Replacement water pumps for Peterbilt, Freightliner, Kenworth, Volvo, International, Mack, Western Star, and other semi big rig trucks. Water Pumps will restore proper coolant circulation to the engine. A Water Pump is an integral part of the cooling system and makes to circulate the coolant through engine block water jacket and radiator. Engine heated high-temperature coolant is cooled off through radiator and circulated into engine block water jacket. Water Pump is positioned between engine and radiator and is driven by a belt pulley system, timing belt or fan belt to circulate coolant forcibly.