Coolant Thermo Valve (Man. Trans. & Turbo)
- Remove coolant thermo valve from engine. Immerse coolant thermo valve in water.
- Heat water gradually and observe the temperature. Below approximately 140°F (60°C), air should pass from top vacuum line to bottom vacuum line. Above approximately 140°F (60°C), air should pass from top vacuum line to orifice on top of thermo valve.