Hayden 5991 Accessory Drive Belt Idler Pulley

Overview of Hayden Pulley Accessory Drive Belt Idler Pulley

The Hayden Pulley 5991 is a durable accessory drive belt idler pulley designed for select Chevrolet and GMC models. Engineered to meet or exceed OEM specifications, this black plastic pulley supports serpentine belt systems on vehicles like the Chevrolet S10, S10 Blazer, S15, and GMC Sonoma.

• Material: High-quality black plastic construction
• Compatible with serpentine belt systems
• Inside diameter: 0.46875 inches (12.0 mm)
• Outside diameter: 5.1875 inches (131.763 mm)
• Width: 1 inch (25.4 mm)
• Groove quantity: 6 grooves for belt alignment
• Meets or exceeds OEM standards
• Single mount hole design (mounting hardware not included)

Hayden Pulley Product Line Details

The Hayden Pulley product line focuses on accessory drive belt system components, providing reliable idler and tensioner pulleys engineered for precise fit and function. The Pulley line ensures compatibility with specific vehicle applications, such as the Chevrolet S10 and GMC Sonoma, offering components that maintain proper belt tension and alignment within the accessory drive system.

Product Description and Specifications

This idler pulley (part number 5991) is constructed from durable plastic and features a black finish. It is designed with six grooves to accommodate serpentine belts up to 1 inch (25.4 mm) wide. The pulley’s inside diameter measures approximately 0.46875 inches (12 mm), while the outside diameter is 5.1875 inches (131.763 mm). Its single mounting hole allows for straightforward installation, although mounting hardware is not included. This pulley is compatible with accessory drive belt systems on Chevrolet S10, S10 Blazer, S15, and GMC Sonoma models, ensuring proper belt routing and tension.

Common Applications and Issues Addressed

• Replacement of worn or damaged idler pulleys in serpentine belt systems
• Resolving belt misalignment or slipping issues
• Reducing noise caused by pulley wear or bearing failure
• Maintaining proper belt tension to prevent accessory drive malfunctions
• Supporting accessory components such as alternators, power steering pumps, and air conditioning compressors

Installation Notes and Tips

• Verify compatibility with your Chevrolet or GMC model before installation
• Ensure the serpentine belt width matches the pulley groove width (1 inch / 25.4 mm)
• Inspect mounting hardware and replace if necessary, as it is not included with this pulley
• Follow vehicle manufacturer torque specifications when securing the pulley
• Check belt alignment and tension after installation to ensure proper operation

Quality Assurance and Warranty

The Hayden Pulley 5991 meets or exceeds OEM quality standards, providing reliable performance for accessory drive belt systems. While specific warranty details are not provided, Hayden products typically adhere to industry quality controls to ensure durability and fitment accuracy for Chevrolet and GMC vehicles including the S10, S10 Blazer, S15, and Sonoma.