Dayco PB1239N Engine Harmonic Balancer

Dayco PB1239N Harmonic Balancer Overview

The Dayco PB1239N is a premium OEM replacement harmonic balancer for select 1993-1995 Ford Probe, Mazda 626, and Mazda MX-6 applications. Built with a cast iron outer ring and neutral balance, it supports smooth crankshaft operation while maintaining timing mark visibility for service work.

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine vibration control components that match original-style dimensions and pulley layout for service replacement.

Key Features

• Part number PB1239N for direct identification
• Neutral balance design with no counterweight
• Cast iron outer ring for durable engine service
• Two integrated serpentine pulleys
• Timing marks included for setup and inspection
• Crank bore measures 1.182 in. / 30.01 mm
• Overall outside diameter measures 5.756 in. / 146.20 mm
• Overall width measures 1.693 in. / 43.00 mm

Detailed Description

The Dayco PB1239N harmonic balancer is engineered as a premium OEM replacement for engines that require stable crankshaft damping and accurate accessory drive alignment. Its neutral balance configuration, cast iron outer ring, and dual serpentine pulley arrangement support original-style engine operation in 1993-1995 Ford Probe, 1993-1995 Mazda 626, and 1993-1995 Mazda MX-6 models. The PB1239N also includes timing marks, which helps with ignition and engine service procedures where crank position reference is needed. This part cross-references ATP 102130 and Dorman 594-134 for the same application.

What This Part Helps Address

• Crankshaft vibration from a worn or damaged harmonic balancer
• Accessory belt alignment issues at the front of the engine
• Timing mark visibility problems during service
• Noise or wobble caused by a deteriorated balancer assembly
• Drive belt tracking concerns related to pulley wear

Installation Notes and Tips

Verify crank bore, overall diameter, width, and pulley configuration before installation. The PB1239N does not include hardware, installation instructions, a crank trigger/exciter plate, or a Woodruff key. Confirm timing mark orientation and pulley alignment during installation, and follow the vehicle service manual for torque and assembly procedures.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service on the listed Ford Probe, Mazda 626, and Mazda MX-6 applications. Confirm fitment by year, engine configuration, and pulley layout before ordering.