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