Gates 38268 Accessory Drive Belt Tensioner Assembly - Supercharger

OE Automatic Belt Tensioner for Supercharger Drive

The Gates DriveAlign Premium OE Automatic Belt Tensioner, part number 38268, is built for accessory drive systems that require consistent belt tension and OE-style fit. It is a direct replacement tensioner assembly for select supercharged Buick, Oldsmobile, and Pontiac applications, including Buick Park Avenue, Buick Riviera, Oldsmobile 88, Oldsmobile 98, and Pontiac Bonneville.

Gates applies original equipment system design standards to this DriveAlign Premium OE Automatic Belt Tensioner line, with manufacturing controlled to rigid tolerances for OE fit, form, and function. If you are replacing a worn supercharger belt tensioner on a 1991-1995 Buick Park Avenue or a 1992-1995 Pontiac Bonneville, part number 38268 is built to match the application requirements.

Key Features

• Accessory drive belt tensioner assembly for supercharger applications
• OE Exact comparison rating for direct-fit replacement use
• Thermoplastic construction
• Single pulley design with smooth/backside contact surface
• V-ribbed belt type
• 1 mounting hole configuration
• Pulley dimensions: 2.99 in. outside diameter, 1.02 in. width
• Bearing bore inside diameter: 0.67 in. (17 mm)
• Part number 38268

Product Details

This Gates DriveAlign Premium OE Automatic Belt Tensioner is engineered for the accessory drive belt system and is listed for supercharger positions on select GM vehicles. The assembly uses a thermoplastic body, one pulley, and a smooth backside contact surface to maintain proper belt routing and tension in V-ribbed belt systems. For buyers searching for a Buick Park Avenue supercharger belt tensioner, Buick Riviera belt tensioner, or Pontiac Bonneville supercharger tensioner, this part number 38268 provides the OE-style replacement format needed for service work.

This part cross-references Dayco 89375 for the same application.

Vehicle Fitment

• Fits 1991-1995 Buick Park Avenue, Supercharger
• Fits 1995 Buick Riviera, Supercharger
• Fits 1995 Oldsmobile 88, Supercharger
• Fits 1992-1995 Oldsmobile 98, Supercharger
• Fits 1992-1995 Pontiac Bonneville, Supercharger

Common Replacement Issues

• Loss of proper belt tension in the supercharger drive system
• Belt noise caused by a worn tensioner pulley or bearing
• Uneven belt tracking from a fatigued tensioner assembly
• Accessory drive belt slippage under load
• Service replacement for a damaged OE-style tensioner assembly

Installation Notes

Verify the vehicle year, make, model, and supercharger position before ordering Gates 38268. Confirm pulley dimensions, belt type, and mounting configuration against the original part to ensure correct installation. Inspect the belt, pulley surfaces, and adjacent accessory drive components during replacement so the new tensioner can operate within the intended belt path.

Quality Assurance

Gates designs its DriveAlign Premium OE Automatic Belt Tensioners using OE system engineering principles and manufactures them to rigid specifications for fit, form, and function. Part number 38268 is built as an OE-style replacement for the listed Buick, Oldsmobile, and Pontiac applications.