Dayco PB1023N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1023N

The Dayco PB1023N is a premium OEM replacement harmonic balancer for classic GM V8 applications that use a single-groove V-belt drive. It is built with a cast iron outer ring, neutral balance, and timing marks for accurate service work on compatible Buick, Chevrolet, GMC, Oldsmobile, and Pontiac engines.

Key Features

• Part number PB1023N from Dayco Premium OEM Replacement Balancer
• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine service
• Single integrated pulley with 1 V-belt groove
• Timing marks included for setup and verification
• Crank bore: 1.245 in. / 31.60 mm
• Nose outside diameter: 1.763 in. / 44.78 mm
• Overall outside diameter: 6.686 in. / 169.80 mm
• Overall width: 1.312 in. / 33.30 mm
• 3-bolt hole quantity

Product Details

Dayco PB1023N is an engine harmonic balancer for vehicles that require a single-groove pulley and neutral balance. The Premium OEM Replacement Balancer line focuses on direct-fit service parts for original-style engine layouts, and this unit includes timing marks while omitting a crank trigger/exciter plate and woodruff key. It cross-references Pioneer DA-2500 for the same application. Compatible vehicle coverage includes 1965-1971 Chevrolet Impala, 1967-1971 Chevrolet Camaro, 1968-1971 Pontiac Firebird, 1967-1971 GMC G15/G1500 Van, and other listed Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models. The PB1023N is a practical choice when replacing a worn harmonic balancer on classic Chevrolet Bel Air, Chevrolet El Camino, and Pontiac LeMans engines with the correct pulley configuration.

Common Problems This Part Can Address

• Worn or cracked harmonic balancer outer ring
• Timing mark visibility issues during ignition setup
• Vibration from a deteriorated balancer assembly
• Belt alignment concerns on single-groove V-belt systems
• Service replacement needs for original-style GM engine builds

Installation Notes and Tips

Verify crank bore, nose diameter, pulley groove count, and balance type before installation. This balancer uses 3 bolt holes, includes no hardware, and does not include installation instructions. Confirm the engine is set up for a neutral-balance balancer with a single V-belt pulley and timing marks before assembly. For best results, inspect the crank snout, keyway area, and belt drive components for wear before installing PB1023N.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for service replacement applications where original-style fit and function matter. PB1023N is specified with defined dimensions, balance type, and pulley configuration to support accurate parts matching for classic GM engine service.