The water pump in your Cummins diesel engine is designed to push coolant from the radiator through the entire coolant system. The engine's coolant travels from the engine to the radiator where the temperature of the fluid is reduced by the air passing over the radiator. The water pump is called upon to create a flow of the coolant through the engine (the heat source) where it can pick up excess heat and transport it to the radiator (heat exchanger). Then, the radiator (the heat sink) transfers the heat to the air, all with the least amount of power loss from the engine. We have large stock of cummins water pump for different Cummins Engine Model, such as: NT855, KTA19, KTA38, KTA50, 6BT, 4BT, 6CT, QSL, QSB6.7, ISF, ISF2.8, ISF3.8, QSM11, ISM, ISX, QST, ISL, QSL can meet all your requirements for engine repair