Dayco PB1155N Engine Harmonic Balancer

Dayco PB1155N Harmonic Balancer

The Dayco PB1155N is a premium OEM replacement harmonic balancer for select Ford, Mercury, and Mazda applications. It is built with a neutral balance design, a cast iron outer ring, and integrated serpentine pulley construction for accurate crankshaft vibration control and dependable belt drive operation.

Key Features

• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine service
• Integrated 6-groove serpentine pulley
• Timing marks included for service alignment
• Crank bore: 1.104 in. / 28.04 mm
• Overall outside diameter: 5.158 in. / 131.00 mm
• Overall width: 1.398 in. / 35.50 mm
• Brand line: Premium OEM Replacement Balancer

Detailed Description

Dayco PB1155N is a direct-fit engine harmonic balancer for vehicles that require a neutral-balance crankshaft damper with a single integrated serpentine pulley. The cast iron outer ring and 6-groove pulley layout support stable accessory belt operation, while the included timing marks assist with engine service and crankshaft positioning. This part number, PB1155N, is listed for 1995-2000 Ford Contour, 1995-2000 Mercury Mystique, 1998-2003 Ford Escort, 1999-2002 Mercury Cougar, 2001-2004 Ford Escape, 2001-2004 Ford Focus, and 2001-2004 Mazda Tribute.

This part cross-references Dorman 594-221 for the same application.

Common Uses

• Crankshaft vibration control on a worn or damaged harmonic balancer
• Restoring proper serpentine belt tracking and pulley alignment
• Replacing a balancer with damaged timing marks
• Addressing belt noise caused by pulley wear or imbalance
• Repairing front-of-engine service issues on Ford, Mercury, and Mazda vehicles

Installation Notes

Verify crank bore, pulley groove count, and timing mark alignment before installation. This balancer does not include hardware, installation instructions, or a Woodruff key. Confirm engine balance type and accessory drive configuration against the original part before service. Fits 1995-2000 Ford Contour, 1995-2000 Mercury Mystique, 1998-2003 Ford Escort, 1999-2002 Mercury Cougar, 2001-2004 Ford Escape, 2001-2004 Ford Focus, and 2001-2004 Mazda Tribute.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for OE-style fit and service replacement on the listed applications. Part number PB1155N is specified for confirmed vehicle fitment across Ford, Mercury, and Mazda models in the years shown.