Hi All: about a 425 i need to pull out the Harmonic Balancer and it looks to me the engine needs to stop rotating in order to remove the nut and washer in the crankshaft, is this correct?, any special guidance for doing this?, if so, why the CSM does not mention this at all in the procedure?. TIA. Raul

 

Here's a recent thread on replacing the harmonic balancer.

https://classicoldsmobile.com/forums...4/#post1683990