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 maintains an optimal temperature. When the engine is running, the water pump pulls coolant from the radiator, pushes it through the engine, and returns it back to the radiator for cooling. A malfunctioning water pump can lead to overheating, which may cause severe engine damage. Regular maintenance, including checking for leaks and ensuring proper fluid levels, is essential for the water pump's longevity and the overall health of the vehicle's engine.