Dayco 89290 Accessory Drive Belt Tensioner Assembly

Dayco 89290 Accessory Drive Belt Tensioner Assembly

The Dayco 89290 accessory drive belt tensioner assembly is built for serpentine belt systems that require automatic tension control and consistent pulley tracking. It is a direct-fit service part for select Chevrolet, Pontiac, and Oldsmobile applications, including Cavalier, Sunfire, Alero, Grand Am, and Malibu models.

• Automatic, integral tensioner design for serpentine belt systems
• Clockwise rotation
• Single pulley construction
• 76 mm pulley diameter
• 22 mm pulley width with flat pulley surface
• Direct replacement for select GM applications

Fitment Details

• Fits 1999-2002 Chevrolet Cavalier, N/A
• Fits 1999-2002 Pontiac Sunfire, N/A
• Fits 2000-2001 Oldsmobile Alero, N/A
• Fits 2000-2001 Pontiac Grand Am, N/A
• Fits 1998-1999 Chevrolet Malibu, N/A
• Fits 1999 Oldsmobile Alero, N/A, 2nd Design
• Fits 1999 Pontiac Grand Am, N/A, 2nd Design

This part cross-references ACDelco 38247 and Gates 38247 for the same application.

What It Helps Address

• Serpentine belt slack caused by a worn tensioner
• Belt noise from inconsistent pulley pressure
• Accessory drive belt tracking issues
• Reduced belt tension on GM 4-cylinder and V6 accessory drive systems
• Premature belt wear related to tensioner pulley wear

Installation Notes

Verify pulley direction, diameter, and width before installation. Confirm the vehicle’s design revision on 1999 Oldsmobile Alero and 1999 Pontiac Grand Am, since both list a 2nd Design application. Inspect the serpentine belt, idler pulleys, and accessory drive components during service to help ensure proper belt alignment after replacement.

Quality Assurance

Dayco manufactures accessory drive components for service replacement applications and this tensioner assembly is specified with OE-style dimensions and rotation details for accurate fitment on listed vehicles.