Gates 38406 Accessory Drive Belt Tensioner Assembly

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner

The Gates DriveAlign Premium OE Automatic Belt Tensioner (part number 38406) is engineered for precise belt tension control in select Audi vehicles. Designed to maintain optimal tension on V-ribbed accessory drive belts, this tensioner assembly supports reliable engine accessory operation in Audi A4, A4 Quattro, A6, and A6 Quattro models.

• Constructed from durable steel for long-lasting performance
• Single pulley design with a smooth backside contact surface
• Compatible with V-ribbed belt systems
• Three mounting holes for secure installation
• Exact OE comparison rating ensuring proper fit and function
• Dimensions: 2.76 inch (70 mm) outside diameter, 0.94 inch (24 mm) width, 0.67 inch (17 mm) bearing bore inside diameter

DriveAlign Premium OE Automatic Belt Tensioner Product Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates focuses on delivering original equipment quality and fitment for accessory drive belt tensioners. This product line is designed to meet or exceed OEM specifications, providing consistent belt tension and reducing wear on belt-driven components. The 38406 tensioner assembly is part of this line, ensuring compatibility and performance for Audi vehicles requiring precise tension control in their accessory drive systems.

Detailed Product Description

This accessory drive belt tensioner assembly features a robust steel construction that withstands the stresses of continuous engine operation. The single pulley, without flanges, has a smooth backside contact surface optimized for V-ribbed belts, which are common in modern Audi A4 and A6 models. The tensioner’s three mounting holes provide a secure fit, while the bearing bore inside diameter of 0.67 inches (17 mm) supports smooth pulley rotation. With an outside diameter of 2.76 inches (70 mm) and a width of 0.94 inches (24 mm), this tensioner matches the exact dimensions required for proper installation and function.

Applications and Common Issues Addressed

• Maintains proper tension on V-ribbed accessory belts to prevent slippage
• Reduces belt noise and vibration caused by improper tension
• Prevents premature wear of belts and pulleys in Audi A4 and A6 models
• Addresses belt misalignment issues due to worn or faulty tensioners
• Supports consistent accessory drive performance under varying engine loads

Installation Notes and Tips

• Ensure compatibility with Audi A4, A4 Quattro, A6, and A6 Quattro models before installation
• Verify the mounting hole alignment and pulley orientation during installation
• Inspect the V-ribbed belt for wear and replace if necessary when installing the tensioner
• Use proper torque specifications for mounting bolts to avoid damage
• Check belt tension after installation to confirm correct operation

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner 38406 is manufactured to meet original equipment standards, ensuring reliable performance and fit. Gates provides an OE comparison rating of exact fit, confirming this tensioner assembly matches factory specifications. While specific warranty details are not provided here, Gates products typically come with a limited warranty covering defects in materials and workmanship.