Gates 39084 Accessory Drive Belt Tensioner Assembly

Overview of Gates DriveAlign Premium OE Automatic Belt Tensioner 39084

The Gates DriveAlign Premium OE Automatic Belt Tensioner 39084 is engineered for precise belt tension control in select Audi and Volkswagen models. Designed to maintain optimal tension on V-ribbed accessory drive belts, this tensioner assembly supports reliable engine accessory operation.

• Thermoplastic construction for durability and heat resistance
• Single smooth backside pulley without flange
• Outside diameter: 2.76 inches (70 mm)
• Width: 0.98 inches (25 mm)
• Three mounting holes for secure installation
• Bearing bore inside diameter: 0.67 inches (17 mm)
• Compatible with V-ribbed belt systems

Detailed Product Description and Specifications

This accessory drive belt tensioner assembly from Gates features a thermoplastic body designed to withstand the thermal and mechanical stresses typical in automotive engine compartments. The pulley is smooth on the contact surface and lacks flanges, which suits specific V-ribbed belt configurations. With an outside diameter of 2.76 inches and a width of 0.98 inches, the tensioner fits precisely within the accessory drive belt system. The bearing bore inside diameter measures 0.67 inches, ensuring proper fitment and rotation. The assembly includes three mounting holes, providing stable and secure attachment to the engine.

DriveAlign Premium OE Automatic Belt Tensioner Product Line

The DriveAlign Premium OE Automatic Belt Tensioner line by Gates is designed to meet original equipment specifications for automatic belt tensioning systems. This product line focuses on delivering exact OE fit and function, ensuring consistent belt tension and reducing wear on belt-driven accessories. The 39084 tensioner assembly is an OE exact replacement, engineered to maintain proper belt alignment and tension in Audi and Volkswagen vehicles equipped with V-ribbed belts.

Compatible Vehicles and Common Applications

This Gates tensioner assembly is compatible with various Audi and Volkswagen models, including:

• Audi A3 and A3 Quattro
• Volkswagen Bora, Eos, Golf, Golf R, GTI
• Volkswagen Jetta, Jetta City, Passat
• Volkswagen TT, TT Quattro, TTS Quattro

Common Issues Addressed by This Belt Tensioner

• Excessive belt slack causing accessory noise or slippage
• Premature belt wear due to improper tension
• Vibration or misalignment in the accessory drive system
• Failure of original tensioner leading to belt system malfunction
• Reduced efficiency of alternator, power steering, or A/C compressor

Installation Notes and Tips

• Ensure the correct belt type (V-ribbed) is used with this tensioner
• Verify mounting hole alignment and torque specifications per vehicle service manual
• Inspect belt condition and replace if worn or damaged during installation
• Use proper tools to avoid damage to the thermoplastic housing or pulley
• Check belt tension after installation to confirm proper operation

Quality Assurance and Warranty

The Gates DriveAlign Premium OE Automatic Belt Tensioner 39084 is manufactured to meet stringent OE standards for fit, form, and function. This tensioner assembly is rated as an OE exact replacement, ensuring reliable performance in compatible Audi and Volkswagen models. Gates provides a limited warranty covering defects in materials and workmanship, supporting long-term durability and customer confidence.