Dorman 419-300 Accessory Drive Belt Tensioner Assembly

Reliable Accessory Drive Belt Tensioner for Chrysler and Dodge Vehicles

The Dorman 419-300 accessory drive belt tensioner assembly is designed to maintain proper tension on serpentine belts in select Chrysler, Dodge, and Plymouth models. Engineered for durability and precise fitment, this tensioner helps ensure smooth operation of your vehicle's accessory drive system.

• Compatible with Chrysler Caravan, Grand Caravan, Grand Voyager, Imperial, New Yorker, Town & Country, and Voyager models
• Features a single steel AISI 1008 pulley with a 40 mm bearing diameter
• Clockwise (CW) tensioner rotation for accurate belt alignment
• Outside diameter of 90 mm and inside diameter of 17 mm for proper fit
• Designed for serpentine belt systems with one pulley and no grooves

Technical Specifications and Design Details

The Dorman 419-300 tensioner assembly includes a steel pulley constructed from AISI 1008 material, providing strength and resistance to wear. The pulley has a 40 mm bearing diameter and is designed with a smooth surface, as it features zero grooves, suitable for serpentine belt applications. The tensioner rotates clockwise to maintain optimal belt tension and alignment, reducing the risk of belt slippage or premature wear. With an outside diameter of 90 mm and widths of 20 mm and 30 mm, this tensioner fits precisely within the accessory drive belt system of compatible vehicles.

Compatible Vehicles and Applications

This accessory drive belt tensioner assembly is compatible with a range of Chrysler, Dodge, and Plymouth vehicles, including the Caravan, Grand Caravan, Grand Voyager, Imperial, New Yorker, Town & Country, and Voyager models. The part number 419-300 ensures you receive the correct tensioner designed specifically for these applications, helping maintain the performance and reliability of your vehicle's serpentine belt system.

Common Issues Addressed by the Dorman 419-300 Tensioner

• Eliminates belt slippage caused by improper tension
• Prevents premature belt wear and cracking
• Reduces noise from loose or misaligned belts
• Maintains consistent accessory drive performance
• Helps avoid engine overheating due to accessory failure

Installation Notes and Tips

When installing the Dorman 419-300 tensioner, ensure the serpentine belt is properly routed according to the vehicle’s service manual. Use appropriate tools to relieve tension from the old belt tensioner before removal. Verify the tensioner rotates clockwise as specified and that the pulley aligns correctly with the belt path. After installation, double-check belt tension and alignment to prevent premature wear or noise.

Quality Assurance and Warranty Information

Dorman manufactures the 419-300 tensioner assembly to meet or exceed OEM specifications, using durable materials such as steel AISI 1008 for the pulley. This part undergoes rigorous quality control to ensure reliable performance in demanding automotive environments. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship for this accessory drive belt tensioner assembly.