How to Determine if a Car Water Pump is Faulty?

[JudahAnn]

Signs of a faulty car water pump: 1. Unstable idle: The water pump is connected via a belt to draw cold water from the radiator to cool the engine. If the car water pump is damaged, it will inevitably affect its rotational resistance. After starting the car, the engine's RPM will fluctuate unstably. When the resistance is very high (often occurring in winter), stalling may occur. 2. Water pump leakage: The most common symptom is coolant leakage, where water stains can be observed at the water pump's vent hole. Coolant is essential to prevent the engine from overheating during high-speed operation. If coolant leaks, it poses a significant issue. At this point, it's necessary to inspect the cooling fan, radiator, and water pump for damage and address any issues promptly. 3. Noise problems: If we hear unusual sounds like a 'grinding' noise (rotational friction sounds), it signals that the car water pump is beginning to fail. Of course, the noise could also be due to internal bearing damage or a loose or detached impeller. Therefore, when noise issues arise, these factors need to be checked one by one.