The water pump is a crucial component of a car's cooling system. Its primary function is to circulate coolant through the engine, radiator, and heater core, ensuring that the engine operates at an optimal temperature. When the engine runs, the water pump draws coolant from the radiator and pushes it into the engine block, where it absorbs heat. This heated coolant then returns to the radiator to be cooled down. 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 and performance.