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 optimal operating temperature. As the engine runs, the water pump moves the coolant from the radiator to the engine, absorbing heat. This process prevents overheating and helps maintain engine efficiency. A failing water pump can lead to serious engine damage, so regular maintenance is essential. Signs of a bad water pump include coolant leaks, unusual noises, and overheating. Drivers should pay attention to these indicators to ensure their vehicle runs smoothly and reliably.