Gates 38198 Accessory Drive Belt Tensioner Assembly

OE Belt Tensioner for GM Accessory Drive Systems

The Gates DriveAlign Premium OE Automatic Belt Tensioner, part number 38198, is built for accessory drive belt systems that require consistent belt control and OE-style fit. It is a direct replacement for select Chevrolet, Oldsmobile, and Pontiac applications, including Lumina, Monte Carlo, Cutlass Supreme, and Grand Prix models.

Gates applies OE system design experience to this DriveAlign tensioner line, with manufacturing held to tight tolerances for fit, form, and function. The 38198 tensioner uses a thermoplastic body, a smooth/backside pulley surface, and a V-ribbed belt design to support proper belt tracking in the accessory drive system.

Key Features

• DriveAlign Premium OE Automatic Belt Tensioner assembly
• OE Exact comparison rating for direct-fit replacement use
• Thermoplastic construction
• Single smooth/backside pulley for V-ribbed belts
• 2 mounting holes for OE-style installation points
• Pulley dimensions: 3.23 in. outside diameter, 0.98 in. width
• Bearing bore inside diameter: 0.67 in. / 17 mm

Detailed Description

Gates 38198 is an automatic belt tensioner assembly designed for the accessory drive belt system on select GM vehicles. It is engineered to match OE specifications closely, helping maintain correct belt tension and pulley alignment in applications such as the Chevrolet Lumina, Chevrolet Monte Carlo, Oldsmobile Cutlass Supreme, and Pontiac Grand Prix. This part cross-references Dayco 89340 for the same application.

As part of the Gates DriveAlign Premium OE Automatic Belt Tensioner line, this component is manufactured to rigid tolerances so it matches the original fit and operating geometry. That makes it a practical choice when replacing a worn tensioner on a 1991-1997 Chevrolet Lumina, 1995-1997 Chevrolet Monte Carlo, 1991-1996 Oldsmobile Cutlass Supreme, or 1991-1996 Pontiac Grand Prix.

What This Part Helps Address

• Belt squeal caused by weak or inconsistent tension
• Accessory drive belt flutter or vibration
• Uneven belt tracking across the pulley path
• Noise from a worn tensioner pulley or bearing
• Loss of proper belt tension in the serpentine drive system

Installation Notes and Tips

• Verify the vehicle application by year, make, and model before ordering.
• Inspect the belt, idler pulleys, and related accessory drive components during replacement.
• Confirm pulley alignment and mounting point condition before final tightening.
• Use the OE-style belt routing for the specific engine configuration.

Quality Assurance

Gates designs this DriveAlign tensioner using OE system knowledge and builds it to specifications intended to deliver OE fit, form, and function. The 38198 is an OE Exact replacement option for drivers servicing compatible Chevrolet, Oldsmobile, and Pontiac accessory drive systems.