Dayco 89001 Accessory Drive Belt Tensioner Pulley - Smooth Pulley

Dayco 89001 Idler Pulley for Serpentine Belt Systems

Dayco 89001 is an accessory drive belt tensioner pulley built for serpentine belt systems that need a smooth-running idler pulley. It uses a polymer pulley body with a single bearing to support accessory drive operation on a wide range of Ford trucks, vans, and select GM and other applications.

Fits 1985-1997 Ford F-150, F-250, F-350, Bronco, Ranger, E-Series vans, and related applications with the listed pulley configuration. Dayco 89001 also cross-references Gates 38012 for the same application.

Key Features

• Brand: Dayco Idler Assy. Pulley
• Part number: 89001
• Accessory drive belt tensioner pulley for serpentine belt systems
• Polymer pulley construction
• Flat pulley design
• Single bearing design with 17 mm inner diameter and 12 mm bearing width
• Maximum belt width: 6-rib serpentine belt
• Direct replacement style for smooth pulley applications

Product Details

The Dayco 89001 idler pulley is specified for accessory drive belt systems that use a serpentine belt and a smooth pulley layout. The polymer construction helps keep the pulley lightweight while the bearing design supports consistent belt tracking in engine accessory drives. This part number is listed across many Ford truck and van applications, including F-150, F-250, F-350, Bronco, Ranger, and E-Series models, along with select Chevrolet, GMC, Buick, Oldsmobile, Pontiac, Lincoln, Mercury, Cadillac, and Isuzu vehicles.

Dayco 89001 is a practical replacement choice when servicing a worn or noisy idler pulley in a serpentine belt system. The BrandLine, Idler Assy. Pulley, identifies this as a pulley-focused component within Dayco’s accessory drive belt system lineup.

What It Helps Address

• Squealing or chirping from a worn idler pulley bearing
• Belt misalignment in a serpentine accessory drive system
• Rough pulley rotation that can affect belt operation
• Visible pulley wear on smooth pulley applications
• Accessory drive noise on Ford F-150, F-250, F-350, Bronco, and Ranger models

Installation Notes and Tips

Verify pulley style, belt type, and vehicle-specific notes before installation. This part is listed for smooth pulley and N/A positions depending on application, so confirm the original pulley configuration on the vehicle. Check belt condition, belt routing, and adjacent accessory components during service to avoid repeat noise or premature wear.

Fits 1997 Ford F-250 HD, Smooth Pulley; Fits 1997 Ford F-250 HD, N/A; Fits 1987-1997 Ford F-350, N/A; Fits 1995-1997 Ford F-350, Smooth Pulley; Fits 1992-1997 Ford Ranger, Smooth Pulley; Fits 1990-1996 Ford Bronco, N/A; Fits 1987-1996 Ford E-150 Econoline, N/A; Fits 1987-1996 Ford E-150 Econoline Club Wagon, N/A; Fits 1987-1996 Ford E-250 Econoline, N/A; Fits 1987-1996 Ford E-350 Econoline, N/A; Fits 1987-1996 Ford E-350 Econoline Club Wagon, N/A; Fits 1987-1996 Ford F-150, N/A; Fits 1987-1996 Ford F-250, N/A; Fits 1990-1996 Ford F-350, N/A; Fits 1995 Chevrolet Tahoe, N/A; Fits 1994 Chevrolet Blazer, N/A; Fits 1994-1995 GMC Yukon, N/A; Fits 1987-1993 Chevrolet S10, N/A; Fits 1991-1993 Ford Thunderbird, N/A; Fits 1991-1993 GMC Sonoma, N/A; Fits 1991-1993 Mercury Cougar, N/A; Fits 1987-1992 Ford Bronco, N/A; Fits 1989-1991 Isuzu Trooper, N/A; Fits 1987-1990 Chevrolet Astro, N/A; Fits 1987-1990 GMC S15, N/A; Fits 1987-1990 GMC Safari, N/A; Fits 1985-1990 Lincoln Town Car, N/A; Fits 1987-1989 GMC S15 Jimmy, N/A; Fits 1989 Pontiac Firebird, N/A; Fits 1988 Buick LeSabre, N/A; Fits 1986-1988 Buick LeSabre, N/A; Fits 1986-1988 Buick Skylark, N/A; Fits 1987-1988 Chevrolet S10 Blazer, N/A; Fits 1988 Oldsmobile Cutlass Calais, N/A; Fits 1986-1988 Oldsmobile Cutlass Ciera, N/A; Fits 1988 Oldsmobile Delta 88, N/A; Fits 1987-1988 Pontiac Bonneville, N/A; Fits 1985-1987 Buick Regal, N/A; Fits 1986-1987 Buick Riviera, N/A; Fits 1985-1987 Ford Ranger, N/A; Fits 1986-1987 Oldsmobile 98, N/A; Fits 1985-1987 Oldsmobile Calais, N/A; Fits 1986-1987 Oldsmobile Toronado, N/A; Fits 1985-1987 Pontiac Grand Am, N/A; Fits 1985-1986 Cadillac Cimarron, N/A; Fits 1985-1986 Chevrolet Cavalier, N/A; Fits 1985-1986 Ford LTD, N/A; Fits 1985-1986 Mercury Grand Marquis, N/A; Fits 1986 Mercury Sable, N/A; Fits 1985-1986 Oldsmobile Firenza, N/A

Quality Assurance

Dayco is a recognized name in accessory drive belt system components, and this pulley is built to the listed material and bearing specifications for the application. Part number 89001 is also listed as a cross-reference to Gates 38012 for the same application.