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, pushes it through the engine block, and returns it to the radiator to dissipate heat. A malfunctioning water pump can lead to engine overheating, which can cause severe damage. Regular maintenance, including checking for leaks and ensuring proper operation, is essential for the longevity of the water pump and overall engine health.