Thermal Vacuum Valve
The thermal vacuum valve is Blue and is installed in the thermostat housing. The valve is closed below 63° F (17° C) and open above this temperature. When the valve is open, EGR can take place.
The thermal vacuum valve is Blue and is installed in the thermostat housing. The valve is closed below 63° F (17° C) and open above this temperature. When the valve is open, EGR can take place.