Originally Posted by
onehundred80
Belt ribs get torn off when the belt is not fully on a pulley, the overhanging rib is sliced off.
Absolutely correct. I suspect that may have been the case, though I checked it twice before replacing the fan&shroud. Nice thing is, the new belt showed up today as expected.
Put on, and checked each pulley 3 times before buttoning things up. This time, no problems.