1990 Chevrolet S10 Q&A

1990 Chevrolet S10 Question: How do I know when to replace the idler pully?

the serpentine belt came loose from the assembly but did not break. I found the doughnut shaped pully had fallen off from the bearing race. It was laying down under the radiator fan. Are there two pieces or did something break? -
Answer 1
Sounds like the tensioner just came apart and needs to be replaced. Probably a good idea to replace the belt also. Hope this helps -