Balance Shaft

The purpose of the balance shaft is to offset the normal vibration found in most inline-four cylinder engines. The balance shaft rotates an “off center” weight that counteracts the engine vibration.

Symptoms of a Bad or Failing Balance Shaft

  • Abnormal engine noise

Balance Shaft Related Repair Advice

  • The balance shaft may be gear-, chain-, or belt-driven
  • If equipped, the balance shaft belt should be replaced whenever the timing belt is replaced

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