Dayco PB1074N Engine Harmonic Balancer

Dayco PB1074N Harmonic Balancer Overview

The Dayco PB1074N is a premium OEM replacement harmonic balancer for select Buick, Oldsmobile, and Pontiac applications from 1988-1990. Built with a hub-weighted counterweight balance and a cast iron outer ring, it is specified for engines that use a 3-bolt pattern and a serpentine pulley setup.

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine vibration control and OE-style service replacement for vehicles such as the Buick LeSabre, Buick Reatta, Buick Riviera, Oldsmobile 98, Oldsmobile Delta 88, Oldsmobile Toronado, and Pontiac Bonneville.

• Part number: PB1074N
• Engine harmonic balancer with hub weighted counterweight balance
• Cast iron outer ring for OE-style construction
• Integrated serpentine pulley with 6 grooves
• Crank trigger/exciter plate included
• 3 bolt hole quantity
• Installation instructions included
• Overall outside diameter: 179.50 mm (7.067 in.)
• Overall width: 85.50 mm (3.367 in.)
• Crank bore: 34.92 mm (1.375 in.)

Fitment and Application Details

Compatible with 1988-1990 Buick LeSabre, 1988-1990 Buick Reatta, 1988-1990 Buick Riviera, 1988-1990 Oldsmobile 98, 1988-1990 Oldsmobile Delta 88, 1988-1990 Oldsmobile Toronado, and 1988-1990 Pontiac Bonneville. This part cross-references Dorman 594-001 and ATP 102068 for the same application.

What This Harmonic Balancer Helps Address

• Engine vibration caused by a worn or damaged balancer
• Crankshaft damping issues that can affect smooth engine operation
• Serpentine belt drive concerns tied to pulley wear or imbalance
• Trigger signal setup needs where a crank trigger/exciter plate is required
• Replacement needs for OE-style service on 1988-1990 Buick, Oldsmobile, and Pontiac vehicles

Installation Notes and Tips

Verify crank bore, nose outside diameter, pulley groove count, and bolt pattern before installation. This PB1074N harmonic balancer does not include hardware, and timing marks are not provided. Installation instructions are included, and proper alignment of the serpentine pulley and crank trigger/exciter plate should be confirmed during service.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement use in OE-style engine service. The PB1074N follows the listed dimensional and fitment specifications for confirmed applications, including Buick LeSabre, Buick Reatta, Buick Riviera, Oldsmobile 98, Oldsmobile Delta 88, Oldsmobile Toronado, and Pontiac Bonneville.