Kinda scary to think aftermarket companies put in such little effort to design products. They release products and endanger people's cars.

Anyways, the only reason I went with Code 3's s/c pulley over a crank pulley is because the crank pulley is the most specially designed part of every modern engine. It balances and dampens the entire internal engine and, in this case, can make or break the belt system. And as we see here - its a break!

Also, if a belt is hanging off a pulley then it is causing an angular pressure on the pulley and the bearing. Maybe this explains some of the tensioner pulley bearing issues.

I've been messing with some pulleys this week for a completely different reason, testing some ideas, but as soon as I saw the belt moved 1-2mm off a pulley I ran to the driver's side and shut the car off. Never drive with a belt hanging off!