Dayco PB1181N Engine Harmonic Balancer

Dayco PB1181N Harmonic Balancer

The Dayco PB1181N is a premium OEM replacement harmonic balancer for select Chevrolet and GMC applications. It is built with a cast iron outer ring, hub-weighted counterweight balance, and timing marks for accurate engine service and crankshaft vibration control.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Part Number: PB1181N
• Cast iron outer ring construction
• Hub weighted counterweight balance
• Timing marks included for service reference
• 3 bolt hole quantity
• Crank bore: 1.245 in. (31.60 mm)
• Nose outside diameter: 1.763 in. (44.78 mm)
• Overall outside diameter: 6.142 in. (156.00 mm)
• Overall width: 2.790 in. (70.86 mm)
• Ring width: 1.280 in. (32.49 mm)

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine service parts built to match original equipment dimensions and function. The PB1181N harmonic balancer is specified for engines that require a 3-bolt design, hub-weighted balance, and timing marks, making it a practical choice for restoring crankshaft damping and maintaining proper engine timing reference. This part number, PB1181N, is listed for select Chevrolet G10, G20, G30, P30, Astro, S10 Blazer, and GMC G1500, G2500, G3500, P3500, Jimmy, Safari, and Sonoma applications.

This part cross-references Pioneer (e.g., DA-2622) for the same application.

Vehicle Fitment

• Fits 1995-1996 Chevrolet G30, N/A
• Fits 1995 Chevrolet G10, N/A
• Fits 1995 Chevrolet G20, N/A
• Fits 1995 Chevrolet P30, N/A
• Fits 1994 Chevrolet Astro, N/A
• Fits 1992-1994 Chevrolet S10 Blazer, N/A, 7 bolt
• Fits 1995 GMC G1500, N/A
• Fits 1995 GMC G2500, N/A
• Fits 1995 GMC G3500, N/A
• Fits 1995 GMC P3500, N/A, w/o Balance Shaft
• Fits 1992-1994 GMC Jimmy, N/A
• Fits 1994 GMC Safari, N/A, w/o Balance Shaft
• Fits 1992-1994 GMC Sonoma, N/A, 2nd Design

Installation Notes

Verify crank bore, nose diameter, bolt-hole count, and timing-mark alignment before installation. This harmonic balancer does not include hardware, installation instructions, a crank trigger/exciter plate, or a Woodruff key. Confirm engine configuration details such as balance shaft presence and the 7-bolt or 2nd design notes shown in the fitment data before ordering.

Quality Assurance

Dayco manufactures this Premium OEM Replacement Balancer to support OE-style fitment and service requirements for the listed Chevrolet and GMC vehicles. The PB1181N is built with timing marks and cast iron ring construction for dependable engine service work.