Dorman 902-078 Engine Auxiliary Water Pump

Engine Auxiliary Water Pump for Ford and Lincoln

Dorman 902-078 is an engine auxiliary water pump built to match the original fit and function on specified applications. It is engineered for reliable performance and durability, with a housing made from plastic, rubber, and steel for a black OE-style replacement.

• Direct replacement auxiliary water pump for specified Ford and Lincoln applications
• Clockwise rotation
• Inlet pipe diameter: 0.57 in.; outlet pipe diameter: 0.56 in.
• Mounting hole quantity: 2; mounting hole diameter: 0.4 in.
• Black finish with plastic, rubber, and steel construction
• Package contents: 1 auxiliary water pump

Fitment Details

Compatible with 2002 Ford Thunderbird and 2000-2002 Lincoln LS. This Dorman 902-078 auxiliary water pump is a fitment-based replacement for vehicles using the listed configuration, including the Ford Thunderbird and Lincoln LS applications shown here.

This part cross-references Dayco 89012 for the same application.

What This Pump Helps Address

• Coolant circulation concerns caused by a worn auxiliary pump
• Noisy operation from an aging engine auxiliary water pump
• Leaks related to pump housing wear or seal deterioration
• Temperature control issues tied to reduced coolant flow
• Replacement needs for a failed OE-style auxiliary pump on Ford Thunderbird or Lincoln LS models

Installation Notes and Tips

Verify clockwise rotation, inlet and outlet pipe diameters, and the two-mount-hole layout before installation. This pump does not include a pulley, gasket or seal, or shaft, so confirm the vehicle’s existing service parts and sealing surfaces are in good condition before assembly. Always compare the original unit to Dorman 902-078 and confirm fitment for the specific Ford Thunderbird or Lincoln LS application.

Quality Assurance

Dorman designs this auxiliary water pump to match original fit and function on specified vehicles and to deliver dependable service life in everyday cooling-system use.