Dayco PB1670N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1670N

The Dayco PB1670N is a premium OEM replacement harmonic balancer built for engine applications that require neutral counterweight balance and a serpentine pulley setup. It is engineered for select Mazda 3, Mazda CX-7, and Mazda 6 models, with fitment covering 2006-2013 applications depending on vehicle.

Key Features

• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine service
• Integrated crank trigger/exciter plate included
• Single integrated pulley with 6-groove serpentine configuration
• Overall outside diameter: 6.103 in. (155 mm)
• Overall width: 1.536 in. (39 mm)
• Crank bore: 1.044 in. (26.51 mm)
• Nose outside diameter: 1.457 in. (37 mm)
• Ring width: 1.016 in. (25.8 mm)
• Dayco PB1670N for OE-style engine replacement service

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine components that match original equipment dimensions and functional requirements. The PB1670N harmonic balancer is built with a cast iron outer ring, neutral counterweight balance, and a 6-groove serpentine pulley to support crankshaft damping and accessory drive operation in the correct Mazda engine applications. This part number, PB1670N, is listed for 2007-2013 Mazda 3, 2007-2012 Mazda CX-7, and 2006-2007 Mazda 6.

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

What It Helps Address

• Crankshaft vibration from a worn or failing harmonic balancer
• Serpentine belt drive issues caused by pulley wear or imbalance
• Engine accessory drive noise related to balancer deterioration
• Timing signal concerns where the crank trigger/exciter plate is required
• Fitment problems when replacing an OE-style balancer on Mazda 3, Mazda CX-7, or Mazda 6

Installation Notes

Verify crank bore, nose diameter, pulley groove count, and overall dimensions before installation. The PB1670N does not include hardware, installation instructions, timing marks, or a woodruff key, so reuse or source the correct related components as required by the vehicle service procedure. Confirm the engine configuration and accessory drive layout on the specific Mazda 3, Mazda CX-7, or Mazda 6 application before assembly.

Quality Assurance

As part of Dayco’s Premium OEM Replacement Balancer line, PB1670N is built to OE-style dimensional and functional standards for the listed Mazda applications. It is intended for direct replacement service where the original harmonic balancer specification calls for a neutral-balance, serpentine-drive design.