Odd squeal and rattle noise

[EROCK]

After riding this weekend, I noticed a light squeal and rattle noise in the front of the engine. My first thought was belt but I replaced the belt a few years ago with a tread belt and this isn't as loud as a belt. I think its a bearing going bad maybe. Anybody ever have this? Video below.

 

[Chris]

Sounds like a bad pulley you've got there somewhere on the serpentine belt system.

 

[KennethS]

My experience is you can loosen the belt enough to get it off the pulleys, then spin the idlers by hand. Any rough or gritty sounds means the bearing / idler needs to be replaced.

 

[EROCK]

It was this pulley. 30 bucks and 5 mins to change out. Thanks guys!!