[CHP2RA]

Hi SPDBRAKE, thanks for the reply. Interesting post on servicing the entire belt drive system. You are correct - no power steering. The alignment is good on all three pulleys. All three are co-planar, as well. When the belt was off yesterday, the water pump & alternator both spun without binding. So, it could be intermittent binding in either the water pump or the alternator. Because the squealing/slipping/chewing only happens at high temperatures, that may be the condition causing the pump or alternator to bind? The tension is as you described. After testing the wider belt yesterday, removed the belt, and the rubber build up appeared on the waterpump pulley, with none on the crankshaft or alternator pulley. An indicator the waterpump is intermittently binding when hot?

My past experience with non-performance waterpumps is when they go it is very loud and rough. This is an Weiand 8210 water pump - wonder if it would behave differently?