The purpose of the engine’s cooling system is to dissipate heat. The function of the water pump is to allow coolant to travel through the radiator and engine system to sustain the appropriate engine temperature. Common signs of failure include the engine overheating, leaking coolant, excessive looseness in water pump shaft, or a rumbling noise in the pump. If you have any questions regarding your cooling system call Custom and one of our service advisors would be happy to show or tell you how this system works.