Dayco PB1091N Engine Harmonic Balancer

Dayco PB1091N Harmonic Balancer

The Dayco PB1091N is a premium OEM replacement harmonic balancer for select Toyota applications. It is built with a cast iron outer ring, neutral balance, and dual integrated V-belt pulleys to match the original engine layout on covered Toyota 4Runner, Pickup, Celica, and Corona models.

Key Features

• Premium OEM replacement balancer from Dayco
• Part number PB1091N for accurate ordering and lookup
• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine service
• Two integrated V-belt pulleys
• Timing marks included for service alignment
• Crank bore: 1.221 in. (31.01 mm)
• Overall outside diameter: 6.083 in. (154.50 mm)
• Overall width: 2.284 in. (58.00 mm)

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine components that match original dimensions and pulley configuration. The PB1091N uses a 4-bolt hole pattern, a 1.770 in. nose outside diameter, and dual one-groove V-belt pulleys sized at 5.375 in. and 5.965 in. outside diameter. Timing marks are included, while the unit does not use a crank trigger/exciter plate or woodruff key. This part cross-references Dorman 594-073 for the same application.

Compatible With Toyota 4Runner, Toyota Pickup, Toyota Celica, and Toyota Corona applications across the listed years, this harmonic balancer is a direct replacement choice for engines that require the original pulley and timing-mark layout. Use PB1091N when replacing a worn or damaged balancer on 1991-1995 Toyota 4Runner, 1990-1995 Toyota Pickup, 1977-1985 Toyota Celica, and other covered Toyota engine applications.

Common Problems This Part Can Address

• Crankshaft vibration from a worn harmonic balancer
• Damaged or slipping V-belt pulley surfaces
• Missing or hard-to-read timing marks
• Noise caused by a deteriorated balancer assembly
• Fitment issues when restoring original Toyota engine accessory drive layout

Installation Notes and Tips

Verify crank bore, nose diameter, pulley alignment, and bolt-hole pattern before installation. Confirm whether your Toyota 4Runner or Pickup application requires air pump, air conditioning, or power steering provisions, since the fitment list includes multiple engine configurations. Inspect the crank snout, pulley alignment, and belt condition during replacement, and transfer any required service components separately because hardware is not included.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built to match original equipment dimensions and service features for accurate replacement on covered Toyota engines. The PB1091N includes timing marks and the specified pulley configuration for dependable service fitment.