MR2 L4-132 2164cc 2.2L DOHC (5S-FE) (1993)
Thermal Vacuum Valve - EVAP: Testing and Inspection
Fig. 9 Testing TVV - Closed Position
Fig. 10 Testing TVV - Open Position
1. Drain the coolant from the radiator into a suitable container.
2. Unscrew and remove the TVV.
3. Cool the TVV to below 95°F (35°C) with cold water. Fig. 9
4. Blow air into either inlet pipe and check that air does NOT pass through valve.
5. Heat the TVV to above 129°F (54°C) with hot water. Fig. 10
6. Blow air into either inlet pipe and check that air does pass, (valve open).
7. If a problem is found, replace TVV.
8. Apply a suitable sealing compound to the TVV threads and reinstall.
9. Refill the radiator with coolant.