My engine was squealing very loudly, and it was the main engine belt (the longer one). It looked hard to replace, but I just tried it myself (bought the new belt from AutoZone) and after 2 hours, finally got the belt around the pulleys.
Once I started the car, I heard a strange knocking sound coming from the belt area at low RPMs. I then moved the car out of the driveway, and turned on the A/C. It made a weird racket (couldn't hear it that well from inside the car), and now the pulleys no longer turn at all.
1) Any idea what I may have done wrong? I checked, and there is no tension in the belt at the moment (there was after I added the belt).
2) What happens if I drive it without the pulleys turning?
Tuesday, September 18th, 2012 AT 12:49 AM