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, preventing the engine from overheating. The water pump is typically driven by the engine's crankshaft via a belt or chain. As the engine runs, the pump draws coolant from the radiator, pushes it through the engine block, and returns it to the radiator for cooling. A malfunctioning water pump can lead to engine overheating, reduced performance, and potential damage. Regular maintenance, including checking for leaks and ensuring proper belt tension, is essential for optimal performance and longevity of the water pump.