I think it'* my SC pulley. Is that a coupler or the bearings in the pulley? Time to get my new pulley?? I know it'* not my alternator, and not sure if it'* the idler. I guess I'll find out when I change the SC pulley. My question is, will there be a problem running it like this for a while??

I dont' see how the SC pulley would squeal, it doesn't move in relation to what it is mounted to. I can see it being the tension pulley or the front SC bearings. Hopefully it'* the tension pulley, in that case, get the oversized pulley from ZZP, it'll stop the squealing and help with belt wrap around the smaller pulley.

I agree. But I don't think the nosedrive bearings would do this, either. You'd hear a grinding type of noise, if anything.

I'm betting on the idler. Get the ZZP.

Awesome, thanks...I'm betting on the idler/tensioner as well...