#3800975 #3285325 3929613 Water Pump For Cummins 6C 6CT 6CTA 8.3L ISC QSC 2300CC

Water Pump for Cummins 6C 6CT 6CTA 8.3L ISC QSC

This water pump replaces OEM cross-reference numbers 3800975, 3285325, and 3929613 to circulate coolant through the engine block and cylinder head on Cummins 6C, 6CT, 6CTA, ISC, and QSC diesel engines.

Overview

This water pump is a direct-fit replacement for Cummins 6C, 6CT, 6CTA, ISC, and QSC diesel engines, delivering the coolant flow needed to keep operating temperatures stable under load. It mounts in the OEM location and accepts the factory pulley and hose connections for a straightforward installation. Engine owners and fleet mechanics choose this water pump when the original unit begins leaking, squealing, or losing flow.

Built For Performance

• Cross-references OEM part numbers 3800975, 3285325, and 3929613 for easy verification
• Sealed bearing assembly supports the shaft under continuous belt tension
• Precision-machined housing for accurate mounting against the block
• Coolant-safe impeller designed for consistent flow at operating RPM
• Fits 8.3L Cummins 6C, 6CT, 6CTA, ISC, and QSC engine families

Fits These Machines

• for Cummins 6C series diesel engines
• for Cummins 6CT and 6CTA series diesel engines
• for Cummins 8.3L ISC engines
• for Cummins QSC engines

On-The-Job Use

• Heavy truck and tractor engine cooling systems
• Construction and agricultural equipment with 8.3L Cummins power
• Marine and industrial diesel engine applications
• Fleet maintenance and coolant system repair

Specs At A Glance

Good To Know

Q: How do I confirm this water pump fits my engine? A: Match the OEM cross-reference numbers 3800975, 3285325, or 3929613 against the part number on your old pump, and verify your engine is a 6C, 6CT, 6CTA, ISC, or QSC 8.3L unit.

Q: Should I replace the thermostat and coolant at the same time? A: It is common practice to refresh the thermostat, gasket, and coolant during a water pump change so the entire cooling circuit starts clean and functions correctly together.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.