Thermostat, Engine Cooling

Temperature sticks can be used to determine a thermostat's operating range' by rubbing 87°C (188°F) and 97°C (206°F) sticks on the thermostat housing.
Use a tempilstick in order to find the opening and the closing temperatures of the coolant thermostat.
J 24731-188 tempilstick melts at 87°C (188°F). The thermostat should begin to open.
J 24731-206 tempilstick melts at 97°C (206°F). The thermostat should be fully open.