Thermal Vacuum Valve
Remove thermal vacuum valve from engine and place sensing portion in water 115°F (46°C) or warmer. Blow through hoses connected to valve. Air should pass, indicating valve is open. If not, replace valve.
Remove thermal vacuum valve from engine and place sensing portion in water 115°F (46°C) or warmer. Blow through hoses connected to valve. Air should pass, indicating valve is open. If not, replace valve.