Dayco PB1018N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1018N

The Dayco PB1018N engine harmonic balancer is a Premium OEM Replacement Balancer built for select Chevrolet and GMC applications from 1966-1990. It is engineered with a hub-weighted counterweight balance, grey iron outer ring material, and timing marks for accurate service and replacement work.

Key Features

• Part number: PB1018N
• Premium OEM Replacement Balancer line from Dayco
• Hub weighted counterweight balance
• Grey iron outer ring material
• Timing marks included
• 3 bolt holes
• Crank bore: 1.599 in. (40.61 mm)
• Nose outside diameter: 2.333 in. (59.25 mm)
• Overall outside diameter: 7.993 in. (203.00 mm)
• Overall width: 2.686 in. (68.20 mm)
• Ring width: 1.732 in. (43.99 mm)
• No integrated pulleys

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine service parts for vehicles that need OE-style dimensions and balance characteristics. The PB1018N harmonic balancer is specified for a wide range of Chevrolet C10, C20, K20, K30, Caprice, Impala, Monte Carlo, Corvette, Blazer, and GMC truck and van applications, including many 8-inch diameter, counterweighted configurations. This part cross-references Dorman 594-010 and Pioneer DA-4541 for the same application.

Compatible With select Chevrolet and GMC models including 1970-1974 Chevrolet Corvette, 1975-1980 Chevrolet C10, 1987-1988 Chevrolet R30, 1982-1985 GMC C2500, and 1987-1990 GMC R3500. The PB1018N is also listed for additional Chevrolet C1500, C3500, G30, K3500, P30, and GMC G3500 applications across the covered years.

Common Problems This Part Addresses

• Crankshaft vibration from a worn or separated balancer
• Timing mark visibility issues during ignition or engine service
• Rubber bond deterioration in an aging harmonic balancer assembly
• Incorrect fitment when replacing an OE-style 8-inch counterweighted balancer
• Noise or imbalance concerns related to crankshaft damping

Installation Notes and Tips

Verify crank bore, nose diameter, bolt hole quantity, and overall diameter before installation. This balancer does not include hardware, installation instructions, a crank trigger/exciter plate, or a Woodruff key. It also has no integrated pulleys, so confirm accessory drive setup and pulley alignment during service. Use the vehicle’s service specifications and timing marks to complete installation correctly.

Quality Assurance

Dayco manufactures the PB1018N as part of its Premium OEM Replacement Balancer line, with OE-style dimensions and balance specifications for service replacement use. Confirm all measurements and application details against the vehicle before installation.