Dayco PB2221N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB2221N

The Dayco PB2221N engine harmonic balancer is a premium OEM replacement balancer built for GM V8 applications that need accurate crankshaft damping and timing reference. It features a neutral balance design, a grey iron outer ring, and timing marks for service-friendly installation and verification.

Key Features

• Part number: PB2221N
• Premium OEM Replacement Balancer line from Dayco
• Neutral balance with no counterweight
• Grey iron outer ring construction
• Timing marks included
• 3-bolt hole quantity
• Crank bore: 1.245 in. (31.60 mm)
• Nose outside diameter: 1.763 in. (44.78 mm)
• Overall outside diameter: 6.750 in. (171.45 mm)
• Overall width: 2.343 in. (59.50 mm)
• Ring width: 1.189 in. (30.18 mm)
• No integrated pulleys, trigger plate, hardware, or woodruff key included

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit replacement parts for engine service work, and the PB2221N follows that approach with OE-style dimensions and a neutral balance configuration. This engine harmonic balancer is used on a wide range of Chevrolet and GMC trucks, vans, and performance cars, including Chevrolet C1500, C2500, K1500, K2500, Camaro, Corvette, and GMC G1500 and G2500 applications. This part cross-references ATP 102075 and Dorman 594-012 for the same application.

Compatible With 1969-1995 Chevrolet and GMC V8 applications listed in the fitment data, including 1974 Chevrolet Camaro, 1976 Chevrolet Nova, 1988-1995 Chevrolet C1500, and 1988-1995 GMC K2500. The PB2221N is also listed for 1975-1992 Chevrolet Camaro and Pontiac Firebird, plus several Chevrolet and GMC van and truck platforms from the 1970s through the mid-1990s.

What It Helps Address

• Crankshaft vibration control issues caused by a worn or failing balancer
• Timing mark visibility problems during ignition or engine service
• Noise or belt drive irregularities related to balancer wear
• Replacement needs on GM truck, van, and performance car engines
• OE-style service replacement for neutral-balance crankshaft setups

Installation Notes

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. Confirm that the application calls for a 6.75-inch diameter neutral balancer and use the timing marks during setup and final engine verification.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is positioned as an OE-style service solution for engine repair and replacement work. The PB2221N is built with a grey iron outer ring and factory-style dimensions to support accurate fitment on the listed Chevrolet and GMC applications.