Dorman 420-127 Engine Timing Belt Tensioner

Dorman 420-127 Engine Timing Belt Tensioner

Dorman 420-127 is an engine timing belt tensioner built to match the fit and function of the original unit on specified applications. It is a standard replacement for Acura and Honda models that use an automatic hydraulic tensioner in the timing belt system.

Key Features

• Automatic hydraulic tensioner style for timing belt applications
• Ductile iron construction for strength and durability
• Cast steel contact surface material
• Standard replacement design for OE-style fit and function
• No adjustable mechanism, pulley, or bracket included
• Compatible with Acura MDX, TL, TSX, RLX, RDX, ZDX, RL, and Honda Accord, Odyssey, Pilot, Ridgeline, Crosstour, and Accord Crosstour applications

Detailed Description

This Dorman timing belt tensioner is engineered for vehicles that require a hydraulic automatic tensioner to maintain proper timing belt tension. The ductile iron body and cast steel contact surface are selected for dependable operation in the engine valve train. Part number 420-127 is a direct-fit replacement for many Acura and Honda timing belt service applications, including 2003-2018 Acura MDX, 2003-2017 Honda Accord, and 2005-2019 Honda Odyssey.

This part cross-references Dayco 85019 and Gates T43129 for the same application. It also serves as a replacement option for Acura and Honda timing belt service where OE-style fitment is required.

Common Problems This Part Can Address

• Timing belt tension loss from a worn hydraulic tensioner
• Noise from a weakened or failing tensioner assembly
• Improper belt control in high-mileage timing belt service
• Replacement needs during timing belt maintenance on Acura and Honda engines
• Fitment issues caused by using the wrong tensioner style

Installation Notes and Tips

Verify engine application before installation, since fitment varies by year and model. This tensioner uses an automatic hydraulic design, so follow the vehicle service procedure for timing belt alignment, tensioner setting, and engine timing verification. Because no pulley or bracket is included, reuse or replace related timing components as required by the service job. Confirm the correct part number 420-127 before assembly on Acura MDX, Honda Pilot, or Honda Odyssey timing belt repairs.

Quality Assurance

Dorman manufactures this replacement tensioner as a standard replacement component designed to match original fit and function on listed applications. It is built from quality materials for reliable performance and durability in timing belt service.