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, preventing overheating. When the engine runs, the water pump draws coolant from the radiator, pushes it through the engine block, and then returns it to the radiator for cooling. A malfunctioning water pump can lead to severe engine damage due to overheating. Signs of a failing water pump include coolant leaks, unusual noises, and engine temperature fluctuations. Regular maintenance and timely replacement are essential to ensure the water pump operates efficiently, keeping the engine at an optimal temperature.