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Home >> Subaru >> 1982 >> Brat GL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Ignition Control System >> Testing >> Thermal Vacuum Valve
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Thermal Vacuum Valve

  1. Remove valve from manifold and attach hoses to 2 lower ports. Cap upper port on valve. Submerge valve in container of water.
    CAUTION: Do not let water enter valve.
  2. With water temperature below 50°F (10°C), valve should be closed and air should not pass through hoses. With water above 68°F (20°C), valve should be open. If not, replace valve.