Somerset V6-181 3.0L (1986)
Thermal Vacuum Valve - Carb: Description and Operation
Cold Engine Air Bleed Thermal Vacuum Switch (CEAB-TVS)
This switch remains open to allow cold air bleed through the switch to the intake manifold when engine coolant temperature is below the switching
point. When engine coolant temperature is above the switching point, the switch closes and stops air flow to the manifold.
