Gates 38421 Accessory Drive Belt Tensioner Assembly - Serpentine

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38421 is engineered to maintain optimal tension on the accessory drive belt system. Designed specifically for Acura and Honda vehicles including Accord, Civic, CR-V, RSX, and TSX models, this tensioner assembly ensures consistent belt performance and longevity.

• Constructed from durable steel for strength and reliability
• Compatible with V-ribbed belt types commonly used in Acura and Honda vehicles
• Single pulley design with a smooth backside contact surface
• Mounting hole quantity: 1 for straightforward installation
• Precision dimensions: 2.99 inch (76 mm) outside diameter and 1.46 inch (37 mm) width
• Bearing bore inside diameter of 0.67 inch (17 mm) for proper fitment

Detailed Product Description

This accessory drive belt tensioner assembly from Gates is built with steel components to provide durability under engine operating conditions. The single pulley, which is not flanged, features a smooth backside contact surface designed to work with V-ribbed belts, ensuring consistent belt alignment and tension. The tensioner’s dimensions, including a 2.99 inch (76 mm) outside diameter and 1.46 inch (37 mm) width, are engineered to meet original equipment specifications. The bearing bore inside diameter of 0.67 inch (17 mm) allows for precise mounting and smooth rotation. This part is identified by part number 38421 and is rated for OE performance, making it a reliable replacement for the accessory drive belt tensioner in compatible Acura and Honda models.

DriveAlign Premium OE Automatic Belt Tensioner Product Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates focuses on delivering tensioner assemblies that meet or exceed original equipment standards. This product line emphasizes precise fitment and consistent belt tension to support accessory drive systems in modern vehicles. The 38421 tensioner is part of this line, offering a balance of durability and performance tailored for Acura and Honda applications.

Common Applications and Issues Addressed

• Maintains proper tension on V-ribbed accessory drive belts
• Prevents belt slippage and associated noise
• Reduces premature belt wear and extends belt life
• Eliminates belt misalignment issues caused by worn tensioners
• Supports smooth operation of engine accessories such as alternators and power steering pumps

Installation Notes and Tips

• Ensure compatibility with Acura and Honda models including Accord, Civic, CR-V, RSX, and TSX before installation
• Verify the mounting hole alignment and bearing bore dimensions for proper fit
• Inspect the V-ribbed belt for wear and replace if necessary during tensioner installation
• Follow manufacturer torque specifications when securing the tensioner assembly
• Check belt tension after installation to confirm proper operation

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38421 is manufactured to meet original equipment performance standards. Constructed from steel with precision dimensions, it offers reliable service life in demanding engine environments. This part carries an OE comparison rating, ensuring it matches the quality and fit of the original tensioner. Warranty details are provided by Gates and typically cover defects in material and workmanship under normal use.