The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant between the engine and the radiator, ensuring that the engine operates at an optimal temperature. When the engine heats up, the water pump draws coolant from the radiator, sending it through the engine to absorb heat. The heated coolant then returns to the radiator, where it dissipates heat before recirculating. A malfunctioning water pump can lead to engine overheating, resulting in severe damage. Regular maintenance, including checking for leaks and ensuring proper belt tension, is essential for the longevity of the water pump and overall engine health.