ATP Parts 102122 Engine Harmonic Balancer

OE Replacement Harmonic Balancer

ATP Parts 102122 is an OE Replacement Balancer built to restore crankshaft vibration control in supported applications. It is a direct-fit engine harmonic balancer for classic Cadillac, Buick, Oldsmobile, and Pontiac vehicles, including Cadillac Brougham, Oldsmobile Cutlass Supreme, and Pontiac Firebird applications.

The ATP Parts OE Replacement Balancer line focuses on fit and function that match the original component, making it a practical choice when replacing a worn or failed harmonic balancer. Part number 102122 is listed for solid-type balancer applications with a 6.50-inch outer diameter.

• OE Replacement Balancer for engine vibration damping
• Solid-type harmonic balancer with 6.50 in. outer diameter
• Direct replacement for supported Cadillac, Buick, Oldsmobile, and Pontiac applications
• Helps maintain crankshaft and belt alignment when the original balancer is worn
• ATP Parts 102122 for classic GM V8 applications

How It Works

A harmonic balancer absorbs crankshaft vibration through an internal damping layer between the hub and outer pulley section. When that damping material deteriorates, the outer ring can shift and create belt misalignment, noise, and added stress on the crankshaft. ATP Parts 102122 restores the original balancer function for vehicles such as 1968-1978 Oldsmobile Delta 88, 1977-1979 Pontiac Firebird, and 1989-1990 Cadillac Brougham applications.

This part cross-references Monroe Shocks & Struts (e.g., 309144, 417142) for the same application.

Common Problems It Can Address

• Crankshaft vibration at idle or under load
• Belt tracking issues caused by a shifted outer ring
• Noise from a deteriorated balancer damping layer
• Visible wobble or separation in the harmonic balancer
• Stress on the crankshaft and front accessory drive components

Installation Notes

Verify the vehicle’s engine configuration, balancer style, and 6.50-inch outer diameter before installation. Inspect the crankshaft snout, pulley alignment, and belt condition during replacement. Because harmonic balancer failure can affect crankshaft integrity, replace the unit promptly if separation, wobble, or cracking is present.

Quality Assurance

ATP Parts OE Replacement Balancer 102122 is engineered to fit and function like the original part in listed applications, supporting normal engine operation after replacement.