4 Runner 2WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1992)
Thermal Vacuum Valve - EVAP: Testing and Inspection
Fig. 9 Testing BVSV - Closed Position
Fig. 10 Testing BVSV - Open Position
1. Drain the coolant from the radiator into a suitable container.
2. Unscrew and remove the BVSV.
3. Cool the BVSV to below 35°C (95°F) with cold water. Fig. 9
4. Blow air into either inlet pipe and check that air does NOT pass through valve.
5. Heat the BVSV to above 54°C (129°F) 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 BVSV.
8. Apply a suitable sealing compound to the BVSV threads and reinstall.
9. Refill the radiator with coolant.