S-Type (X200) V6-3.0L (2000)
Thermostat: Testing and Inspection
Thermostat Test, Mechanical
NOTE: Fully open means the thermostat valve lifts a distance of 5.8 mm (0.2 inch) or more off the valve seat.
Remove the thermostat and immerse in a boiling antifreeze and water mixture. The thermostat should begin to open at