How To Fix A Engine Belt || Belt squeal, squeaky belt, belt noise? Learn how to fix a squeaky belt in your car. Usually the belt noise comes from the belt tensioner pulley, idler pulley, or the belt itself. The serpentine belt in your car powers the accessories such as air conditioning, power steering, the alternator, fan, and waterpump. There are three types of serpentine belt wear, pilling, glazing, and abrasion. Pulley wear will cause your pulley to squeak. A worn out pulley bearing or a worn