Dayco PB1681N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1681N

The Dayco PB1681N is a premium OEM replacement engine harmonic balancer built for Chrysler, Dodge, and Ram applications that require a neutral-balance design. It features a cast iron outer ring, a single integrated serpentine pulley with 7 grooves, and a 3-bolt hole pattern for direct replacement use on supported vehicles.

Dayco’s Premium OEM Replacement Balancer line focuses on OE-style fit and function for engine vibration control and accessory drive alignment. The PB1681N follows that approach with application-specific dimensions and a neutral counterweight balance for the listed Chrysler Aspen, Dodge Durango, and Dodge Ram truck platforms.

Key Features

• Engine harmonic balancer for OE-style replacement service
• Neutral balance design with no counterweight
• Cast iron outer ring for durable rotating assembly support
• Single integrated serpentine pulley with 7 grooves
• 3-bolt hole quantity for supported applications
• Crank bore: 1.475 in. (37.45 mm)
• Nose outside diameter: 1.982 in. (50.33 mm)
• Overall outside diameter: 7.225 in. (183.50 mm)
• Overall width: 4.634 in. (117.70 mm)
• Ring width: 1.260 in. (32.00 mm)

Detailed Description

The Dayco PB1681N harmonic balancer is used to help control crankshaft vibration while maintaining proper serpentine belt drive geometry. Its neutral balance configuration, cast iron outer ring, and integrated pulley layout make it a direct-fit replacement for specific 2003-2008 Dodge Ram 1500, Ram 2500, and Ram 3500 models, plus 2004-2008 Dodge Durango and 2007-2008 Chrysler Aspen applications. If you are sourcing a Dayco PB1681N for a Chrysler Aspen or Dodge Ram engine repair, verify the crankshaft and pulley dimensions against the original part before installation.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Crankshaft vibration at idle or under load
• Serpentine belt tracking or alignment concerns
• Noise from a worn or deteriorated balancer assembly
• Visible cracking, separation, or wobble at the harmonic balancer
• Replacement needs during engine front-end service on Dodge Ram, Durango, or Chrysler Aspen vehicles

Installation Notes and Tips

Confirm the crank bore, nose diameter, pulley groove count, and bolt pattern before installation. This balancer does not include hardware, timing marks, a crank trigger/exciter plate, or a Woodruff key. Because installation instructions are not included, follow the vehicle service manual and use the correct puller and installer tools for the engine platform.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built as an OE-style service part for supported Chrysler, Dodge, and Ram applications. The PB1681N is specified with application-matched dimensions and materials to support proper fitment on the listed vehicles.

• Fits 2007-2008 Chrysler Aspen, N/A
• Fits 2004-2008 Dodge Durango, N/A
• Fits 2003-2008 Dodge Ram 1500, N/A
• Fits 2003-2008 Dodge Ram 2500, N/A
• Fits 2003-2008 Dodge Ram 3500, N/A