Dorman 300-931 Engine Water Pump Pulley

Reliable Engine Water Pump Pulley for Buick, Oldsmobile, and Pontiac

The Dorman 300-931 engine water pump pulley is designed to provide dependable performance for select Buick, Oldsmobile, and Pontiac models. Engineered with durable steel construction and a serpentine pulley design, this pulley ensures consistent belt alignment and efficient engine cooling system operation.

• Constructed from high-quality steel for strength and durability
• Black finish for corrosion resistance and long-lasting use
• Five-groove serpentine pulley compatible with serpentine belts
• Bolt-on attachment type with one bolt hole (0.35 inch diameter)
• Dimensions: 4.15 inch diameter, 2.49 inch width, 1.969 inch depth
• Standard replacement grade for reliable fit and function

Durable Design and Precise Fitment

This engine water pump pulley is specifically designed for compatibility with Buick Calais, Oldsmobile Cutlass Calais, Pontiac Grand Am, and Pontiac Skylark models. The pulley’s steel construction provides the necessary strength to withstand engine vibrations and heat exposure. Its black coating helps resist rust and corrosion, extending the service life of the component. The five-groove serpentine design matches the belt type used in these vehicles, ensuring proper belt tracking and tension.

Compatible Vehicles and Applications

The Dorman 300-931 pulley is compatible with the following makes and models:

• Buick Calais
• Oldsmobile Cutlass Calais
• Pontiac Grand Am
• Pontiac Skylark

This pulley is used in the engine cooling system to drive the water pump via the serpentine belt, helping maintain optimal engine temperature and preventing overheating.

Common Issues Addressed by This Pulley

• Worn or damaged pulley causing belt slippage or noise
• Corroded pulley surface leading to premature belt wear
• Misaligned pulley affecting serpentine belt routing
• Broken or cracked pulley compromising water pump operation
• Replacement of standard grade pulley for maintenance or repair

Installation Notes and Tips

The Dorman 300-931 engine water pump pulley features a bolt-on attachment with a single bolt hole measuring 0.35 inches in diameter. Installation requires removal of the old pulley and securing the new pulley with the appropriate bolt. Note that installation hardware and instructions are not included, so ensure you have the necessary tools and reference vehicle-specific repair manuals for proper torque specifications and procedures.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 300-931 engine water pump pulley is a standard replacement grade component designed for reliable performance. While installation hardware is not included, the product undergoes quality checks to ensure durability and compatibility with specified Buick, Oldsmobile, and Pontiac models.