Dayco PB1686N Engine Harmonic Balancer

Overview of Dayco Premium OEM Replacement Balancer PB1686N

The Dayco Premium OEM Replacement Balancer PB1686N is engineered for precise engine harmonic balancing in select Infiniti and Nissan vehicles. Designed to maintain engine stability, this balancer supports smooth operation and reduces vibration in compatible models such as the Nissan 350Z and Infiniti G37.

• Neutral counterweight balance with no counterweight
• Crank bore diameter of 1.260 inches (31.98 mm)
• Single integrated serpentine pulley with 7 grooves
• Cast iron outer ring for durability
• Overall outside diameter of 5.945 inches (151 mm)
• Includes timing marks for accurate installation
• No crank trigger/exciter plate included
• Hardware and installation instructions not included

Detailed Product Description

The Dayco PB1686N engine harmonic balancer is a critical component designed to reduce torsional vibration in the crankshaft of compatible Infiniti and Nissan engines. Featuring a neutral counterweight balance, this balancer does not add additional counterweights, ensuring precise engine timing and smooth operation. The balancer includes a single serpentine pulley with seven grooves, measuring 5.749 inches (146 mm) in diameter, constructed with a durable cast iron outer ring to withstand engine stresses. Its overall width is 3.130 inches (79.50 mm), and the nose outside diameter measures 1.890 inches (48 mm). The inclusion of timing marks facilitates proper alignment during installation, although hardware and installation instructions are not provided with this part.

Compatible Vehicles and Applications

This Dayco Premium OEM Replacement Balancer PB1686N is compatible with a range of Infiniti and Nissan models, including:

• Infiniti 350Z, 370Z, EX35, EX37, FX35, FX37, G35, G37, M35, M35h, M37, Q40, Q50, Q60, Q70, Q70L, QX50, QX70
• Nissan 350Z and 370Z

It is designed to replace the original equipment harmonic balancer, ensuring proper engine function and longevity.

Common Issues Addressed by This Balancer

• Excessive crankshaft vibration causing engine noise
• Premature wear of engine components due to imbalance
• Reduced engine performance and efficiency
• Potential damage to timing components
• Engine rough idling or misfires related to harmonic imbalance

Installation Notes and Tips

• Ensure the crank bore diameter matches the engine specifications (1.260 inches / 31.98 mm)
• Use proper tools to align timing marks during installation
• Verify pulley groove count and type (7-groove serpentine) for belt compatibility
• Hardware and installation instructions are not included; refer to vehicle service manual
• Inspect the crankshaft and surrounding components for wear before installation

Quality Assurance and Warranty

The Dayco Premium OEM Replacement Balancer line is designed to meet or exceed OEM specifications for fit, form, and function. Manufactured with high-quality materials such as cast iron for the outer ring, this balancer provides reliable performance under normal operating conditions. While specific warranty details are not provided, Dayco products typically come with manufacturer-backed quality assurance to support durability and proper function in compatible Infiniti and Nissan vehicles.