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 the engine operates at an optimal temperature. When the engine runs, the water pump pushes the coolant through the engine block, absorbing heat. The heated coolant then flows to the radiator, where it releases heat into the air. A malfunctioning water pump can lead to overheating, which may cause severe engine damage. Regular maintenance, including checking the water pump for leaks and wear, is essential for the longevity and performance of a vehicle.