Do I need too Change Balancer-bolt when pulling balancer off and replacing Balancer? I know the spec for tightening 37ftp and 120 deg. Any help will be appreciated. Thanks

 

You shouldn't. Oil pump is not keyed to crank it is driven by the clamping force of balancer bolt.

 

Ok so replace bolt from GM dealer. Thanks greatly appreciated

 

 

Ok got the bolt, put it in, but what a tough pull to get 120 degrees on the crank. no leaks, so got the job done! Thank for all the help guys, (from 96 Deville Harmonic Balancer replacement) works for Seville too. Thanks

 

Thanks Slowroll for pointing out; you always replace a stretch bolt after its been tightened once. I am looking forward to reading more post from you, in the future. Thanks again