What does the fan belt in a car do?

Well, it won't keep your pants up, but it does transport power to your vital automotive components. The serpentine belt is one long, snaking, winding belt that keeps your alternator, power steering pump, air conditioning and — in some cases — your water pump running smoothly and effectively.Aug 22, 2016 read more

Best Answer: A true "fan belt" doesn't exist in the vast majority of modern cars. On old (pre-60's) cars, and some newer ones with longitudinal engines (mounted front to back, rather than side to side in the engine bay). They drive the cooling fan for the radiator, sometimes via a viscous clutch. read more

The serpentine belt, also known as the drive belt, is a belt on a car engine that works with the idler, tensioner, and pulleys inside the accessory drive belt system. It provides power for the air conditioning, alternator, power steering, and sometimes the cooling system water pump. read more

If either belt breaks, a car is going to soon come to a halt. Once a timing belt breaks, the engine shuts off and you won't be able to restart it. With many cars, you might be able to restart the engine after a serpentine belt breaks, but you won't get far if it drives the alternator. read more