Dorman 419-016 Accessory Drive Belt Tensioner Assembly

Overview of Dorman Accessory Drive Belt Tensioner Assembly 419-016

The Dorman 419-016 accessory drive belt tensioner assembly is engineered for reliable performance in Jeep vehicles, specifically designed for the Jeep Grand Cherokee and Jeep Wrangler models. This serpentine belt tensioner ensures proper belt tension and smooth operation of the accessory drive system.

• Compatible with Jeep Grand Cherokee and Jeep Wrangler
• Serpentine belt type tensioner assembly
• Composite pulley with a 40 mm bearing diameter
• Single pulley design with clockwise rotation
• Outside diameter of 87 mm and width approximately 26 mm

Technical Specifications and Features

The Dorman 419-016 tensioner assembly features a composite pulley constructed for durability and reduced weight. It includes one pulley with a 40 mm bearing diameter, designed to support smooth rotation and reduce wear. The tensioner has an outside diameter of 87 mm and a width close to 26 mm, fitting precisely within the accessory drive belt system. The inside diameter measures 17 mm, and the tensioner rotates clockwise (CW), matching the original equipment specifications for Jeep Grand Cherokee and Wrangler models. This assembly is designed for serpentine belt systems, which are common in modern Jeep vehicles.

Purpose and Common Applications

This accessory drive belt tensioner assembly is used to maintain proper tension on the serpentine belt, which drives multiple engine accessories such as the alternator, power steering pump, and air conditioning compressor. It helps prevent belt slippage and premature wear.

• Eliminates belt squealing caused by improper tension
• Prevents belt misalignment and uneven wear
• Reduces risk of accessory drive system failure
• Addresses pulley bearing noise or failure
• Restores proper belt tension after component replacement

Installation Notes and Tips

When installing the Dorman 419-016 tensioner assembly on Jeep Grand Cherokee or Wrangler models, ensure the serpentine belt is properly routed according to the vehicle’s belt diagram. Use appropriate tools to relieve tension from the old belt tensioner before removal. Verify the tensioner rotates clockwise as specified and that the pulley spins freely without resistance. Double-check belt alignment after installation to avoid premature wear.

Quality Assurance and Warranty

Dorman manufactures this accessory drive belt tensioner assembly to meet or exceed OEM standards for fit, form, and function. The composite pulley and bearing are engineered for durability under typical operating conditions. This part is backed by Dorman’s limited warranty, providing coverage against defects in materials and workmanship for a specified period, ensuring confidence in your replacement part.