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Fluidampr 890101 Harmonic Balancer Duramax 2001-2005 LB7 LLY

890101 - 13C
2001-2005 LB7 and LLY Duramax
Pricing: $563.55

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Each time the air/fuel mixture inside a cylinder is ignited, the combustion that occurs creates a torque spike that is applied to the crankshaft through the piston and rod. This torque spike is so severe that it not only turns the crankshaft, it actually twists the crankshaft ahead of its normal rotation and then the crankshaft rebounds. This twisting action is known as torsional vibration. When these torque spikes and forces get into phase with the natural frequency, critical torsional harmonic vibrations occur and can be seriously destructive to the bearings and the crankshaft. Dampers are designed to control those destructive vibrations. 


  • Outside Diameter:  8-3/8"
  • Bore Diameter:  1.9300"
  • Length:  2.858"
  • Weight / Lbs (Rotating Weight / Lbs.):  23.9 (15.9)
  • Finish:  Black Zinc Chromate



Shipping Information

  • Item Requires Shipping
  • 23.0 lbs.
  • W13.0000” x H13.0000” x L8.0000”
  • Free Shipping

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