Dorman 594-004 Engine Harmonic Balancer

Dorman 594-004 Harmonic Balancer for GM V6 Applications

The Dorman 594-004 harmonic balancer is a direct replacement engine component for select Chevrolet, Buick, Pontiac, and Oldsmobile vehicles. It uses a stress-resistant rubber bond to absorb engine vibration, while ductile steel construction adds tensile and impact strength for long-term durability.

Key Features

• Direct replacement harmonic balancer for compatible GM applications
• Stress-resistant rubber bond helps absorb crankshaft vibration
• Ductile steel construction for added strength and durability
• 6-groove pulley design for serpentine belt systems
• Degree markings included for timing reference
• Bolt and washer included; Woodruff key and instruction sheet in package contents
• Black finish with 182 mm outside diameter and 92.5 mm depth

Detailed Product Overview

Built for engine balance and vibration control, this Dorman 594-004 engine harmonic balancer is engineered for vehicles that rely on a serpentine drive belt layout. The 34.87 mm inside diameter, 6 pulley grooves, and single mounting hole support proper fitment on the listed GM platforms. This part cross-references ATP 102074 for the same application. It is a practical replacement for Chevrolet Impala, Chevrolet Monte Carlo, Buick Regal, Pontiac Grand Prix, and other listed models where crankshaft vibration damping and pulley alignment are critical.

Compatible With 2000-2005 Chevrolet Impala, 1998-2005 Chevrolet Monte Carlo, 1995-2004 Buick Regal, 1997-2003 Pontiac Grand Prix, and additional listed Buick, Chevrolet, Oldsmobile, and Pontiac applications. The Dorman 594-004 is also referenced by part number 594-004 for catalog and search use.

Common Issues This Part May Address

• Crankshaft vibration felt through the engine or accessory drive
• Worn or separated harmonic balancer rubber bond
• Timing reference visibility issues from a damaged or missing degree-marked balancer
• Pulley wobble or belt tracking concerns caused by a failing balancer
• Noise or imbalance from a deteriorated engine vibration damper

Installation Notes and Tips

Verify engine code, pulley groove count, inside diameter, and depth before installation. Confirm the Woodruff key seats correctly and inspect the crankshaft snout, pulley alignment, and belt condition during replacement. Use the included instruction sheet and follow the vehicle service procedure for torque and timing reference alignment. The Dorman 594-004 should be installed on the exact applications listed in the fitment data.

Quality Assurance

Dorman manufactures this harmonic balancer as a direct replacement component with materials selected for strength and vibration control. The ductile steel body and bonded rubber construction are intended to support reliable operation in the specified Chevrolet, Buick, Pontiac, and Oldsmobile applications.