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Dayco PB1050ST Engine Harmonic Balancer
Overview of Dayco Street Performance Balancer PB1050ST
The Dayco Street Performance Balancer PB1050ST is engineered for Chevrolet and GMC vehicles requiring precise engine harmonic balancing. Designed to reduce crankshaft vibration, this balancer supports smooth engine operation in models like the Chevrolet C10, Impala, and GMC K1500.
- Ring weighted counterbalance for improved vibration control
- Cast iron outer ring for durability and wear resistance
- 3 bolt hole configuration for secure mounting
- Overall outside diameter of 7.953 inches (202.00 mm)
- Crank bore diameter of 1.245 inches (31.60 mm)
- Includes timing marks for accurate engine timing
- No integrated pulleys or crank trigger/exciter plate
Detailed Product Features and Specifications
The PB1050ST harmonic balancer features a ring weighted counterbalance design that helps minimize crankshaft vibrations, enhancing engine longevity and performance. Its cast iron outer ring provides robust construction to withstand the stresses of engine operation. The balancer has a 3 bolt hole pattern, ensuring compatibility with a range of Chevrolet and GMC engines. The crank bore measures 1.245 inches (31.60 mm), fitting precisely on the crankshaft. The overall width is 2.343 inches (59.50 mm), and the nose outside diameter is 1.762 inches (44.75 mm). This balancer includes timing marks to assist with proper engine timing during installation and maintenance.
About the Street Performance Balancer Product Line
The Dayco Street Performance Balancer line is designed to provide reliable harmonic balancing solutions for street-driven vehicles. This product line focuses on delivering consistent vibration dampening and durability for engines used in daily driving and light performance applications. The PB1050ST is part of this line, offering a balance of performance and longevity for Chevrolet and GMC trucks and cars.
Compatible Vehicles and Applications
This harmonic balancer is compatible with a variety of Chevrolet and GMC models, including but not limited to:
- Chevrolet Bel Air, C10, C20, C30, Caprice, El Camino, Impala, Malibu, Monte Carlo
- GMC C1500, C2500, C3500, G10, G20, G30, Jimmy, K5 Blazer, K10, K20, K30, K1500, K2500, K3500
- Suburban variants of C20, C2500, K10, K20, K1500, K2500
- P10 and P30 models
Common Issues Addressed by the PB1050ST Harmonic Balancer
- Reduces crankshaft vibration that can cause premature engine wear
- Helps maintain accurate engine timing with integrated timing marks
- Prevents harmonic resonance that may lead to crankshaft damage
- Supports smooth engine operation in Chevrolet and GMC trucks and cars
- Improves overall engine balance for better performance and longevity
Installation Notes and Tips
The Dayco PB1050ST harmonic balancer requires precise installation to ensure proper function. Note that installation hardware and woodruff key are not included and must be sourced separately. Use the timing marks on the balancer to align the engine timing accurately. Verify the 3 bolt hole pattern matches your engine’s crankshaft flange. Proper torque specifications should be followed to secure the balancer without causing damage.
Quality Assurance and Warranty
Dayco manufactures the PB1050ST harmonic balancer to meet industry standards for durability and performance. The cast iron outer ring and ring weighted design contribute to its reliability under normal operating conditions. Warranty details should be confirmed with the manufacturer or distributor, as they may vary by region and application.
| Brand | Dayco |
| Part Number | PB1050ST |
| Position | Street Performance Balancer |
| Bolt Hole Quantity | 3 |
| Counterweight Balance | Ring weighted |
| Crank Bore | 1.245 |
| Crank Bore | 31.60 |
| Crank Trigger/Exciter Plate | No |
| Hardware Included | No |
| Installation Instructions Included | No |
| Nose Outside Diameter | 1.762 |
| Nose Outside Diameter | 44.75 |
| Number of Integrated Pulleys | 0 |
| Outer Ring Material | Cast iron |
| Overall Outside Diameter | 202.00 |
| Overall Outside Diameter | 7.953 |
| Overall Width | 2.343 |
| Overall Width | 59.50 |
| Ring Width | 1.523 |
| Ring Width | 38.68 |
| Timing Marks | Yes |
| Woodruff Key Included | No |
This part fits 132 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1980 | Chevrolet | C10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | Chevrolet | C20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1980 | Chevrolet | C20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | Chevrolet | G20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | Chevrolet | G30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | Chevrolet | K10 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1980 | Chevrolet | K20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1980 | Chevrolet | K20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1980 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | Chevrolet | K30 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1980 | GMC | C1500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | C2500 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | G2500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | G3500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | K1500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | K1500 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | K2500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | K2500 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1980 | GMC | K3500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | C10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | C20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | C20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | G20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | G30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | K10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | K10 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | K20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | K30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | Chevrolet | K5 Blazer | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | C1500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | C2500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | C3500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | G1500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | G2500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | G3500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | Jimmy | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | K1500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | K1500 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | K2500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | K2500 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1979 | GMC | K3500 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | C10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | C20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | C20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | C30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | G20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1978 | Chevrolet | G30 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1978 | Chevrolet | K10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | K10 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | K20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | K30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1978 | Chevrolet | K5 Blazer | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1978 | GMC | G25 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1978 | GMC | G35 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1978 | GMC | Jimmy | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1977 | Chevrolet | C10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | C20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | C20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | C30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | G20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1977 | Chevrolet | G30 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1977 | Chevrolet | K10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | K10 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | K20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | K30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | Chevrolet | K5 Blazer | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1977 | Chevrolet | P10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1977 | GMC | G25 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1977 | GMC | G35 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1977 | GMC | Jimmy | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | C10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | C20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | C20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | C30 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | Caprice | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | El Camino | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | G10 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | G20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | G30 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | Impala | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | K10 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | K10 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | K20 | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1976 | Chevrolet | K5 Blazer | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | Malibu | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | Chevrolet | P30 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | GMC | G15 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | GMC | G25 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | GMC | G35 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1976 | GMC | Jimmy | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | Chevrolet | Bel Air | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | Chevrolet | Caprice | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | Chevrolet | El Camino | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | Chevrolet | G20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | G30 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | Impala | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | Chevrolet | K10 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | K10 Suburban | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | K20 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | K20 Suburban | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | K5 Blazer | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | Chevrolet | Malibu | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1975 | GMC | G25 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | GMC | G35 | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1975 | GMC | Jimmy | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1974 | Chevrolet | Bel Air | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1974 | Chevrolet | Caprice | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1974 | Chevrolet | El Camino | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1974 | Chevrolet | Impala | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1974 | Chevrolet | Malibu | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1974 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1973 | Chevrolet | Bel Air | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1973 | Chevrolet | Caprice | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1973 | Chevrolet | Impala | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1973 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1972 | Chevrolet | Bel Air | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1972 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1971 | Chevrolet | Bel Air | 6.6L | V8 | N/A | Street Performance Balancer | |
| 1971 | Chevrolet | Caprice | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1971 | Chevrolet | Impala | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1971 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1970 | Chevrolet | Caprice | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1970 | Chevrolet | El Camino | Custom | 6.6L | V8 | N/A | Street Performance Balancer |
| 1970 | Chevrolet | Impala | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer | |
| 1970 | Chevrolet | Monte Carlo | 6.6L | V8 | N/A | 8 In. Diameter, w/Counterweighted Ring; Street Performance Balancer |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.