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Dayco PBO81461SC5 Engine Harmonic Balancer
| Brand | Dayco PBO81461SC5 |
|---|---|
| Bolt Hole Quantity | 9 |
| Counterweight Balance | Hub weighted |
| Crank Bore | 1.373 |
| Crank Bore | 34.87 |
| Crank Trigger/Exciter Plate | Yes |
| Hardware Included | No |
| Installation Instructions Included | No |
| Nose Outside Diameter | 1.934 |
| Nose Outside Diameter | 49.12 |
| Number of Integrated Pulleys | 2 |
| Outer Ring Material | Steel |
| Overall Outside Diameter | 185.00 |
| Overall Outside Diameter | 7.284 |
| Overall Width | 3.445 |
| Overall Width | 87.50 |
| Pulley 1 Number Of Grooves | 6 |
| Pulley 1 Outside Diameter | 176.200 |
| Pulley 1 Outside Diameter | 6.938 |
| Pulley 1 Type | Serpentine |
| Pulley 2 Number Of Grooves | 8 |
| Pulley 2 Outside Diameter | 185.000 |
| Pulley 2 Outside Diameter | 7.284 |
| Pulley 2 Type | Serpentine |
| Ring Width | 2.267 |
| Ring Width | 57.58 |
| Timing Marks | No |
| Woodruff Key Included | No |
| Product line | SC Performance 8 Rib 5% Overdrive |
| Fits | Buick, Chevrolet, Oldsmobile, and Pontiac · 50 vehicles |
SC Performance line. Overdrive setup for a more aggressive accessory drive.
Steel outer ring. Built with a durable ring for dependable harmonic control.
Hub weighted. Balanced design helps smooth crankshaft vibration.
Dayco SC Performance Harmonic Balancer
The Dayco SC Performance 8 Rib 5% Overdrive harmonic balancer is built for applications that need precise crankshaft damping and accessory drive control. This engine harmonic balancer fits select Pontiac Grand Prix, Buick Park Avenue, Chevrolet Impala, Chevrolet Monte Carlo, Buick Regal, Pontiac Bonneville, Buick LeSabre, Buick Riviera, and Oldsmobile LSS models with SC Performance 8 Rib 5% Overdrive fitment notes.
Part number PBO81461SC5 is part of Dayco’s SC Performance line, which focuses on performance-oriented accessory drive components for engines that use multi-rib serpentine belt systems. This unit combines a hub-weighted balance design with integrated pulleys to support a 5% overdrive setup.
- Hub weighted counterweight balance for crankshaft damping support
- Crank trigger/exciter plate included in the design
- Steel outer ring material
- Two integrated serpentine pulleys
- Pulley 1: 6-groove, 6.938 in. outside diameter
- Pulley 2: 8-groove, 7.284 in. outside diameter
- Overall outside diameter: 7.284 in. (185.00 mm)
- Overall width: 3.445 in. (87.50 mm)
- Crank bore: 1.373 in. (34.87 mm)
- Nose outside diameter: 1.934 in. (49.12 mm)
- Bolt hole quantity: 9
This harmonic balancer is used to restore or maintain crankshaft vibration control, accessory belt alignment, and proper pulley drive geometry on SC Performance 8 Rib 5% Overdrive applications. It is a direct-fit style component for vehicles such as the Pontiac Grand Prix, Buick Regal, and Chevrolet Impala when the listed fitment notes match the engine setup.
Common Issues It Can Address
- Crankshaft vibration from a worn or damaged balancer
- Belt tracking problems caused by pulley wear or imbalance
- Accessory drive speed mismatch in overdrive setups
- Noise from a deteriorated outer ring or hub assembly
- Timing signal concerns on engines using a crank trigger/exciter plate
Installation Notes
Verify crank bore, nose diameter, bolt pattern, and pulley configuration before installation. This part does not include hardware, installation instructions, timing marks, or a woodruff key. Confirm that the vehicle uses the SC Performance 8 Rib 5% Overdrive configuration listed in the fitment data before ordering PBO81461SC5.
Quality Assurance
Dayco manufactures performance-focused engine drive components with application-specific dimensions and materials. PBO81461SC5 is built with a steel outer ring and integrated pulley design to match the listed fitment requirements for select GM and Pontiac applications.
- Fits 1997-2007 Pontiac Grand Prix, N/A
- Fits 1996-2005 Buick Park Avenue, N/A
- Fits 2004-2005 Chevrolet Impala, N/A
- Fits 2004-2005 Chevrolet Monte Carlo, N/A
- Fits 1997-2004 Buick Regal, N/A
- Fits 1996-2003 Pontiac Bonneville, N/A
- Fits 2000 Buick LeSabre, N/A
- Fits 1996-1999 Buick Riviera, N/A
- Fits 1996-1999 Oldsmobile LSS, N/A
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2007 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2006 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2005 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2005 | Chevrolet | Impala | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2005 | Chevrolet | Monte Carlo | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2005 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2004 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2004 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2004 | Chevrolet | Impala | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2004 | Chevrolet | Monte Carlo | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2004 | Pontiac | Grand Prix | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2003 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2003 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2003 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2003 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2002 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2002 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2002 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2002 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2001 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2001 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2001 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2001 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 2000 | Buick | LeSabre | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2000 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2000 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2000 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 2000 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 1999 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1999 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1999 | Buick | Riviera | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1999 | Oldsmobile | LSS | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1999 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1999 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 1998 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1998 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1998 | Buick | Riviera | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1998 | Oldsmobile | LSS | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1998 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1998 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 1997 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1997 | Buick | Regal | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1997 | Buick | Riviera | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1997 | Oldsmobile | LSS | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1997 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1997 | Pontiac | Grand Prix | 3.8L | V6 | N/A | SC Performance 8 Rib 5% Overdrive |
| 1996 | Buick | Park Avenue | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1996 | Buick | Riviera | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1996 | Oldsmobile | LSS | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
| 1996 | Pontiac | Bonneville | — | — | N/A | SC Performance 8 Rib 5% Overdrive |
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