Dayco PB1018ST Engine Harmonic Balancer

Dayco Street Performance Balancer PB1018ST

The Dayco PB1018ST Street Performance Balancer is an engine harmonic balancer built for Chevrolet and GMC V8 applications that require a hub-weighted design and timing mark visibility. It is a direct-fit option for a wide range of classic and heavy-duty trucks, vans, and passenger vehicles from 1966 through 1990.

Key Features

• Hub-weighted counterweight balance for street performance engine setups
• Cast iron outer ring material for durable crankshaft damping
• Timing marks included for easier ignition setup and service work
• 3-bolt hole design
• Crank bore measures 1.599 in. / 40.60 mm
• Overall outside diameter measures 7.963 in. / 202.25 mm
• Overall width measures 2.686 in. / 68.20 mm
• No integrated pulleys, crank trigger plate, hardware, or Woodruff key included

Product Details

Dayco’s Street Performance Balancer line is aimed at engines that need a reliable harmonic balancer with performance-oriented construction and service-friendly timing marks. The PB1018ST uses a cast iron outer ring and hub-weighted balance to help control crankshaft vibration in compatible Chevrolet and GMC applications, including C10, C20, K30, P30, C3500, K3500, and related models. This part number, PB1018ST, is also referenced for select Dorman and Pioneer applications, including Dorman 594-010S and Pioneer 872006 / DA-4541HD.

