Dorman 594-709 Engine Harmonic Balancer

Dorman 594-709 Harmonic Balancer

Dorman 594-709 is a direct replacement engine harmonic balancer built for select Cadillac applications. It uses a stress-resistant rubber bond to help absorb engine vibration, while ductile steel construction adds tensile and impact strength for long-term durability.

Key Features

• Direct replacement harmonic balancer for engine vibration control
• Stress-resistant rubber bond helps isolate torsional vibration
• Ductile steel construction for added strength and durability
• Black finish
• Serpentine drive belt type with 10 pulley grooves
• Outside diameter: 176 mm; inside diameter: 34.9 mm; depth: 42 mm
• Mounting hole quantity: 1; mounting hole diameter: 52.3 mm

Detailed Description

This Dorman harmonic balancer, part number 594-709, is built for engine applications that require stable vibration damping and reliable pulley alignment. It is compatible with 2005-2010 Cadillac STS and 2004-2009 Cadillac SRX, making it a direct-fit option for owners searching for a Cadillac STS harmonic balancer or a Cadillac SRX engine balancer replacement. The 10-groove serpentine pulley design supports the accessory drive layout, while the rubber bond and ductile steel body work together to manage engine harmonics and maintain durability under operating stress. Interchange reference: this part cross-references OE number 12564139 for the same application.

What It Helps Address

• Engine vibration transmitted through the crankshaft pulley area
• Worn or deteriorated harmonic balancer rubber bond
• Pulley wobble or imbalance related to balancer wear
• Accessory drive noise caused by a failing balancer
• Replacement needs for Cadillac STS and Cadillac SRX harmonic balancer service

Installation Notes and Tips

Verify pulley groove count, outside diameter, inside diameter, and mounting dimensions before installation. Confirm the serpentine belt routing and inspect the crankshaft snout, keying surface, and surrounding components for wear or damage. Use the correct service procedure and torque specifications for the vehicle application. Dorman 594-709 is intended for direct replacement use on the listed Cadillac STS and Cadillac SRX fitments.

Quality Assurance

Dorman manufactures replacement components with OE-style fit and function in mind, using materials selected for strength and vibration control. Part number 594-709 is engineered as a direct replacement harmonic balancer for the confirmed Cadillac applications listed above.