US Motor Works US5057 Engine Water Pump

Engine Water Pump for Chevrolet and Pontiac Applications

US Motor Works US5057 is an engine water pump for select Chevrolet and Pontiac vehicles from 1991 through 2012. It is built for cooling-system service where a direct-fit replacement is needed, and it includes installation sealing devices for the repair.

• Engine water pump for cooling-system replacement
• Includes installation sealing devices
• Direct-fit coverage for select Chevrolet Chevy, Chevy Monza, Chevy Pickup, Pontiac LeMans, and Pontiac Optima applications
• Cross-reference: Carlson 41080
• Part number: US5057

Fitment Coverage

• Fits 1994-2012 Chevrolet Chevy, N/A
• Fits 2003 Chevrolet Chevy Monza, N/A
• Fits 1999-2003 Chevrolet Chevy Pickup, N/A
• Fits 1991-1993 Pontiac LeMans, N/A
• Fits 1991 Pontiac Optima, N/A

Detailed Description

US Motor Works US5057 is an engine water pump for cooling-system repair on select Chevrolet Chevy, Chevy Monza, Chevy Pickup, Pontiac LeMans, and Pontiac Optima models. This pump is intended for vehicles across the 1991-2012 model years listed in the fitment data, making it a practical replacement when restoring coolant circulation and maintaining proper engine operating temperature. The included installation sealing devices support a cleaner sealing interface during service. Part number US5057 is also referenced by aftermarket numbers such as AW5057 and WP-9376 for the same application.

Common Repair Symptoms

• Coolant leakage at the pump housing
• Overheating caused by reduced coolant flow
• Noise from a worn pump bearing or impeller assembly
• Visible seepage around the cooling-system mounting surface
• Temperature fluctuations during normal driving

Installation Notes and Tips

Drain the cooling system before removal, clean the mounting surface thoroughly, and inspect the belt drive, hoses, and thermostat while the pump is out. Follow the vehicle service procedure for torque sequence and coolant refill, and verify there are no leaks after the engine reaches operating temperature.

Quality Assurance

US Motor Works supplies cooling-system components for replacement service, and this water pump is packaged with installation sealing devices to support proper sealing during installation.