A undesirable water pump can be a cause for concern to numerous car owners and so in today's article, we are going to look at the signs of a negative water pump. In short, the water pump guarantees the coolant keeps moving via the engine block, radiator, and hoses to aid keep a correct operating temperature. Shao's Water Pump with gaskets. Pick applications offer AISIN water pumps with housing. A Bosch Auxiliary Water Pump supplies the pumping strength essential to circulate a car's coolant.