Vehicle Fitment

• Fits 1990 Chevrolet C1500, N/A
• Fits 1990 Chevrolet C3500, N/A
• Fits 1990 Chevrolet G30, N/A
• Fits 1988 Chevrolet G30, N/A
• Fits 1975-1976 Chevrolet G30, N/A
• Fits 1990 Chevrolet K3500, N/A
• Fits 1975-1990 Chevrolet P30, N/A
• Fits 1990 Chevrolet R2500 Suburban, N/A
• Fits 1990 Chevrolet R3500, N/A
• Fits 1990 Chevrolet V2500 Suburban, N/A
• Fits 1990 Chevrolet V3500, N/A
• Fits 1989-1990 GMC C3500, N/A
• Fits 1982-1985 GMC C3500, N/A
• Fits 1990 GMC G3500, N/A
• Fits 1989-1990 GMC K3500, N/A
• Fits 1982-1985 GMC K3500, N/A
• Fits 1986-1990 GMC P3500, N/A
• Fits 1979-1981 GMC P3500, N/A
• Fits 1990 GMC R2500 Suburban, N/A
• Fits 1987-1990 GMC R3500, N/A
• Fits 1990 GMC V3500, N/A
• Fits 1988-1989 Chevrolet C3500, N/A
• Fits 1989 Chevrolet G30, N/A
• Fits 1988-1989 Chevrolet K3500, N/A
• Fits 1989 Chevrolet R2500, N/A
• Fits 1989 Chevrolet R2500 Suburban, N/A
• Fits 1989 Chevrolet R3500, N/A
• Fits 1989 Chevrolet V3500, N/A
• Fits 1988-1989 GMC G3500, N/A
• Fits 1987-1989 GMC R2500, N/A
• Fits 1987-1989 GMC R2500 Suburban, N/A
• Fits 1987-1989 GMC V3500, N/A
• Fits 1987-1988 Chevrolet R20, N/A
• Fits 1987-1988 Chevrolet R20 Suburban, N/A
• Fits 1987-1988 Chevrolet R30, N/A
• Fits 1987-1988 Chevrolet V20 Suburban, N/A
• Fits 1987-1988 Chevrolet V30, N/A
• Fits 1988 GMC C3500, N/A
• Fits 1986 GMC C3500, N/A
• Fits 1979-1981 GMC C3500, N/A
• Fits 1988 GMC K3500, N/A
• Fits 1986 GMC K3500, N/A
• Fits 1979-1981 GMC K3500, N/A
• Fits 1986 Chevrolet C20, N/A
• Fits 1986 Chevrolet C20 Suburban, N/A
• Fits 1986 Chevrolet C30, N/A
• Fits 1986 Chevrolet K30, N/A
• Fits 1986 GMC C2500, N/A
• Fits 1979-1981 GMC C2500, N/A
• Fits 1986 GMC C2500 Suburban, N/A
• Fits 1979-1981 GMC C2500 Suburban, N/A
• Fits 1975-1985 Chevrolet C20, N/A
• Fits 1973-1985 Chevrolet C20 Suburban, N/A
• Fits 1975-1985 Chevrolet C30, N/A
• Fits 1985 Chevrolet K20 Suburban, N/A
• Fits 1973-1974 Chevrolet K20 Suburban, N/A
• Fits 1980-1985 Chevrolet K30, N/A
• Fits 1977 Chevrolet K30, N/A
• Fits 1982-1985 GMC C2500, N/A
• Fits 1982-1985 GMC C2500 Suburban, N/A
• Fits 1982-1985 GMC P3500, N/A
• Fits 1975-1980 Chevrolet C10, N/A
• Fits 1973-1980 Chevrolet C10 Suburban, N/A
• Fits 1980 Chevrolet K10, N/A
• Fits 1976 Chevrolet K10, N/A
• Fits 1979-1980 GMC C1500, N/A
• Fits 1979-1980 GMC C1500 Suburban, N/A
• Fits 1980 GMC K1500, N/A
• Fits 1979 Chevrolet P20, N/A
• Fits 1976 Chevrolet P20, N/A
• Fits 1979 GMC P1500, N/A
• Fits 1976-1978 Chevrolet K20, N/A
• Fits 1976-1978 Chevrolet K5 Blazer, N/A
• Fits 1975-1976 Chevrolet Caprice, N/A
• Fits 1976 Chevrolet G20, N/A
• Fits 1975-1976 Chevrolet Impala, N/A
• Fits 1975-1976 GMC G25, N/A
• Fits 1976 GMC G35, N/A
• Fits 1976 GMC Jimmy, N/A
• Fits 1974 GMC Jimmy, N/A
• Fits 1975 Chevrolet Bel Air, N/A
• Fits 1970-1975 Chevrolet El Camino, N/A
• Fits 1975 Chevrolet Malibu, N/A
• Fits 1975 Chevrolet Monte Carlo, N/A
• Fits 1971-1974 Chevrolet Bel Air, N/A
• Fits 1966 Chevrolet Bel Air, N/A
• Fits 1974 Chevrolet Blazer, N/A
• Fits 1970-1974 Chevrolet Caprice, N/A
• Fits 1970-1974 Chevrolet Corvette, N/A
• Fits 1970-1974 Chevrolet Impala, N/A
• Fits 1973-1974 Chevrolet K10 Suburban, N/A
• Fits 1973-1974 Chevrolet Malibu, N/A
• Fits 1970-1974 Chevrolet Monte Carlo, N/A
• Fits 1974 GMC G35/G3500 Van, N/A
• Fits 1973 Chevrolet Blazer, N/A
• Fits 1973 GMC Jimmy, N/A
• Fits 1970 Chevrolet Bel Air, N/A

Common Uses

• Replacing a worn harmonic balancer on a Chevrolet C10 or GMC C1500 engine
• Restoring proper crankshaft vibration control in classic Chevrolet and GMC trucks
• Maintaining accurate timing reference during ignition service
• Addressing balancer wear on street-driven performance and heavy-duty V8 applications

Installation Notes

Verify crank bore, nose outside diameter, bolt hole quantity, and overall diameter before installation. This PB1018ST does not include hardware, installation instructions, a crank trigger/exciter plate, or a Woodruff key, so reuse or source the required engine-specific components separately. Confirm timing mark orientation and pulley alignment during assembly, especially on Chevrolet C20, K30, P30, and GMC C3500 applications.

Quality Assurance

Dayco manufactures the Street Performance Balancer line with application-specific dimensions and timing marks for service accuracy. The PB1018ST is built with a cast iron outer ring and hub-weighted balance for compatible Chevrolet and GMC engines.