Dayco PB1083N Engine Harmonic Balancer

Dayco PB1083N Harmonic Balancer Overview

The Dayco PB1083N is a premium OEM replacement harmonic balancer for select GM vehicles from 1990-1992. It is built with a hub-weighted counterweight balance, a cast iron outer ring, and a single 6-groove serpentine pulley to support crankshaft damping and accessory drive alignment.

Compatible With Buick LeSabre, Park Avenue, Regal, Riviera, and Reatta; Oldsmobile 88, 98, Delta 88, Toronado, and Silhouette; Pontiac Bonneville and Trans Sport; and Chevrolet Lumina APV applications listed below. The Dayco Premium OEM Replacement Balancer line focuses on direct-fit replacement parts for engine service work where OE-style dimensions and pulley configuration matter.

Key Features

• Part number PB1083N for direct reference and ordering
• Hub-weighted counterweight balance for OE-style crankshaft damping
• Cast iron outer ring for durable engine service use
• Integrated 6-groove serpentine pulley with one pulley surface
• Crank trigger/exciter plate included
• 3-bolt hole design
• Installation instructions included
• Overall outside diameter: 7.067 in. (179.50 mm)
• Overall width: 3.365 in. (85.45 mm)
• Crank bore: 1.373 in. (34.86 mm)

Detailed Description

Dayco PB1083N is an engine harmonic balancer for the cylinder block component category, built to match the fitment and pulley layout used on select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. The balancer measures 7.067 inches in overall outside diameter, 3.365 inches in overall width, and uses a 1.373-inch crank bore with a 1.934-inch nose outside diameter. Its single integrated serpentine pulley has 6 grooves and a 6.930-inch outside diameter, supporting accessory belt routing on the listed applications.

This part cross-references ATP 102072 and Dorman 594-005 for the same application. If you are replacing a worn harmonic balancer on a 1991 Buick LeSabre, 1992 Oldsmobile 88, or 1991 Pontiac Bonneville, PB1083N provides the OE-style dimensions and trigger plate configuration needed for a proper service replacement.

Vehicle Fitment

• Fits 1991-1992 Buick LeSabre, N/A
• Fits 1991-1992 Buick Park Avenue, N/A
• Fits 1990-1992 Buick Regal, N/A
• Fits 1991-1992 Buick Riviera, N/A
• Fits 1992 Chevrolet Lumina APV, N/A
• Fits 1992 Oldsmobile 88, N/A
• Fits 1991-1992 Oldsmobile 98, N/A
• Fits 1992 Oldsmobile Silhouette, N/A
• Fits 1991-1992 Oldsmobile Toronado, N/A
• Fits 1991-1992 Pontiac Bonneville, N/A
• Fits 1992 Pontiac Trans Sport, N/A
• Fits 1991 Buick Reatta, N/A
• Fits 1991 Oldsmobile Delta 88, N/A

Installation Notes and Tips

Verify crank bore, pulley groove count, overall diameter, and trigger plate requirements before installation. The PB1083N does not include hardware or a Woodruff key, so reuse or source the correct engine-specific components as needed. Installation instructions are included, and the balancer should be installed with the proper tools to avoid damage to the crank snout or pulley surfaces.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service on applications that require OE-style fit and function. PB1083N is manufactured with a cast iron outer ring and integrated trigger/exciter plate to match the listed vehicle applications and engine configuration.