Dayco PB1056N Engine Harmonic Balancer

Dayco PB1056N Harmonic Balancer Overview

The Dayco PB1056N is a premium OEM replacement harmonic balancer for classic Pontiac V8 applications and select Buick and Oldsmobile models. Built with a cast iron outer ring and neutral balance, it supports accurate crankshaft damping and timing mark visibility for service work.

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine vibration control components that match original-style service requirements. The PB1056N is a practical choice for restoring proper harmonic balance on Pontiac Firebird, GTO, Grand Prix, LeMans, and related applications.

Key Features

• Engine harmonic balancer with neutral, no-counterweight balance
• Cast iron outer ring for durable engine service use
• Timing marks included for ignition and engine setup
• 4-bolt hole design
• Crank bore: 1.375 in. / 34.90 mm
• Nose outside diameter: 1.867 in. / 47.41 mm
• Overall outside diameter: 6.790 in. / 172.45 mm
• Overall width: 3.154 in. / 80.10 mm
• Ring width: 1.130 in. / 28.68 mm
• No integrated pulleys, crank trigger plate, or woodruff key included

Detailed Description

Dayco PB1056N harmonic balancer is engineered for engine applications that require a neutral-balance replacement with original-style dimensions and timing reference marks. It is commonly selected for Pontiac Firebird 1968-1979, Pontiac GTO 1968-1973, Pontiac Grand Prix 1968-1977, Pontiac LeMans 1968-1977, and Pontiac Grand Am 1973-1975. It also covers Pontiac Bonneville, Catalina, Laurentian, Parisienne, and select Buick and Oldsmobile full-size models listed in the fitment data. This part cross-references ATP 102037 and Dorman 594-158 for the same application.

What It Helps Address

• Crankshaft vibration from a worn or deteriorated balancer
• Timing mark visibility issues during ignition setup
• Engine accessory alignment concerns when the original balancer is damaged
• Service replacement needs on Pontiac, Buick, and Oldsmobile V8 applications
• Restoration work requiring an OE-style harmonic balancer

Installation Notes and Tips

Verify crank bore, nose diameter, bolt hole pattern, and overall dimensions before installation. Confirm the timing marks align with your engine setup, and reuse or source any required fasteners separately since hardware is not included. Because no installation instructions are included, follow the vehicle service manual and use proper balancer installation tools to avoid crankshaft or seal damage.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service in applications that demand original-style fit and function. The PB1056N is a Dayco harmonic balancer identified by part number PB1056N for accurate catalog matching and service verification.

Compatible With Pontiac Firebird, Pontiac Bonneville, Pontiac Catalina, Pontiac Grand LeMans, Pontiac Grand Prix, Pontiac Laurentian, Pontiac LeMans, Pontiac Parisienne, Buick LeSabre, Oldsmobile 98, Oldsmobile Custom Cruiser, Oldsmobile Delta 88, Pontiac Grand Am, Pontiac GTO, and Pontiac Catalina w/o Ram Air applications listed in the fitment data.