Dayco 89317 Accessory Drive Belt Tensioner Assembly - Water Pump

Dayco 89317 Accessory Drive Belt Tensioner Assembly

Dayco 89317 is an automatic serpentine accessory drive belt tensioner assembly for the water pump drive application. It is built for clockwise rotation and uses a single 51.9 mm pulley with 3 grooves and a 15 mm width to maintain proper belt tension in the accessory drive system.

Compatible With Buick Lucerne, Cadillac DTS, Cadillac DeVille, Cadillac Seville, Cadillac Eldorado, Cadillac Aurora, Pontiac Bonneville, and Oldsmobile Aurora applications that use this water pump tensioner setup. The Dayco 89317 part number is also a direct reference point for shoppers cross-checking OE-style replacement needs.

Key Features

• Accessory drive belt tensioner assembly for serpentine belt systems
• Automatic tensioner design for consistent belt load control
• Clockwise rotation
• Single pulley design with 51.9 mm diameter
• 3-groove pulley, 15 mm pulley width
• Water pump position application
• Dayco 89317 replacement part number

Detailed Description

This Dayco accessory drive belt tensioner assembly is specified for serpentine belt routing in water pump applications. The automatic design helps maintain belt tension as the belt system operates, while the 3-groove pulley and clockwise rotation match the listed vehicle applications. Use Dayco 89317 when replacing a worn or noisy tensioner on vehicles such as the Buick Lucerne, Cadillac DTS, and Cadillac DeVille.

This part cross-references ACDelco 38197 and Gates 38197 for the same application.

What It Helps Address

• Belt slack in the serpentine drive system
• Squealing or chirping from a worn tensioner pulley
• Uneven belt tracking at the water pump drive
• Loss of proper belt tension after component wear
• Accessory drive noise related to tensioner failure

Installation Notes and Tips

• Verify clockwise rotation and pulley groove count before installation.
• Confirm the water pump position and belt routing against the vehicle’s original setup.
• Inspect the serpentine belt and adjacent pulleys for wear before replacing the tensioner.
• Match the pulley diameter and width to the original specification for proper alignment.

Quality Assurance

Dayco is a recognized name in accessory drive components, and this tensioner assembly is built to match the listed application details for fitment-focused replacement work. Confirm the vehicle year, make, model, and water pump position before ordering Dayco 89317.