DAN

The front belt drive pulley is two pieces that must be indexed properly before they will snap together completely with no gaps. There is a square drive on the toothed pulley and a mating square pocket on the pulley flange that absolutely must mesh together otherwise when you tighten the clicker nut completely the front assembly binds. When you loosen the clicker nut the assembly spins free but the pulley its not centered on the belt driveline.

Remove the belt cover and I bet you see a gap between the pulley and the left pulley flange. Fix this and all should be smooth again.