Engine Coolant Standard Water Pump (41185) by Gates®. Material: Cast Aluminum. Rotation: Standard. Gates water pumps are recognized in the industry for their durability and superior quality. Every Gates water pump is constructed with premium alloy materials and a 100% functional test of seals and bearings along with a 100% leakage test for both the casting and assembled water pump. Gates is committed to selling the highest quality new, never remanufactured, water pumps in the aftermarket. Their end goal is to provide the customers with the worry-free operation for the life of their vehicle.