Dorman 419-642 Accessory Drive Belt Idler Pulley - Lower

Reliable Accessory Drive Belt Idler Pulley for Chevrolet and Ford Vehicles

The Dorman 419-642 accessory drive belt idler pulley is designed to maintain proper tension and alignment of the serpentine belt system in select Chevrolet, Ford, GMC, and Oldsmobile models. Engineered with durable plastic and precise dimensions, this idler pulley supports smooth belt operation and helps prevent premature wear.

• Constructed from durable black plastic for corrosion resistance
• Measures 112.5 mm outside diameter with a 17 mm inside diameter
• Features 6 grooves compatible with serpentine belts
• Includes a single mounting hole for secure installation
• Equipped with one pulley bearing, 12 mm in width, for smooth rotation
• Specifically designed for select Chevrolet Blazer, Ford Mustang, GMC Yukon, and other models

Detailed Product Description and Specifications

The Dorman 419-642 idler pulley is a critical component in the accessory drive belt system, ensuring the serpentine belt maintains proper tension and alignment. Made from high-quality plastic, this black pulley offers resistance to corrosion and wear. Its 112.5 mm outside diameter and 17 mm inside diameter are engineered to fit specific vehicle applications, including Chevrolet C1500 Suburban, Ford Mustang, GMC Jimmy, and Oldsmobile Bravada. The pulley features six grooves to accommodate serpentine belts, and a single mounting hole for precise attachment. The integrated bearing, 12 mm wide, supports smooth and reliable pulley rotation, reducing belt slippage and noise.

Compatible Vehicles and Common Applications

• Chevrolet Blazer, C1500, C2500, C3500, Tahoe, Yukon, and Suburban models
• Ford Mustang and various F-series trucks
• GMC Jimmy, Sierra, and Suburban models
• Oldsmobile Bravada and related vehicles
• Maintains serpentine belt tension and alignment in accessory drive systems

Installation Notes and Tips

• Verify vehicle compatibility using the part number 419-642 before installation
• Inspect the serpentine belt and related components for wear during replacement
• Ensure the mounting hole aligns correctly with the vehicle’s bracket for secure fitment
• Use proper torque specifications to avoid pulley or bearing damage

Quality Assurance and Warranty Information

Dorman manufactures the 419-642 idler pulley to meet or exceed OEM standards for fit, form, and function. The plastic construction and sealed bearing design contribute to long service life under normal operating conditions. While specific warranty details vary, Dorman typically offers coverage against defects in materials and workmanship to provide confidence in product reliability.