Dorman 419-119 Accessory Drive Belt Tensioner Assembly

Reliable Accessory Drive Belt Tensioner for Chevrolet, Oldsmobile, Pontiac

The Dorman 419-119 accessory drive belt tensioner assembly is engineered to maintain optimal serpentine belt tension for select Chevrolet, Oldsmobile, and Pontiac vehicles. Designed for durability and precise fitment, this tensioner supports smooth engine operation and accessory performance.

• Compatible with Chevrolet Alero, Cavalier, Malibu; Oldsmobile Alero; Pontiac Grand Am, Sunfire
• Serpentine belt type tensioner with a single pulley
• Pulley diameter: 76.5 mm outside, 17 mm inside diameter
• Polyamide 6.6 pulley reinforced with 30% glass fiber for strength
• Counterclockwise rotation for proper belt alignment
• Includes one pulley bearing with a 40 mm diameter
• Part number 419-119 ensures exact replacement fit

Detailed Product Description and Specifications

The Dorman 419-119 accessory drive belt tensioner assembly is designed to provide consistent tension on the serpentine belt system, preventing slippage and ensuring efficient power transfer to engine accessories. The tensioner features a single pulley constructed from polyamide 6.6 reinforced with 30% glass fiber, offering enhanced durability and resistance to wear. The pulley measures 76.5 mm in outside diameter and 17 mm inside diameter, with a 40 mm bearing diameter to support smooth rotation. This assembly rotates counterclockwise, matching the original equipment specifications for proper belt routing and tension.

Common Applications and Problem Resolution

• Eliminates belt squealing caused by improper tension
• Prevents premature serpentine belt wear and damage
• Resolves accessory drive noise related to pulley bearing failure
• Maintains consistent belt tension to avoid engine accessory malfunction
• Addresses tensioner arm misalignment or failure issues

Installation Notes and Tips

When installing the Dorman 419-119 tensioner, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. Use appropriate tools to relieve tension safely before removal. Verify the tensioner rotates counterclockwise and that the pulley spins freely without noise or resistance. Inspect the serpentine belt for wear and replace if necessary to ensure optimal system performance.

Quality Assurance and Warranty Information

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 419-119 accessory drive belt tensioner assembly undergoes rigorous quality control to ensure durability and reliable operation. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship under normal use.