Dorman 594-312 | Engine Harmonic Balancer

Part Number
Harmonic Balancer Assembly

Fits: 00-05 Buick LeSabre, 00-05 Buick Park Avenue, 00-05 Pontiac Bonneville, 04-08 Pontiac Grand Prix, 05-09 Buick Allure, 05-09 Buick LaCrosse, 06-08 Buick Lucerne

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This direct replacement harmonic balancer features a stress-resistant rubber bond to properly absorb engine vibration. Ductile steel construction provides excellent tensile and impact strength for greater durability.

BRAND: Dorman - OE Solutions


  • Harmonic Balancer Assembly
  • Ideal replacement - this harmonic balancer assembly exactly matches the fit and function of the original harmonic balancer for a direct replacement
  • Durable construction - this harmonic balancer features a rubber vibration damper bonded between ductile steel components
  • Engine, Harmonic, Balancer, Balancers
  • Buick 2009-00, Pontiac 2008-00
  • Cost-effective solution - this balancer assembly offers original equipment quality at a competitive price
  • Quality tested - this harmonic balancer has undergone dimensional verification, material validation and functional testing to ensure performance


Bolt And Washer IncludedYes
Center Bolt IncludedNo
Degree MarkingsNo
Drive Belt TypeSerpentine
Grade TypeRegular
Inside Diameter28.95
Mounting Hole Quantity1
Outside Diameter181.8
Package ContentsHarmonic Balancer; Woodruff Key
Pulley Groove Quantity6



  • ATP: 102284
  • DAYCO: PB1434N
  • General Motors: 25534912


  • 2005-2009 Buick Allure - Position: N/A
  • 2006-2008 Buick Lucerne - Position: N/A
  • 2000-2005 Pontiac Bonneville - Position: N/A
  • 2004-2008 Pontiac Grand Prix - Position: N/A
  • 2005-2009 Buick LaCrosse - Position: N/A
  • 2000-2005 Buick LeSabre - Position: N/A
  • 2000-2005 Buick Park Avenue - Position: N/A
Customer Questions
Will an engine flush clean my pistons?
No, an engine flush is unlikely to clean the pistons.
How to replace engine pistons?
Replacing engine pistons involves removing the engine from the vehicle, disassembling it, removing the pistons, inspecting the engine components, installing the new pistons, reassembling the engine, and testing it. It's a complex process that should only be attempted by experienced mechanics.
When do engine pistons rings go bad?
Engine piston rings can go bad due to wear and tear, inadequate lubrication, overheating, manufacturing defects, or improper installation. Symptoms of failing piston rings include reduced engine power, increased oil consumption, and blue smoke from the exhaust. Regular maintenance and inspection can help identify potential issues.
Why do engine piston rings fail?
Engine piston rings can fail due to wear and tear, inadequate lubrication, overheating, manufacturing defects, or improper installation. Regular maintenance and inspection of the engine can help identify potential issues. Symptoms of failing piston rings include reduced engine power, increased oil consumption, and blue smoke from the exhaust.
Can you replace engine pistons rings without removing the engine?
Replacing engine piston rings without removing the engine is possible but not recommended due to the extensive disassembly required and the risk of damaging other engine components. A full rebuild or overhaul is generally more efficient and effective.
Can I use Dorman parts to replace OEM parts?
Yes, Dorman parts can often be used as replacements for OEM parts, but it is important to carefully compare specifications and ensure compatibility.
How do I install Dorman shift linkage bushing?
To install a Dorman shift linkage bushing, first locate the old bushing and remove it if necessary. Apply lubricant to the Dorman bushing and slide it onto the shift linkage, tapping it into place with a soft tool until fully seated. Check the alignment and function of the shift linkage after installation.
Where is Dorman manufactured?
Dorman is a global automotive parts supplier with manufacturing facilities in the United States, Mexico, Canada, China, and India. Its headquarters and largest manufacturing facility are located in Colmar, Pennsylvania, USA.
Are oil pump gears necessary?
Yes, oil pump gears are essential for maintaining proper engine lubrication in an internal combustion engine.
How do oil pumps work?
Oil pumps work by creating pressure to circulate engine oil throughout an internal combustion engine.
Where is the oil pump located?
The oil pump is typically located inside the engine's lower oil pan or sump.
Why do oil pump failures happen?
Oil pump failures can arise from wear, contamination, poor maintenance, and manufacturing defects, causing inadequate lubrication and potential engine damage.
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