Water pump is a simple centrifugal pump, pushing the fluid from the pump into the engine, often belt driven from the crankshaft to circulate coolant fluid whenever the engine is running. Common signs of wear include coolant leaks, overheating of the engine, the pulley is loose and making whining sounds, or worst case steam coming from the engine. Perkins water pumps undergo extensive testing to ensure coolant flow and pressures match the engine requirements, and are designed to meet the flow and pressures within the engine using high-quality ceramic cartridge seals and sealed bearings.