Thermal Vacuum Valve - EVAP: Testing and Inspection

NOTE: For the quick check of the operation, BVSV can be checked by warming up or cooling down the engine without being removed from the intake manifold.

The check procedure is the same as the following except items 1, 2 and 5.


1. Drain cooling system when engine is cold.

2. Remove ISC solenoid valve bracket from intake manifold and remove BVSV from intake manifold.

Checking Bi-Metal Vacuum Switching Valve (Cold):

3. While keeping BVSV cool (below 45° C (1 13° F)), blow nozzle. Air should come out of filter.

Checking Bi-Metal Vacuum Switching Valve (Hot):

4. While keeping BVSV warm (above 6O° C (140° F)) in hot water, blow nozzle. Air should not come out of filter.

5. Reinstall BVSV to intake manifold. Before installing, wind sealing tape on its thread. Install ISC solenoid valve bracket to intake manifold.

6. Connect BVSV vacuum hose.