525.25.0001 Water Pump compatible with Cummins

What does a water pump do?

A water pump is a centrifugal-type pump in a heavy commercial vehicle engine that continuously circulates coolant between the engine block, cylinder head, radiator, heater core, and oil cooler.

Compatible vehicles and engines

This water pump is engineered for high-performance cooling in heavy commercial vehicle engines, including models from International DURASTAR and WORKSTAR, Freightliner M2 series, and Kenworth T-series. It is also compatible with various bus engines from Thomas Built Buses, Blue Bird, and New Flyer, providing essential thermal management for Cummins ISL9 and L9 engines.

Installation and maintenance

For optimal performance, technicians should inspect the pump during timing belt or alternator belt service. Common indicators for replacement include coolant leaking from the weep hole or abnormal bearing noise. Ensuring correct installation helps maintain stable operating temperatures in heavy-duty applications.

Troubleshooting and replacement

Check the compatibility list to ensure this component matches your specific engine configuration.

OE cross-reference

525.25.0001 (Water Pump Water Pumps) is the equivalent of the Cummins OE numbers. This part directly replaces Cummins OE numbers 3964792, 3973116, 4089952, 4309417, 4376358, 5291443, 5346203, 5579022, 5681293, 6389829.