the pilot bearing went out or was damaged in the rear of the crank and car was driven for a while like that you will get a vibration since the front of the tranny shaft sits in it! I did my clutch in my first 90 zr1 and messed the pilot bearing up and it vibrated bad until I removed the tranny again to put a new pilot bearing in the end of the crank and the vibration was totally gone afterwards!