12. COOLING SYSTEM DINK50/ 125 INSPECTION Suspend the thermostat in a pan of water over a burner and gradually raise the water temperature to check its operation. Thermostat Technical Data Thermometer Begins to open 80 - 82°C (176 - 180°F) Full-open 90°C (198°F) Valve lift 3.5 mm (0.14 in) minimum · Do not let the thermostat touch the pan as it will give a false reading. · Replace the thermostat if the valve stays open at room temperature. ·Test the thermostat after it is opened for about 5 minutes and holds the temperature at 70. ASSEMBLY O-ring Thermostat assembly is in the reverse order of disassembly. Thermostat Housing 12-22