Water Pump

Water Pump Shaft Cummins Engine V6-378

It is the internal shaft that connects the rotating components of the water pump—specifically, the drive assembly/pulley to the impeller. It rotates on the pump’s bearings and transfers the rotation to the impeller, allowing coolant to circulate through the engine.

Powered by Cummins V6-378 engines

Some catalogs also list it for Cummins V/VT378, V/VT504, and V504 engines. It is not appropriate to assign a universal age range to this part: these engines have been used in many industrial, marine, generator, and vehicle applications, and Cummins typically identifies definitive compatibility using the Engine Serial Number (ESN) and CPL, not simply by year or model.