The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant throughout the engine and radiator, ensuring that the engine operates at an optimal temperature. When the engine runs, the water pump draws coolant from the radiator, pumps it through the engine block, and then returns it to the radiator to dissipate heat. A malfunctioning water pump can lead to engine overheating, resulting in severe damage. Regular maintenance, such as checking for leaks and ensuring proper belt tension, can help prolong the water pump's lifespan and maintain engine health.