The serpentine belt is a very important part of the engine, for those engines that use it. Remember that cars like the Toyota hybrid Synergy Drives do not use serpentine belt, rather many accessories are powered electrically, directly from battery and inverter/converter sources.
The serpentine belt is one part of the engine that does more than one function.
Functions of the serpentine belt
It is used to drive various accessories of the engine through the crankshaft pulley. Accessories that the belt drives are:
1. Water pump
3. Power steering
4. AC compressor
And so on.....
Engine overheat is a condition where the temperature of the engine rises above the normal operating temperature.
Engines have specific ways which their belts are routed from the crankshaft pulley through rollers and belt tensioners to the various engine accessories.
It is very important to get the routing correctly as an error would cause a wrong direction of rotation of the accessories.