Dorman 300-940 Engine Water Pump Pulley

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

The Dorman 300-940 engine water pump pulley is designed to provide consistent performance and durability for select Buick, Cadillac, Oldsmobile, and Pontiac vehicles. Engineered as a standard replacement part, this pulley ensures proper belt alignment and efficient water pump operation.

Key Features of the Dorman 300-940 Water Pump Pulley

• Constructed from durable composite material for long-lasting use
• Black finish housing for corrosion resistance and aesthetic consistency
• Three-groove serpentine pulley design compatible with serpentine belts
• Bolt-on attachment type for secure and straightforward installation
• Dimensions: 4.23 inches in diameter and width, with a depth of 0.85 inches
• Standard replacement grade suitable for maintaining OEM performance
• Compatible with multiple GM models including Buick Allante, Cadillac DeVille, and Pontiac Bonneville

Detailed Product Description

The Dorman 300-940 engine water pump pulley is manufactured from composite material, offering a balance of strength and weight reduction. Its black housing color provides resistance against environmental wear and matches original equipment aesthetics. Designed with three grooves, this serpentine pulley supports serpentine belt systems commonly found in Buick, Cadillac, Oldsmobile, and Pontiac vehicles such as the Cadillac DTS and Oldsmobile Aurora. The bolt-on attachment type allows for a secure fit without the need for additional hardware, although installation hardware is not included. With a diameter and width of 4.23 inches and a depth of 0.85 inches, this pulley meets the specifications required for proper belt tension and alignment.

Common Applications and Issues Addressed

• Replacement of worn or damaged water pump pulleys in Buick Allante and Pontiac Bonneville
• Resolving belt slippage or misalignment problems in Cadillac Seville and Eldorado models
• Addressing noise or vibration caused by pulley wear in Oldsmobile Aurora and Buick Lucerne
• Maintaining proper water pump function to prevent engine overheating
• Ensuring compatibility with serpentine belt systems in select GM vehicles

Installation Notes and Tips

• Installation hardware is not included; use existing bolts or source appropriate fasteners
• Ensure the serpentine belt is properly aligned on all pulleys during installation
• Verify pulley dimensions and groove count match the original part before installation
• Consult vehicle-specific service manuals for torque specifications and installation procedures

Quality Assurance and Warranty Information

Dorman parts are engineered to meet or exceed OEM standards for fit, form, and function. The 300-940 engine water pump pulley is a standard replacement part backed by Dorman's quality control processes. While installation instructions and hardware are not included, the part is designed for straightforward bolt-on installation. Warranty coverage details can be obtained directly from Dorman or authorized distributors.