Dorman 419-319 Accessory Drive Belt Tensioner Assembly

Overview of Dorman 419-319 Accessory Drive Belt Tensioner Assembly

The Dorman 419-319 accessory drive belt tensioner assembly is engineered for reliable performance in select Nissan and INFINITI vehicles. Designed with durable aluminum and steel components, this tensioner ensures proper serpentine belt tension for smooth engine operation.

• Constructed from lightweight aluminum for durability and corrosion resistance
• Includes a single steel pulley with a 40 mm bearing diameter for consistent belt tracking
• Compatible with serpentine belt systems requiring a 155 mm length tensioner
• Features four mounting holes with diameters of 7.4 mm, 8.6 mm, and 9.2 mm for secure installation
• Maximum adjustment range of 70 degrees with counterclockwise rotation

Detailed Product Description

The Dorman 419-319 accessory drive belt tensioner assembly is designed to maintain optimal tension on the serpentine belt system in Nissan Armada, Pathfinder, Pathfinder Armada, TITAN, and INFINITI QX56 models. Its aluminum body provides a balance of strength and weight savings, while the steel pulley with a single bearing ensures smooth rotation and long service life. The tensioner’s 155 mm length and multiple mounting hole sizes allow for precise fitment and secure attachment. With a maximum adjustment range of 70 degrees and counterclockwise rotation, this tensioner accommodates belt stretch and wear, helping to prevent slippage and maintain engine accessory function.

Common Applications and Issues Addressed

• Restores proper serpentine belt tension to prevent belt slippage
• Eliminates squealing noises caused by worn or loose tensioners
• Prevents premature belt wear and extends belt life
• Resolves accessory drive system misalignment issues
• Improves overall engine accessory performance and reliability

Installation Notes and Tips

• Verify compatibility with Nissan Armada, Pathfinder, Pathfinder Armada, TITAN, and INFINITI QX56 models before installation
• Ensure the mounting holes align correctly with the vehicle’s bracket using the provided hole diameters
• Use proper torque specifications to secure the tensioner and avoid over-tightening
• Inspect the serpentine belt for wear and replace if necessary during installation
• Rotate the tensioner counterclockwise during installation to achieve proper belt tension

Quality Assurance and Warranty

Dorman manufactures the 419-319 tensioner assembly to meet or exceed OEM standards for fit, form, and function. The use of aluminum and steel materials ensures durability under normal operating conditions. This part is backed by Dorman’s limited warranty, providing coverage against defects in material and workmanship for a specified period. Always refer to the warranty documentation for detailed terms and conditions.