Dorman 594-451 Engine Harmonic Balancer

Dorman 594-451 Harmonic Balancer

Restore proper crankshaft vibration control with this direct replacement harmonic balancer from Dorman. Built with a stress-resistant rubber bond and ductile steel construction, it is made for dependable vibration absorption and long-term durability in service.

Compatible with Buick Regal, Chevrolet Captiva Sport, Buick Verano, Buick Allure, Buick LaCrosse, Chevrolet HHR, Chevrolet Cobalt, Saturn Ion, and Saab 9-5 applications that use a 6-rib serpentine belt. Part number 594-451 is also a direct reference for OE-style replacement needs on these vehicles.

Key Features

• Direct replacement harmonic balancer for engine vibration control
• Stress-resistant rubber bond helps absorb torsional engine vibration
• Ductile steel construction for tensile and impact strength
• Black finish with degree markings for timing reference
• Designed for serpentine belt applications with 6 pulley grooves
• Includes harmonic balancer only

Detailed Description

Dorman 594-451 is engineered as a direct replacement engine harmonic balancer for select GM and Saab applications. It uses a bonded rubber isolator to help dampen crankshaft vibration, while the ductile steel body adds strength for demanding engine operation. Key dimensions include a 28.01 inside diameter, 166.2 outside diameter, and 60.2 depth, with one mounting hole and degree markings for service reference. This part cross-references OE numbers 12583151 and PB1524N for the same application.

Search terms such as harmonic balancer for 2011-2015 Buick Regal, 2008-2015 Chevrolet Captiva Sport harmonic balancer, and 2004-2007 Saturn Ion crankshaft balancer align with this application set. Part number 594-451 is also relevant for 2010 Buick LaCrosse, 2010 Chevrolet HHR, and 2005-2007 Chevrolet Cobalt service work.

What It Helps Address

• Engine vibration felt through the accessory drive
• Crankshaft torsional oscillation that can affect smooth operation
• Wear or failure of the original balancer rubber bond
• Timing reference visibility during service checks
• Replacement needs after balancer cracking, separation, or wobble

Installation Notes and Tips

• Verify 6-rib serpentine belt configuration before ordering.
• Confirm the vehicle does not use a slip-fit balancer where noted in fitment.
• Inspect the crankshaft snout, keyway area, and belt alignment before installation.
• Use the degree markings as a reference during timing-related service.
• Center bolt and washer are not included.

Quality Assurance

Dorman manufactures this harmonic balancer as a direct replacement part with materials selected for vibration control and durability. The ductile steel construction and bonded rubber isolator support consistent performance in the listed Buick, Chevrolet, Saturn, and Saab applications.