It’ll make a whining sound that some describe as harmonious buzzing that is how to tell if water pump is bad. This noise is also caused by worn comportments inside the water pump’s motor. 5. Brume: Still, it’s a sign that commodity serious has gone wrong with your auto. Suppose you see a brume jutting out from underneath your hood. When a water pump entirely fails, it’s no longer.

Coolant Leaks. Coolant leaks from the water pump are common and a clear sign that it's time to replace the pump. The coolant is stored inside the water pump using a series of gaskets and seals. Once these parts wear out, loosen, or crack, you'll end up with radiator fluid leaking out of the front of your car toward the center.