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Home >> Chevrolet >> 1981 >> Chevette Scooter, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Air Injection Reactor System >> Testing >> Check Valve
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Check Valve

  1. Inspect check valve whenever working on A.I.R. system. If pump was inoperative and had signs of exhaust gases reaching pump, a failed check valve would be indicated.
  2. After detaching valve, blow through it in direction of flow to cylinder head, then attempt to suck back against direction of flow. Replace valve if it allows airflow against direction of flow.
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