The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant through the engine and radiator, ensuring that the engine operates at an optimal temperature. As the engine runs, it generates heat, and without effective cooling, it can overheat, leading to severe damage. The water pump is typically driven by the engine's serpentine belt and consists of a rotor and a housing. Regular maintenance, including checking for leaks and ensuring proper function, is essential for the longevity of the engine. A failing water pump can cause overheating and should be addressed promptly to avoid costly repairs.