Unfortunately for me, because the idler pulley mounting bolt was loose ... a noisy serpentine belt does indicate something's wrong with the drive belt system. But the belt may not be the culprit.

This may be due to a faulty drive-belt idler pulley being infiltrated with dirt. Vehicles affected by service bulletin: See More Service Bulletins Corrective action: Dealers will replace the idler ...

These are the three stock idler pulleys on the ’03-’04 Cobra’s accessory drive system ... to put extra tension on the supercharger belt, which helps prevent belt slip and lost boost.

Idler pulleys are used to route the serpentine ... A: No, we do not recommend attempting to drive if your serpentine belt or belt tensioner is not functioning correctly. If you get stuck on ...

However, the idea of a serpentine belt drive system has serious ... We also opted for a new idler and tensioner assembly because the bearings in these pulleys are usually nearly dead.

Owners of some 2007-08 Ford and Lincoln models with 4.6-liter and 5.4-liter engines may complain of a high-pitched hoot or whistle from the accessory drive belt system at ... to grooves forming in the ...