Practice question

What is the most likely symptom of valve clearances that are set too loose?

  1. Complete failure of the engine to start due to lack of spark
  2. Excessive mechanical tapping noise from the cylinder head
  3. The engine locking up due to piston-to-valve contact
  4. Rapid burning and deterioration of the exhaust valve face

Answer: B — Excessive mechanical tapping noise from the cylinder head

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