Dorman 419-107 Accessory Drive Belt Tensioner Assembly

Reliable Accessory Drive Belt Tensioner for GM Vehicles

The Dorman 419-107 accessory drive belt tensioner assembly is engineered to maintain optimal tension on serpentine belts in select Buick, Cadillac, Chevrolet, and Pontiac models. Designed for durability and precise fitment, this tensioner supports smooth engine operation in vehicles like the Camaro, Caprice, Firebird, Fleetwood, Impala, and Roadmaster.

• Compatible with Buick, Cadillac, Chevrolet, and Pontiac models including Camaro, Caprice, Firebird, Fleetwood, Impala, and Roadmaster
• Part number 419-107 ensures exact replacement fit
• Serpentine belt type with a single pulley design
• Pulley made from polyamide 6.6 reinforced with 30% glass fiber for strength and wear resistance
• Pulley diameter: 90.3 mm outside, 17 mm inside diameter
• Width options: 20 mm and 27 mm for versatile belt compatibility
• Single pulley bearing with a 40 mm diameter for smooth rotation
• Clockwise (CW) tensioner rotation for proper belt alignment

Detailed Product Description and Specifications

The Dorman 419-107 accessory drive belt tensioner assembly is designed to provide consistent tension to serpentine belts, preventing slippage and ensuring efficient power transmission to engine accessories. The tensioner features a single pulley constructed from polyamide 6.6 with 30% glass fiber fill, offering enhanced durability and resistance to heat and wear. The pulley measures 90.3 mm in outside diameter and 17 mm inside diameter, with widths of 20 mm and 27 mm to accommodate various belt sizes. Equipped with one pulley bearing measuring 40 mm in diameter, this tensioner supports smooth and reliable rotation in a clockwise direction, matching the original equipment specifications for the listed GM vehicles.

Applications and Common Issues Addressed

• Maintains proper serpentine belt tension to prevent belt slippage and noise
• Reduces premature belt wear and extends belt life
• Prevents accessory drive system failures such as alternator or power steering pump malfunction
• Eliminates vibration and misalignment issues in the belt drive system
• Restores correct tensioner rotation and pulley function for smooth engine operation

Installation Notes and Tips

• Ensure compatibility with your vehicle’s make and model before installation
• Inspect the serpentine belt for wear and replace if necessary during tensioner installation
• Use proper tools to relieve tension safely and avoid damage to the tensioner or belt
• Verify clockwise rotation alignment to match original equipment specifications
• Check pulley and bearing condition to ensure smooth operation after installation

Quality Assurance and Warranty Information

Dorman manufactures the 419-107 accessory drive belt tensioner assembly to meet or exceed OEM standards for fit, form, and function. The use of reinforced polyamide materials and precision bearings ensures long-lasting performance under typical operating conditions. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship for a specified period, supporting confidence in your replacement component.