Dayco PB1688N Engine Harmonic Balancer

Overview of Dayco Premium OEM Replacement Balancer PB1688N

The Dayco Premium OEM Replacement Balancer PB1688N is engineered for reliable performance in select Buick, Cadillac, Oldsmobile, and Pontiac vehicles. Designed as an engine harmonic balancer, it helps maintain engine smoothness and reduces vibration in compatible models such as the Buick Lucerne and Cadillac DeVille.

• Neutral counterweight balance with no counterweight
• Crank bore diameter of 1.373 inches (34.85 mm)
• Single integrated serpentine pulley with 6 grooves
• Cast iron outer ring for durability
• Overall outside diameter of 7.304 inches (185.50 mm)
• Overall width of 1.678 inches (42.60 mm)
• No crank trigger/exciter plate included
• Hardware and installation instructions not included

Detailed Product Description

The Dayco PB1688N engine harmonic balancer is a precision component designed to reduce torsional vibration in the crankshaft of compatible engines. Featuring a neutral counterweight balance, this balancer does not include additional counterweights, making it suitable for specific engine configurations in Buick Aurora, Cadillac DTS, Oldsmobile Aurora, Pontiac Bonneville, and other models. The balancer includes one integrated serpentine pulley with six grooves, measuring 7.008 inches (178.00 mm) in diameter, which supports accessory belt routing.

Constructed with a cast iron outer ring, the balancer offers strength and wear resistance. The crank bore diameter is precisely 1.373 inches (34.85 mm), ensuring a proper fit on the crankshaft. The overall width of 1.678 inches (42.60 mm) and nose outside diameter of 2.063 inches (52.40 mm) are designed to meet OEM specifications for smooth engine operation.

About the Premium OEM Replacement Balancer Line

Dayco's Premium OEM Replacement Balancer line focuses on delivering components that meet original equipment manufacturer standards for fit, form, and function. The PB1688N is part of this line, providing a direct replacement solution for harmonic balancers in select GM vehicles. This product line emphasizes durability and precise engineering to maintain engine balance and accessory drive performance.

Common Applications and Problem Solving

• Reduces crankshaft vibration to prevent premature engine wear
• Replaces worn or damaged harmonic balancers causing belt misalignment
• Eliminates noise and vibration issues related to balancer failure
• Restores proper serpentine belt tension and routing
• Prevents engine performance issues linked to harmonic balancer degradation

Installation Notes and Tips

• Ensure crank bore diameter matches 1.373 inches (34.85 mm) for proper fit
• Use appropriate tools to press the balancer onto the crankshaft without damage
• Verify pulley alignment and belt routing after installation
• Note that hardware and installation instructions are not included; refer to vehicle service manual
• Check for any timing marks or keys on the crankshaft as this balancer does not include a Woodruff key or timing marks

Quality Assurance and Warranty

The Dayco Premium OEM Replacement Balancer PB1688N is manufactured to meet OEM quality standards, ensuring reliable performance and durability. While specific warranty details are not provided, Dayco products typically adhere to industry quality controls and are backed by the brand's commitment to automotive component standards.