Originally Posted by Jason99T/A
What pulley- water pump, alternator, or crank? I thought the fix was the shouldered water pump pulley.
Regardless, I have the new design water pump pulley and alternator bracket being installed this week!
The only pulley that isn't a stock part on the motor when it leaves GM, which means the water circulating pump pulley. Just adding a shoulder will tear up the edge that's in contact with the shoulder but if they machine it so the edge is wider and can shift the mating surface so it matches the other pulley(s) is the best way. If it has a spring-loaded tensioner, making a spacer plate that installs behind the pulley will cure the problem, but longer/different rating bolts will be needed and it may cause bearing failure on the pump because the offset is increased.