Dayco PB1587N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1587N

The Dayco PB1587N is a premium OEM replacement harmonic balancer built for Ford, Mazda, and Mercury applications that use a serpentine drive. It features a neutral balance design, a cast iron outer ring, and an integrated 6-groove pulley for direct-fit engine service.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Part number PB1587N
• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine operation
• Integrated 1-pulley serpentine design with 6 grooves
• Crank trigger/exciter plate included in the balancer design
• Crank bore: 1.044 in. (26.51 mm)
• Overall outside diameter: 5.434 in. (138.00 mm)
• Overall width: 1.532 in. (38.90 mm)

Product Details

Dayco Premium OEM Replacement Balancer PB1587N is engineered as a direct replacement harmonic balancer for engines that require a neutral-balance configuration and a serpentine pulley setup. The cast iron outer ring and integrated pulley help maintain proper accessory drive alignment, while the crank trigger/exciter plate support makes it suitable for applications that rely on crank signal indexing. This part cross-references Dorman 594-318 and 594-511 for the same application.

Compatible With 2010-2013 Ford Transit Connect, 2003-2011 Ford Focus, 2001-2011 Ford Ranger, 2001-2010 Mazda B2300, 2008 Mazda Tribute, 2005-2006 Mazda Tribute, 2005-2008 Mercury Mariner, and 2005-2007 Ford Escape. Search terms such as Ford Focus harmonic balancer PB1587N, Ford Ranger engine harmonic balancer, and Mazda Tribute OEM replacement balancer apply to this part.

Common Issues This Part May Address

• Crankshaft vibration caused by a worn or damaged balancer
• Accessory belt tracking problems from a failing integrated pulley
• Noise from a deteriorated harmonic balancer assembly
• Crank signal concerns on applications using an exciter plate
• Service replacement needs for Ford, Mazda, and Mercury engines

Installation Notes and Tips

Verify crank bore, pulley groove count, and overall dimensions before installation. This balancer does not include hardware, installation instructions, timing marks, or a Woodruff key. Proper alignment during installation is important for serpentine belt operation and crankshaft vibration control.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for OE-style fit and function in engine service applications. The PB1587N is specified with neutral balance, a cast iron outer ring, and integrated crank trigger support for the listed Ford, Mazda, and Mercury vehicles.