Dorman 300-939 Engine Water Pump Pulley

Engine Water Pump Pulley for Cadillac V8 Applications

Dorman 300-939 is a standard replacement engine water pump pulley built for specific Cadillac applications. It restores the original pulley mounting and belt-running function on select DeVille, Eldorado, Seville, Fleetwood, and Allante models from 1985 through 1995.

Made from steel with a black finish, this serpentine pulley uses a bolt-on attachment style and a 3-bolt hole pattern. The 5.16 in. diameter, 4.23 in. width, and 1.16 in. depth match the listed application requirements for a direct-fit water pump pulley replacement.

Key Features

• Direct replacement engine water pump pulley for select Cadillac vehicles
• Steel construction with black housing color
• Serpentine pulley design for serpentine belt systems
• Bolt-on attachment type with 3 bolt holes
• Standard replacement grade for OE-style fitment
• Part number 300-939 for ordering and cross-reference
• Interchanges with 1627356

Detailed Description

Dorman 300-939 is engineered as a direct replacement for the original engine water pump pulley on specific Cadillac DeVille, Eldorado, Seville, Fleetwood, and Allante models. It is designed for vehicles that use a serpentine belt setup and a bolt-on pulley attachment, helping maintain proper belt routing and water pump drive operation. The steel construction and standard replacement dimensions support a factory-style installation on the listed applications. If you are sourcing a Cadillac water pump pulley replacement, Dorman 300-939 provides a fit-focused solution for the covered model years.

This part cross-references 1627356 for the same application.

What This Part Helps Address

• Damaged or bent water pump pulley
• Wobble or misalignment at the water pump drive
• Belt tracking issues on serpentine systems
• Noise caused by a worn pulley surface or mounting issue
• Loss of proper pulley function on the water pump assembly

Installation Notes and Tips

Verify the vehicle’s pulley style, bolt pattern, and serpentine belt configuration before installation. Confirm the 5.16 in. diameter and 3-bolt attachment layout against the original part to ensure correct fitment. Installation instructions are not included, so use service information for the specific Cadillac application. Part number 300-939 should be matched to the vehicle’s year, make, and model before ordering.

Quality Assurance

Dorman manufactures this pulley as a standard replacement component for the listed Cadillac applications. The part is built to restore original water pump pulley function on the confirmed fitment range, including 1985-1995 Cadillac DeVille, 1985-1993 Cadillac Eldorado, 1985-1993 Cadillac Seville, 1986-1992 Cadillac Fleetwood, and 1987-1988 Cadillac Allante.