Dorman 594-566 Engine Harmonic Balancer

Overview of Dorman Engine Harmonic Balancer 594-566

The Dorman 594-566 engine harmonic balancer is designed specifically for Chevrolet Express 3500 and GMC Savana 3500 models. This component plays a critical role in reducing engine vibration and ensuring smooth operation of your vehicle's engine.

• Inside diameter: 40.6 mm
• Outside diameter: 198 mm
• Six pulley grooves for serpentine drive belts
• Single mounting hole with 59.2 mm diameter
• Depth of 147.5 mm
• Black finish for corrosion resistance
• No bolt, washer, or center bolt included
• No keyway or degree markings

Detailed Product Description

The Dorman 594-566 engine harmonic balancer is engineered to meet the specifications required for Chevrolet Express 3500 and GMC Savana 3500 vehicles. Featuring a 40.6 mm inside diameter and a 198 mm outside diameter, this balancer accommodates serpentine drive belts with six pulley grooves. Its single mounting hole, measuring 59.2 mm in diameter, ensures secure attachment to the engine block. The balancer’s depth of 147.5 mm supports proper alignment and fitment within the engine assembly. Finished in black, it offers resistance to corrosion and wear over time. This regular grade harmonic balancer does not include mounting hardware such as bolts or washers, so these must be sourced separately during installation.

Function and Common Applications

This engine harmonic balancer is essential for:

• Reducing torsional vibration in the crankshaft
• Protecting engine components from premature wear
• Maintaining proper timing and belt alignment
• Minimizing noise and harshness during engine operation
• Ensuring longevity of serpentine belt-driven accessories

Installation Notes and Tips

When installing the Dorman 594-566 harmonic balancer on Chevrolet Express 3500 or GMC Savana 3500 models, ensure the following:

• Verify the balancer’s inside diameter matches the crankshaft snout
• Use appropriate tools to press the balancer onto the crankshaft without damage
• Confirm the serpentine belt grooves align correctly with the drive belt
• Secure the balancer using the correct mounting bolt and torque specifications (not included)
• Inspect the crankshaft and surrounding components for wear before installation

Quality Assurance and Warranty

Dorman engine harmonic balancers are manufactured to meet OEM standards for fit, form, and function. While this product does not include mounting hardware, it is built to provide reliable performance for Chevrolet Express 3500 and GMC Savana 3500 vehicles. Warranty coverage details should be confirmed at the point of purchase or through Dorman’s official channels.