ATP Parts 102063 Engine Harmonic Balancer

OE Replacement Harmonic Balancer for GM and Isuzu Applications

ATP Parts 102063 is an OE Replacement Balancer built to restore crankshaft vibration control and belt alignment on select Chevrolet, GMC, Pontiac, Buick, Oldsmobile, Isuzu, and related applications. This harmonic balancer is a direct-fit engine component for vehicles such as the Chevrolet S10, Camaro, and Pontiac Firebird, where stable pulley operation is critical to normal engine performance.

Key Features

• OE Replacement Balancer from ATP Parts OE Replacement Balancer line
• Standard replacement grade for direct-fit service
• 4-groove pulley design for flat drive belt systems
• 4 mounting holes
• Outside diameter: 6.375 in. (162.7 mm)
• Inside diameter: 1.25 in. (32 mm)
• Depth: 2.3125 in. (58 mm)
• Built to absorb crankshaft vibration and maintain pulley alignment

Product Details

The harmonic balancer, also called a crankshaft damper, uses an internal damping layer to reduce engine vibration while the outer pulley surface drives the belt system. When the damping material deteriorates, the outer ring can shift and create belt misalignment, noise, or drivability concerns. ATP Parts 102063 is engineered as a standard replacement for the original balancer, with fit and function intended to restore normal engine operation on supported vehicles. This part cross-references Pioneer Automotive Industries DA-1890 for the same application.

Common Issues This Part Can Address

• Crankshaft vibration at idle or under load
• Belt tracking problems caused by pulley shift
• Accessory drive noise from a worn balancer
• Visible deterioration or separation in the balancer assembly
• Loss of proper harmonic damping in the engine

Installation Notes and Tips

Verify crankshaft diameter, pulley groove count, and mounting-hole pattern before installation. Confirm the balancer matches the vehicle’s solid-style OE replacement application and the listed outer diameter of 6.41 in. for the supported fitments. Inspect the belt system, crankshaft snout, and related pulleys for wear before installing the new unit. Professional installation is recommended to ensure proper seating and alignment.

Quality Assurance

ATP Parts 102063 is part of ATP’s OE Replacement Balancer line, which focuses on direct-fit service parts that match original form and function for supported applications. It is listed for a wide range of 1982-1994 vehicles, including Chevrolet S10, Camaro, and Pontiac Firebird applications, with fitment coverage across 62 vehicles.

Compatible Vehicles

• Fits 1991-1994 Isuzu Pickup, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1988-1993 Chevrolet S10, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1991-1993 GMC Sonoma, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1988-1992 Chevrolet Camaro, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1991-1992 Isuzu Rodeo, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1988-1992 Pontiac Firebird, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1989-1991 Isuzu Trooper, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1988-1990 GMC S15, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1988-1989 Chevrolet S10 Blazer, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1988-1989 GMC S15 Jimmy, N/A; Part Type: Solid; Outer Diameter: 6.41 in; OE Replacement Balancer
• Fits 1986 Buick Century, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982-1986 Chevrolet Celebrity, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1986 Oldsmobile Cutlass Ciera, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982 Oldsmobile Cutlass Ciera, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982-1986 Pontiac 6000, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982-1985 Buick Skylark, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1984-1985 Chevrolet Citation II, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982-1984 Oldsmobile Omega, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982-1984 Pontiac Phoenix, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer
• Fits 1982-1983 Chevrolet Citation, N/A; Part Type: Solid; Outer Diameter: 6.41 in; Stamped 4955; OE Replacement Balancer