Dorman 420-116 Engine Timing Belt Tensioner

Reliable Engine Timing Belt Tensioner for Audi and Volkswagen

The Dorman 420-116 engine timing belt tensioner is designed to maintain proper tension on the timing belt for Audi A4, A4 Quattro, and Volkswagen Passat models. Crafted from durable aluminum alloy, this automatic hydraulic tensioner ensures consistent performance and helps protect your engine's valve train components.

Key Features of the Dorman 420-116 Timing Belt Tensioner

• Constructed from lightweight and corrosion-resistant aluminum alloy
• Automatic hydraulic tensioner style for precise belt tensioning
• Die cast aluminum contact surface for smooth operation
• Standard replacement grade for reliable durability
• Includes one tensioner unit; bracket and pulley not included

Detailed Product Description

The Dorman 420-116 timing belt tensioner is engineered to provide consistent tension to the timing belt, which is critical for maintaining engine timing and preventing belt slippage. Its aluminum alloy construction offers a balance of strength and weight savings, while the die cast aluminum contact surface reduces wear on the belt. This tensioner is an automatic hydraulic type, meaning it adjusts tension dynamically as the engine operates, eliminating the need for manual adjustments. Designed as a standard replacement part, it meets OEM specifications for fit and function on select Audi and Volkswagen vehicles.

Compatible Vehicles and Common Applications

• Maintains proper timing belt tension on Audi A4 and A4 Quattro models
• Compatible with Volkswagen Passat engines requiring automatic hydraulic tensioners
• Helps prevent timing belt slack and potential engine misfires
• Addresses issues related to belt noise and premature wear
• Supports engine performance by ensuring accurate valve timing

Installation Notes and Tips

Installation of the Dorman 420-116 tensioner should be performed by a qualified technician familiar with timing belt systems. Since this tensioner does not include a bracket or pulley, ensure existing components are inspected and replaced if necessary. Proper alignment and torque specifications must be followed to avoid engine damage. It is recommended to replace the timing belt simultaneously to maintain optimal system reliability.

Quality Assurance and Warranty Information

Dorman provides this timing belt tensioner as a standard replacement part, manufactured to meet industry standards for durability and performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Refer to the product packaging or Dorman’s official documentation for exact warranty terms.