Dayco 89104 Accessory Drive Belt Tensioner Pulley - Main Drive

Accessory Drive Belt Tensioner Pulley for Serpentine Systems

The Dayco 89104 accessory drive belt tensioner pulley is built for serpentine belt systems that rely on smooth pulley rotation and stable belt tracking. With a polymer pulley body and dual bearings, it supports consistent accessory drive operation in applications such as Ford F-150 and Chevrolet Silverado service needs where belt noise or tensioner wear is a concern.

Key Features

• Accessory drive belt tensioner pulley for serpentine belt systems
• Polymer pulley construction for reduced mass
• Dual bearings for smooth rotation
• Bearing inner diameter: 17 mm on both bearings
• Bearing width: 24 mm
• Flat pulley profile
• Maximum belt width: 8-rib
• Dayco part number 89104

Product Details

Dayco 89104 is an accessory drive belt tensioner pulley engineered for serpentine belt routing where a flat pulley surface and 8-rib belt support are required. The pulley uses two bearings with a 17 mm inner diameter and 24 mm bearing width, helping maintain steady belt movement across the accessory drive system. This makes it a practical replacement choice for Ford F-150 and Chevrolet Silverado owners addressing belt drive service on the front accessory drive.

This part cross-references Gates 36094 for the same application.

Common Issues This Part Can Address

• Squealing or chirping from the serpentine belt area
• Rough or noisy pulley rotation
• Visible pulley wear or bearing play
• Uneven belt tracking across the accessory drive system
• Tensioner pulley replacement during belt service

Installation Notes and Tips

Verify pulley style, belt width, and bearing dimensions before installation. Confirm the serpentine belt routing and inspect the belt, tensioner arm, and adjacent pulleys for wear at the same time. For fitment-based searches, this Dayco 89104 pulley is the type of part used in Ford F-150 and Chevrolet Silverado accessory drive belt service where an 8-rib flat pulley is specified.

Quality Assurance

Dayco is a recognized name in belt drive components, and this pulley is built to match the dimensional requirements listed above for accessory drive service.