Dayco 89516 Accessory Drive Belt Idler Pulley - Grooved Pulley

Dayco 89516 Accessory Drive Belt Idler Pulley

The Dayco 89516 accessory drive belt idler pulley is built for serpentine belt systems that need stable belt routing and consistent pulley operation. With a polymer construction and dual bearings, it is specified for grooved pulley applications on select Buick, Chevrolet, and Pontiac vehicles.

Key Features

• Polymer pulley material for lightweight, durable construction
• 6-groove design for 6-rib serpentine belt systems
• Dual bearings for smooth pulley rotation
• Bearing inner diameter: 10.2 mm on both bearing locations
• Bearing width: 25.5 mm
• Maximum belt width: 06 rib
• Grooved pulley position
• Cross-references ACDelco 36303 and Gates 36303 for the same application

Detailed Description

Dayco 89516 is an accessory drive belt idler pulley designed for serpentine belt routing in grooved pulley applications. Its polymer pulley body and two-bearing design support consistent belt tracking and rotation characteristics in the accessory drive belt system. This part number is listed for 2008-2009 Buick Allure, 2008-2009 Buick LaCrosse, 2006-2009 Chevrolet Impala, 2005-2008 Pontiac Grand Prix, and 2006-2007 Chevrolet Monte Carlo with a grooved pulley position. If you are replacing a worn Dayco 89516 pulley on a Buick Allure, Chevrolet Impala, or Pontiac Grand Prix, verify the belt path and pulley style against the original component before installation.

Common Problems This Part Can Address

• Squealing or chirping from a worn idler pulley
• Belt tracking issues caused by pulley wear
• Rough or noisy pulley rotation from bearing wear
• Accessory drive belt vibration in the serpentine system
• Visible pulley damage or surface wear on the grooved pulley

Installation Notes and Tips

Confirm the vehicle uses a grooved pulley in the accessory drive belt system before ordering. Match the 6-groove belt layout, bearing dimensions, and pulley width to the original part. Inspect the serpentine belt, tensioner, and adjacent pulleys during service, since wear in those components can shorten the life of the replacement pulley. For Buick Allure, Chevrolet Impala, and Pontiac Grand Prix applications, compare the original routing and mounting location to the vehicle service information before installation.

Quality Assurance

Dayco is a recognized supplier of accessory drive components, and the 89516 pulley is built to the listed dimensional and application specifications for the confirmed vehicle fitments.