Dayco PBO81117SC10 Engine Harmonic Balancer

Dayco SC Performance Harmonic Balancer

The Dayco SC Performance 8 Rib 10% Overdrive harmonic balancer is built for performance applications that need precise crankshaft damping and accessory drive control. This engine harmonic balancer features a neutral balance design, steel outer ring, timing marks, and dual integrated serpentine pulleys for a clean, direct fit on supported Chevrolet, Pontiac, and Cadillac applications.

Key Features

• Dayco SC Performance 8 Rib 10% Overdrive line for performance-oriented accessory drive setups
• Neutral balance design with no counterweight
• Steel outer ring for durable construction
• Two integrated serpentine pulleys: 4-groove and 8-groove
• Timing marks included for setup and service reference
• 9 bolt holes, 1.481 crank bore, and 2.126 nose outside diameter
• Overall outside diameter: 8.229 in. with 3.101 in. overall width
• Installation instructions included

Product Details

Part number PBO81117SC10 is part of Dayco’s SC Performance 8 Rib 10% Overdrive line, a product line focused on performance accessory drive geometry for engines that require a specific pulley ratio and belt layout. This harmonic balancer uses a steel outer ring and a neutral balance configuration, and it includes timing marks for easier engine setup. The dual pulley design combines a 4-groove serpentine pulley and an 8-groove serpentine pulley, making it a fitment-specific solution for vehicles such as the Chevrolet Corvette, Chevrolet Caprice, Chevrolet SS, Pontiac G8, and Cadillac CTS within the listed model years. If you are searching for a Dayco PBO81117SC10 harmonic balancer for a Chevrolet Corvette or Cadillac CTS, this part is built to match the specified application details.

This part cross-references none listed for the same application.

What It Is Used For

• Replacing a worn or damaged engine harmonic balancer
• Restoring crankshaft vibration damping performance
• Correcting accessory drive alignment on SC Performance applications
• Addressing timing mark visibility during engine service
• Supporting proper belt routing with integrated serpentine pulleys

Installation Notes and Tips

Verify crank bore, bolt hole quantity, nose diameter, and pulley configuration before installation. Confirm the engine is a neutral-balance application and compare the timing marks to the original part. Use the included installation instructions and follow the vehicle service manual for torque and alignment procedures. For fitment-based searches, this Dayco PBO81117SC10 harmonic balancer is listed for 1997-2013 Chevrolet Corvette, 2004-2007 Cadillac CTS, 2008-2009 Pontiac G8, 2011-2017 Chevrolet Caprice, and 2014-2017 Chevrolet SS.

Quality Assurance

Dayco manufactures performance drivetrain and accessory drive components with application-specific dimensions and service-focused features. This harmonic balancer includes timing marks and installation instructions to support accurate setup on the listed vehicles.