Dorman 419-117 Accessory Drive Belt Tensioner Assembly - Accessory Drive

Reliable Accessory Drive Belt Tensioner for Select GM Models

The Dorman 419-117 accessory drive belt tensioner assembly is engineered to maintain optimal serpentine belt tension for smooth engine operation. Designed specifically for Buick, Cadillac, Oldsmobile, and Pontiac vehicles, this tensioner supports models such as the Allante, Aurora, Bonneville, DeVille, DTS, Eldorado, Lucerne, and Seville.

• Compatible with serpentine belt systems on select GM vehicles
• Steel AISI 1008 pulley construction for durability
• Single pulley design with one bearing for reliable rotation
• Clockwise (CW) tensioner rotation for proper belt alignment
• Precise dimensions: 76 mm outside diameter, 17 mm inside diameter, and pulley bearing diameter of 40 mm
• Width measurements of 20 mm and 31 mm ensure proper fitment

Technical Specifications and Design Details

The Dorman 419-117 tensioner assembly features a robust steel AISI 1008 pulley that provides strength and resistance to wear. Its single pulley design includes one high-quality bearing with a 40 mm diameter, supporting smooth and consistent rotation in a clockwise direction. The tensioner’s dimensions—76 mm outside diameter and 17 mm inside diameter—are engineered to match the accessory drive belt system requirements of compatible GM vehicles. With widths of 20 mm and 31 mm, this tensioner fits precisely within the serpentine belt routing, ensuring proper tension and alignment.

Compatible Vehicles and Applications

This accessory drive belt tensioner assembly is compatible with a range of Buick, Cadillac, Oldsmobile, and Pontiac models, including:

• Buick Allante and Lucerne
• Cadillac DeVille, DTS, Seville
• Oldsmobile Aurora
• Pontiac Bonneville and Eldorado

Use the Dorman 419-117 tensioner to maintain proper serpentine belt tension and prevent belt slippage or misalignment in these vehicles.

Common Issues Addressed by the Tensioner Assembly

• Eliminates belt squealing caused by improper tension
• Prevents premature serpentine belt wear and damage
• Reduces risk of accessory component failure due to belt slippage
• Maintains consistent belt alignment for efficient engine operation
• Minimizes vibration and noise from the accessory drive system

Installation Notes and Tips

When installing the Dorman 419-117 tensioner assembly, ensure the serpentine belt is properly routed according to the vehicle’s service manual. The tensioner rotates clockwise, so apply tension accordingly during installation. Verify pulley alignment and bearing condition before finalizing installation. It is recommended to inspect the serpentine belt and related components for wear and replace them if necessary to ensure optimal performance.

Quality Assurance and Warranty Information

Dorman manufactures this accessory drive belt tensioner assembly to meet or exceed OEM specifications for fit, form, and function. The steel pulley and bearing components are designed for durability and long service life. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship under normal use.