Dayco PB1387N Engine Harmonic Balancer

Overview of Dayco Premium OEM Replacement Balancer PB1387N

The Dayco Premium OEM Replacement Balancer PB1387N is engineered for reliable performance in select Ford and Mazda vehicles. Designed as an engine harmonic balancer, this component helps maintain engine stability and reduce vibration for smoother operation.

• Compatible with Ford Escape and Mazda 3, Mazda 5 models
• Overall outside diameter: 138 mm (5.434 inches)
• Includes two integrated serpentine pulleys with 5 and 6 grooves respectively
• Cast iron outer ring for durability
• Neutral counterweight balance with crank trigger/exciter plate included
• Crank bore diameter: 26.51 mm (1.044 inches)
• No hardware or installation instructions included

Detailed Product Features and Specifications

The Dayco PB1387N engine harmonic balancer features a cast iron outer ring that provides strength and wear resistance. It has a neutral counterweight balance, meaning it does not add additional counterweight to the crankshaft, which is important for maintaining engine balance in compatible vehicles. The balancer includes a crank trigger/exciter plate, essential for engine timing and sensor functions.

This balancer integrates two serpentine pulleys, one with 5 grooves and the other with 6 grooves, both measuring 133 mm (5.237 inches) in outside diameter. The overall width of the balancer is 59.50 mm (2.343 inches), and the ring width is 45.75 mm (1.802 inches). The crank bore diameter is precisely 26.51 mm (1.044 inches), ensuring a proper fit on the crankshaft.

About the Premium OEM Replacement Balancer Product Line

The Dayco Premium OEM Replacement Balancer line is designed to meet original equipment manufacturer specifications for fit, form, and function. This product line focuses on delivering reliable replacement parts that maintain engine balance and performance without modification. The PB1387N is part of this line, providing a direct replacement solution for specific Ford and Mazda models.

Common Applications and Problem Solving

• Reduces engine vibration caused by worn or damaged harmonic balancers
• Restores proper crankshaft balance for smoother engine operation
• Supports crank trigger/exciter plate functions for accurate engine timing
• Prevents premature wear on belts and pulleys by maintaining proper pulley alignment
• Eliminates noise and potential engine damage from faulty balancer components

Installation Notes and Tips

Installation of the Dayco PB1387N requires proper alignment on the crankshaft with the correct crank bore diameter of 26.51 mm. Note that this part does not include hardware or installation instructions, so it is recommended to consult the vehicle’s service manual or a professional mechanic for torque specifications and installation procedures. Ensure the crank trigger/exciter plate is correctly positioned to maintain engine timing accuracy.

Quality Assurance and Warranty

Dayco’s Premium OEM Replacement Balancer products are manufactured to meet stringent quality standards consistent with OEM requirements. While specific warranty details for part number PB1387N are not provided here, Dayco typically offers limited warranties covering defects in materials and workmanship. For warranty information, refer to Dayco’s official documentation or contact authorized distributors.