Dayco PB1138N Engine Harmonic Balancer

Overview of Dayco Premium OEM Replacement Balancer PB1138N

The Dayco Premium OEM Replacement Balancer PB1138N is engineered for Nissan Sentra models requiring precise engine harmonic balancing. Designed to meet OEM specifications, this balancer ensures smooth engine operation and reliable performance.

• Compatible with Nissan Sentra vehicles
• Neutral counterweight balance with no counterweight
• Crank bore diameter of 1.062 inches (26.96 mm)
• Two integrated serpentine pulleys with 4 and 6 grooves respectively
• Cast iron outer ring for durability
• Includes timing marks for accurate installation
• Overall outside diameter of 6.418 inches (163 mm)
• Overall width of 1.819 inches (46.20 mm)
• No hardware or installation instructions included

About the Premium OEM Replacement Balancer Product Line

The Dayco Premium OEM Replacement Balancer line is designed to provide direct-fit replacements that match original equipment specifications. This product line focuses on delivering components that maintain engine balance and reduce vibration without requiring modifications. The PB1138N model exemplifies this approach by offering a neutral counterweight design and integrated serpentine pulleys that align with factory standards for Nissan Sentra engines.

Detailed Product Description

The PB1138N engine harmonic balancer features a cast iron outer ring that contributes to its structural integrity and longevity. It has a crank bore size of 1.062 inches (26.96 mm), ensuring a precise fit on the crankshaft. The balancer includes two serpentine pulleys: one with 4 grooves and a diameter of 5.079 inches (129 mm), and another with 6 grooves measuring 6.142 inches (156 mm). These pulleys facilitate proper belt routing for engine accessories. The balancer’s overall dimensions—6.418 inches in diameter and 1.819 inches in width—are designed to match OEM specifications for the Nissan Sentra. Timing marks are present to assist with accurate installation alignment. This part does not include hardware or installation instructions, so professional installation is recommended.

Common Applications and Issues Addressed

• Reduces engine vibration caused by harmonic imbalances
• Replaces worn or damaged harmonic balancers in Nissan Sentra engines
• Restores proper pulley alignment for serpentine belt systems
• Prevents premature wear on crankshaft and accessory components
• Helps maintain engine timing accuracy with integrated timing marks

Installation Notes and Tips

• Ensure the crank bore diameter matches the engine crankshaft (1.062 inches)
• Use proper tools to avoid damage to the cast iron outer ring during installation
• Align timing marks carefully to maintain engine timing accuracy
• Verify pulley groove counts and sizes to match belt routing requirements
• Professional installation is recommended due to the absence of included hardware and instructions

Quality Assurance and Warranty

Dayco’s Premium OEM Replacement Balancer PB1138N is manufactured to meet stringent OEM standards for fit and function. The cast iron construction and precise machining contribute to reliable performance and durability. While specific warranty details are not provided, Dayco products typically come with manufacturer-backed quality assurance to support long-term use in Nissan Sentra vehicles.