Dorman 420-116 Engine Timing Belt Tensioner

Dorman 420-116 Timing Belt Tensioner

Dorman 420-116 is an engine timing belt tensioner built for direct fit and dependable operation on select Audi A4, Audi A4 Quattro, and Volkswagen Passat applications. It uses an automatic hydraulic design and aluminum alloy construction to match the original part’s fit and function in the timing system.

Key Features

• Automatic hydraulic tensioner style for consistent timing belt tension control
• Aluminum alloy body with die cast aluminum contact surface
• Standard replacement part for OE-style service
• Direct-fit design for select 2001-2006 Audi A4, Audi A4 Quattro, and 2001-2005 Volkswagen Passat models
• Engineered to match original tensioner fit and function on specified applications

Detailed Description

This Dorman timing belt tensioner, part number 420-116, is designed for engine valve train service where accurate belt tension is required. The hydraulic automatic design helps maintain proper timing belt load, while the aluminum alloy construction supports durability in demanding engine environments. It is a standard replacement for vehicles that use the specified OE-style tensioner layout, including Audi A4, Audi A4 Quattro, and Volkswagen Passat models within the listed years. This part cross-references Gates T43028 for the same application.

What It Helps Fix

• Timing belt slack caused by a worn tensioner
• Noise from a failing hydraulic tensioner assembly
• Improper belt tension that can affect engine timing
• Service issues during timing belt replacement on Audi A4 and Passat engines
• Wear-related loss of tension control in the valve train system

Installation Notes and Tips

• Verify engine code and VIN breakpoints before ordering, especially for 2001 Audi A4 and A4 Quattro models from VIN 8D-1-042 385.
• Inspect the timing belt, pulleys, and related components during service; this tensioner is supplied without a pulley or bracket.
• Follow factory timing procedures and torque specifications during installation.
• Confirm the hydraulic tensioner is properly seated and aligned before final engine assembly.

Quality Assurance

Dorman manufactures this replacement tensioner to match original fit and function on the listed applications, using quality materials for reliable performance and durability.