Dayco PB1645N Engine Harmonic Balancer

Dayco PB1645N Harmonic Balancer Overview

The Dayco PB1645N is a premium OEM replacement harmonic balancer for Ford Super Duty diesel applications. It is built with a hub-weighted counterweight balance, a cast iron outer ring, and an integrated 8-groove serpentine pulley for dependable crankshaft vibration control and accessory drive operation.

Compatible with 2011-2026 Ford F-250 Super Duty and 2011-2026 Ford F-350 Super Duty applications, this balancer matches the fitment needs of heavy-duty Ford truck owners looking for a direct replacement part. The PB1645N is also a cross-reference for Dorman 594-517 for the same application.

Key Features

• Dayco Premium OEM Replacement Balancer line for OE-style service replacement
• Part number PB1645N
• Hub weighted counterweight balance for crankshaft damping support
• Cast iron outer ring for durable construction
• Integrated serpentine pulley with 8 grooves
• 4 bolt hole design
• Crank bore: 64.00 mm (2.520 in.)
• Overall outside diameter: 208.00 mm (8.189 in.)
• Overall width: 78.00 mm (3.071 in.)

Detailed Description

Dayco PB1645N is an engine harmonic balancer engineered for Ford F-250 Super Duty and Ford F-350 Super Duty fitments from 2011 through 2026. The Premium OEM Replacement Balancer line focuses on direct-fit service parts that match the original application layout, including the integrated serpentine pulley and hub-weighted balance design. The cast iron outer ring and 78.00 mm ring width provide a robust structure for crankshaft vibration damping in demanding truck use.

This part number, PB1645N, is a practical replacement choice when servicing the front of the engine on Ford Super Duty models that use a 4-bolt, 8-groove serpentine harmonic balancer configuration. It is also referenced by Dorman 594-517 for the same application.

What It Is Used For

• Replacing a worn or damaged engine harmonic balancer
• Restoring crankshaft vibration damping performance
• Addressing serpentine pulley wear or drive alignment concerns
• Correcting noise or imbalance at the front of the engine
• Servicing Ford Super Duty front-end engine components during repair

Installation Notes and Tips

Verify crank bore, bolt hole count, pulley groove count, and overall dimensions before installation. This balancer does not include hardware, installation instructions, timing marks, or a Woodruff key. Use the correct service tools and follow the vehicle manufacturer’s repair procedure for removal and installation on Ford F-250 Super Duty and Ford F-350 Super Duty applications.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is positioned as an OE-style service solution for engine repair applications. The PB1645N is built to match the specified Ford Super Duty fitment and dimensional requirements for 2011-2026 trucks.

• Fits 2011-2026 Ford F-250 Super Duty, N/A
• Fits 2011-2026 Ford F-350 Super Duty, N/A