Water Pump For Cummins Engine B3.3 QSB3.3 QSB4.5 #3800883 Steel Bare Metal

Water Pump for Cummins B3.3 QSB3.3 QSB4.5

This water pump circulates coolant through the engine block and radiator to keep operating temperatures stable, and it cross-references OEM part number 3800883 for Cummins B3.3, QSB3.3, and QSB4.5 applications.

Overview

This water pump is a direct-fit replacement for Cummins B3.3, QSB3.3, and QSB4.5 engines, moving coolant through the cooling system to prevent overheating during demanding work cycles. Built with a steel housing and bare metal finish, this water pump delivers reliable flow for equipment owners and mechanics performing routine cooling system service. It is a practical choice for anyone replacing a worn or leaking unit on a Cummins engine.

Built For Performance

• Steel housing construction for strength and heat resistance
• Bare metal finish ready for installation out of the box
• Designed to match the mounting and flow characteristics of OEM 3800883
• Sealed bearing assembly to support continuous rotation
• Precision-machined impeller for consistent coolant circulation
• Direct replacement fit for Cummins B3.3, QSB3.3, and QSB4.5 engines

Fits These Machines

• for Cummins B3.3
• for Cummins QSB3.3
• for Cummins QSB4.5

On-The-Job Use

• Routine cooling system service on Cummins-powered equipment
• Replacing a leaking or seized water pump during engine repair
• Preventive maintenance to avoid overheating and downtime
• Engine rebuilds where a fresh coolant pump is required

Specs At A Glance

Good To Know

Q: Is this an original Cummins part? A: No, this is an aftermarket replacement water pump designed to fit Cummins B3.3, QSB3.3, and QSB4.5 engines and cross-reference OEM part number 3800883.

Q: Should I replace the gasket at the same time? A: Yes, it is good practice to install a new gasket and inspect the coolant hoses whenever the water pump is replaced to reduce the risk of leaks.

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