EVAP Thermal Vacuum Valve
- Drain cooling system. Remove EVAP TVV located in coolant passage. See Figure.
- Use cool water to cool threaded end of EVAP TVV to less than 122°F (50°C). Apply air pressure to top port on EVAP TVV. Ensure EVAP TVV is closed and no air will pass through lower port.
- Heat water to greater than 149°F (65°C). Apply air pressure to top port on EVAP TVV. Ensure EVAP TVV is open and air passes through lower port. Replace EVAP TVV if defective. Apply thread sealant to threads of EVAP TVV and reinstall. Fill cooling system.