Dorman 300-123 Power Steering Pump Pulley

Overview of the Dorman Power Steering Pump Pulley 300-123

The Dorman 300-123 power steering pump pulley is designed for reliable performance in select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. Engineered with a composite material and a 6-groove serpentine belt design, this pulley supports efficient power steering operation in models like the Cavalier, Corsica, and Grand Prix.

• Constructed from durable composite material for corrosion resistance
• Black finish with 6 grooves compatible with serpentine belts
• Outside diameter measures 5.188 inches for precise fitment
• Single mounting hole with a bore diameter of 0.7472 inches
• Standard replacement grade for dependable service
• Includes the pulley only; mounting hardware and installation instructions are not included

Detailed Product Description

The Dorman 300-123 power steering pump pulley is a direct replacement part designed to restore proper belt alignment and power steering pump function. Its composite construction offers resistance to wear and environmental factors, helping maintain consistent performance. The 6-groove design matches serpentine belt systems found on various Buick, Chevrolet, Oldsmobile, and Pontiac models, including the Lumina, Monte Carlo, Regal, and Sunbird. With an outside diameter of 5.188 inches and a bore size of 0.7472 inches, this pulley ensures a secure fit on the power steering pump shaft, supporting smooth steering operation.

Common Applications and Problem Resolution

• Replaces worn or damaged power steering pump pulleys causing belt slippage
• Addresses noise issues related to pulley misalignment or wear
• Restores proper serpentine belt routing and tension
• Helps eliminate steering assist loss due to pulley failure
• Prevents premature belt wear caused by damaged pulley grooves

Installation Notes and Tips

Installation of the Dorman 300-123 power steering pump pulley requires removal of the old pulley and proper alignment on the power steering pump shaft. Note that mounting hardware and installation instructions are not included, so having the appropriate tools and reference materials is recommended. Ensure the serpentine belt is correctly routed over the 6 grooves to maintain proper tension and function. It is advisable to inspect the belt and related components during installation for optimal system performance.

Quality Assurance and Warranty

This Dorman power steering pump pulley is manufactured to meet standard replacement quality requirements. While mounting hardware and instructions are not provided, the part is engineered to OEM specifications for fit and function. Dorman typically offers a limited warranty on their replacement parts; please refer to official Dorman documentation for specific warranty details related to part number 300-123.