Thermal Vacuum Valve
NOTE:
A 3-port thermal vacuum valve is used on California 210 & 310 models in place of a 2-port valve, used on all other models. The bottom port of the 3-port valve is used for distributor advance.
- Drain engine coolant and remove thermal vacuum valve from engine with vacuum hoses attached.
- Submerge valve and thermometer in a container of water. Heat water and observe temperature. Apply vacuum to top port and check that valve opens and closes according to water temperatures specified in "Thermal Vacuum Valve Specifications
" table. If valve does not operate as specified, replace it.NOTE: Do not allow water to enter thermal vacuum valve during test.