Dayco PB1207N Engine Harmonic Balancer

Dayco PB1207N Harmonic Balancer Overview

The Dayco PB1207N is a premium OEM replacement harmonic balancer for select GM applications, built for engines that rely on accurate crankshaft vibration control and accessory drive alignment. It is a direct-fit engine harmonic balancer for vehicles such as the Pontiac Bonneville, Buick LeSabre, Buick Park Avenue, Buick Regal, Chevrolet Lumina APV, Oldsmobile 88, Oldsmobile 98, Oldsmobile Silhouette, Pontiac Trans Sport, and Buick Riviera.

Dayco’s Premium OEM Replacement Balancer line focuses on OE-style fit and function for service replacement needs. The PB1207N follows that approach with hub-weighted balance, a cast iron outer ring, and an integrated 6-groove serpentine pulley for applications that use a crank trigger/exciter plate.

Key Features

• Premium OEM replacement harmonic balancer for select GM V6/V8 applications
• Hub weighted counterweight balance for crankshaft vibration control
• Cast iron outer ring for durable service use
• Integrated 6-groove serpentine pulley
• Crank trigger/exciter plate provision included
• 3-bolt hole design
• Installation instructions included
• Dayco PB1207N part number for accurate ordering and lookup

Detailed Product Description

The Dayco PB1207N harmonic balancer is engineered to replace worn or damaged factory balancers on compatible GM vehicles while maintaining the original accessory drive geometry. Key dimensions include a 1.373-inch crank bore, 1.934-inch nose outside diameter, 7.067-inch overall outside diameter, and 3.365-inch overall width. The pulley measures 6.930 inches outside diameter with 6 grooves, supporting serpentine belt systems used in the listed applications.

This balancer is a practical choice for drivers searching for a 1993-1995 Pontiac Bonneville harmonic balancer, a 1993-1994 Buick Regal crankshaft balancer, or a 1993-1994 Oldsmobile Silhouette engine harmonic balancer. It also cross-references ATP 102073 and Dorman 594-034 for the same application. The PB1207N is built for direct replacement service where crankshaft damping, pulley alignment, and trigger compatibility matter.

Vehicle Fitment

• Fits 1995 Pontiac Bonneville, N/A; SFI; Premium OEM Replacement Balancer
• Fits 1993-1994 Buick LeSabre, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Buick Park Avenue, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Buick Regal, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Chevrolet Lumina APV, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Oldsmobile 88, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Oldsmobile 98, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Oldsmobile Silhouette, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Pontiac Bonneville, N/A; Premium OEM Replacement Balancer
• Fits 1993-1994 Pontiac Trans Sport, N/A; Premium OEM Replacement Balancer
• Fits 1993 Buick Riviera, N/A; Premium OEM Replacement Balancer

Common Issues This Part Can Address

• Crankshaft vibration from a worn or separated balancer
• Belt tracking problems caused by pulley wear or misalignment
• Trigger signal concerns on applications using a crank trigger/exciter plate
• Noise or wobble at the front of the engine from a deteriorated harmonic balancer
• Service replacement needs for aging GM engine accessory drive components

Installation Notes

Verify crank bore, nose diameter, pulley groove count, and trigger/exciter plate requirements before installation. Use the included installation instructions and confirm that the crankshaft snout and keyway area are clean and free of damage. Hardware is not included, and timing marks are not provided on this balancer.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for OE-style service replacement on the listed applications. The PB1207N is designed around the published dimensions and fitment data to support proper installation on compatible Pontiac, Buick, Chevrolet, and Oldsmobile vehicles.