Nissan and Datsun Workshop Service and Repair Manuals

Thermal Vacuum Valve: Testing and Inspection

Fig. 78 Thermal vacuum valve operating specifications.

1. Drain cooling system.
2. Remove thermal vacuum valve.
3. Place thermal vacuum valve in container of water with thermometer.

CAUTION:Do not allow water to enter thermal vacuum valve.

4. Plug top port and apply vacuum to bottom port
5. Slowly heat water and check that thermal vacuum valve operates within specifications, Fig. 78