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Home >> Mazda >> 1983 >> B2000 Sundowner Sport >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System - CALIF >> Component Testing >> Check Valves

Check Valves

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  1. Warm engine until normal operating temperature is reached. Stop engine and disconnect air hose from check valve connector.
  2. Slowly increase engine speed to 1500 RPM while holding hand over open connection. Check for exhaust leak from check valve. If exhaust gas escapes, replace check valve.
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