Thermal Vacuum Valve - EVAP: Testing and Inspection

Thermal Vacuum Valve (TVV)

1. DRAIN ENGINE COOLANT
2. REMOVE TVV FROM INTAKE MANIFOLD




3. INSPECT TVV OPERATION
- Cool the TVV to below 4O°C (1O4°F) with cool water.
- Check that air does not flow from the upper port to lower port.




- Heat the TVV to above 59°C (138°F) with hot water.
- Check that air flows from the upper port to lower port.
- If operation is not as specified, replace the TVV.




4. REINSTALL TVV
- Apply adhesive to 2 or 3 threads of the TVV and install it.

Torque: 30 Nm (22 ft lb)

5. REFILL WITH ENGINE COOLANT