EG–341 ENGINE – COOLING SYSTEM THERMOSTAT REMOVAL HINT: Removal of the thermostat would have an adverse ef- fect, causing a lowering of cooling efficiency. Do not remove the thermostat, even if the engine tends to overheat. 1. 2JZ–GTE: REMOVE ENGINE UNDER COVER 2. DRAIN ENGINE COOLANT P11520 3. 2JZ–GE: DISCONNECT WATER INLET FROM WATER PUMP, AND REMOVE THERMOSTAT (a) Remove the 2 nuts holding the water inlet to the water pump, and disconnect the water inlet from the water pump. (b) Remove the thermostat. (c) Remove the gasket from the thermostat. P11521 4. 2JZ–GTE: REMOVE WATER INLET, LOWER RADIATOR HOSE AS- SEMBLY AND THERMOSTAT (a) Disconnect the lower radiator hose from the radiator. (b) Remove the 2 nuts holding the water inlet to the water pump, and disconnect the water inlet and lower radiator hose from the water pump. (c) Remove the thermostat. (d) Remove the gasket from the thermostat. THERMOSTAT INSPECTION INSPECT THERMOSTAT HINT: The thermostat is numbered with the valve opening temperature. P11116 82°C CO0601 (a) Immerse the thermostat in water and gradually heat the water. (b) Check the valve opening temperature. Valve opening temperature: 80–84°C (176–183°F) If the valve opening temperature is not as specified, replace the thermostat.