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. When the engine runs, the water pump draws coolant from the radiator and pushes it through the engine block, where it absorbs heat. This heated coolant then flows back to the radiator, where it is cooled down before returning to the engine. A malfunctioning water pump can lead to overheating, which may cause severe engine damage. Regular maintenance and timely replacement of the water pump are essential for vehicle longevity.