I have a friend who runs in a 602 only crate class and he just put the 3rd harmonic balancer on his 602. Twice, the outer ring walked ahead until it touched the water pump pulley and just last night, a brand new balancer had the outer ring go back and start touching the timing cover. He has 3 cars with these motors and it isn't always the same engine doing it. Any ideas out there??? Is there an aftermaket balancer that is the same size, weight, balance, etc. to the stock one available? He just paid $136 from the local GM dealer for the last one so he is a little frustrated. Thanks in advance for your ideas..........
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