Dayco PB1186N Engine Harmonic Balancer

Dayco PB1186N Harmonic Balancer

The Dayco PB1186N is a premium OEM replacement harmonic balancer for select Dodge and Jeep applications. It is built as a neutral-balance engine damper with timing marks and a single 7-groove serpentine pulley for direct-fit service on compatible V8 applications.

Key Features

• Premium OEM replacement balancer from Dayco
• Neutral balance design with no counterweight
• Grey iron outer ring for durable engine damping
• Integrated 7-groove serpentine pulley
• Timing marks included for service alignment
• Crank bore: 1.530 in. (38.85 mm)
• Overall outside diameter: 7.205 in. (183.00 mm)
• Overall width: 4.776 in. (121.30 mm)

Product Details

Dayco PB1186N is an engine harmonic balancer engineered for Chrysler-family truck and SUV applications that require a neutral-balance damper with a serpentine accessory drive. The grey iron outer ring, 7.032-inch pulley diameter, and 7-groove pulley layout support stable belt operation while the timing marks provide a clear reference during engine service. This part number, PB1186N, cross-references ATP 102129 and Dorman 594-133 for the same application.

Compatible With 1998-2003 Dodge Dakota, N/A; 1998-2003 Dodge Durango, N/A; 1994-2003 Dodge Ram 1500, N/A; 1999-2003 Dodge Ram 1500 Van, N/A; 1999-2003 Dodge Ram 2500 Van, N/A; 1999-2003 Dodge Ram 3500 Van, N/A; 1994-2002 Dodge Ram 2500, N/A; 1994-2002 Dodge Ram 3500, N/A; 1998 Dodge B1500, N/A; 1995-1998 Dodge B2500, N/A; 1995-1998 Dodge B3500, N/A; 1998 Jeep Grand Cherokee, N/A; 1993-1994 Dodge B250, N/A; and 1993-1994 Dodge B350, N/A.

Common Issues This Part Addresses

• Worn or deteriorated harmonic balancer rubber isolation
• Visible wobble or runout at the crank pulley
• Timing mark wear that complicates ignition or service checks
• Belt tracking problems on the serpentine drive
• Noise or vibration from a failing crankshaft damper

Installation Notes and Tips

Verify crank bore, pulley groove count, and overall dimensions before installation. This balancer does not include hardware, installation instructions, a crank trigger/exciter plate, or a Woodruff key. Confirm timing mark orientation and inspect the crankshaft snout, pulley alignment, and accessory drive condition during replacement.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service in applications that call for OE-style fit and function. PB1186N is specified with neutral balance, timing marks, and the listed dimensional requirements for accurate application matching.