Dayco PB1012N Engine Harmonic Balancer

Dayco PB1012N Premium OEM Replacement Balancer

The Dayco PB1012N is a premium OEM replacement harmonic balancer for classic Chevrolet and GMC engine applications. It is built with a grey iron outer ring, neutral balance, and timing marks for accurate engine service and dependable crankshaft damping.

Key Features

• Part number PB1012N from Dayco Premium OEM Replacement Balancer line
• Neutral balance with no counterweight
• 3-bolt hole design
• Grey iron outer ring for durable construction
• Timing marks included for service alignment
• Crank bore: 1.245 in. (31.60 mm)
• Overall outside diameter: 6.119 in. (155.40 mm)
• Overall width: 2.343 in. (59.50 mm)
• Ring width: 0.756 in. (19.18 mm)
• No integrated pulleys, crank trigger/exciter plate, hardware, or woodruff key included

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine service parts that match original-style dimensions and function. The PB1012N harmonic balancer is specified for a range of Chevrolet and GMC vehicles, including Chevrolet Camaro, Chevrolet El Camino, Chevrolet Nova, Chevrolet Bel Air, Chevrolet Impala, Chevrolet Corvette, GMC Jimmy, and GMC G25/G2500 Van applications listed in the fitment data. This part cross-references Dorman 594-156 for the same application.

Use PB1012N when you need a replacement engine harmonic balancer with neutral balance and timing reference marks for classic small-block and related engine service. The part number PB1012N also appears in interchange listings with ATP 102044 and ATP 102049, and Pioneer DA-3270.

Common Uses

• Replacing a worn or cracked harmonic balancer
• Restoring crankshaft vibration damping
• Correcting timing mark visibility during ignition service
• Addressing pulley alignment concerns on original-style engine setups
• Servicing Chevrolet and GMC classic vehicle engine rebuilds

Installation Notes

Verify crank bore, nose outside diameter, bolt-hole pattern, and overall diameter before installation. The PB1012N does not include hardware, installation instructions, a crank trigger/exciter plate, or a woodruff key, so reuse or source the required engine-specific components as needed. Confirm timing mark orientation and balance type against the engine specification before final assembly.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for OE-style service replacement, with published dimensional specifications to support accurate part matching. Confirm fitment against the vehicle and engine combination before installation.

Compatible Vehicles

• Fits 1975-1976 Chevrolet Monza, N/A
• Fits 1975 Chevrolet Nova, N/A
• Fits 1969-1973 Chevrolet Nova, N/A
• Fits 1969-1973 Chevrolet Blazer, N/A
• Fits 1969-1973 Chevrolet C10 Suburban, N/A
• Fits 1969-1973 Chevrolet C20 Suburban, N/A
• Fits 1969-1973 Chevrolet Camaro, N/A
• Fits 1969-1973 Chevrolet El Camino, N/A
• Fits 1964 Chevrolet El Camino, N/A
• Fits 1970-1973 Chevrolet K10 Suburban, N/A
• Fits 1968 Chevrolet K10 Suburban, N/A
• Fits 1968-1973 Chevrolet K20 Suburban, N/A
• Fits 1973 Chevrolet Malibu, N/A
• Fits 1964-1967 Chevrolet Malibu, N/A
• Fits 1968-1973 GMC G15/G1500 Van, N/A
• Fits 1972-1973 GMC G35/G3500 Van, N/A
• Fits 1970-1973 GMC Jimmy, N/A
• Fits 1970-1972 GMC G25/G2500 Van, N/A
• Fits 1963-1970 Chevrolet Bel Air, N/A
• Fits 1967-1969 Chevrolet Camaro, N/A
• Fits 1966-1969 Chevrolet Caprice, N/A
• Fits 1962-1969 Chevrolet Impala, N/A
• Fits 1965-1968 Chevrolet Corvette, N/A
• Fits 1962-1963 Chevrolet Corvette, N/A
• Fits 1965-1968 Chevrolet El Camino, N/A
• Fits 1964 Chevrolet Corvette, N/A
• Fits 1962 Chevrolet Bel Air, N/A