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THERMO Vacuum Valve
- Remove valve from intake manifold. Connect hoses to ports for air cleaner and EGR valve (2 upper ports) and plug port to canister (lower port). Submerge valve into a container of cold water.
NOTE:
DO NOT allow water to enter valve.
- Heat water slowly. Blow air into valve and confirm valve opens or closes in response to water temperature.
- Thermo vacuum valve should be completely open below 86°F (30°C) and should completely close above 104°F (40°C). Remove thermovalve from water. Connect hoses to vacuum valve EGR valve port and canister port, and plug port to air cleaner.
- Blow air into valve and confirm that valve opens and closes in response to water temperature. Valve should completely open below 86°F (30°C) and should completely close above 104°F (40°C).
Courtesy of SUBARU OF AMERICA, INC.