Ensuring Expertise Built In , the OTR Water Pump has undergone extensive testing to ensure it meets or exceeds OEM performance, including: hub shaft force testing to 1,800 ft-lbs, bearings housing force testing to 1,500 ft-lbs, and impeller/shaft press fit torque testing to 200 in-lbs. In addition, the core and surface are Rockwell hardness tested, and careful leak testing serves to ensure 100% leak-free protection. The OTR water pump replacement is made for the most demanding, heavy duty engine cooling needs. We take engine overheating seriously; with OTR water pumps boasting hardware including OE specified bearings, unitized seals, high quality gaskets, and accessories to ensure proper fit, form, and function. This heavy duty water pump design delivers safety and reliability while boosting your truck engine's temperature maintenance. FleetPride is your First Click in Heavy Duty .