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REMOVAL (1) Drain the cooling system (Refer to 7 - COOL- ING/ENGINE - STANDARD PROCEDURE). (2) Detach power cord plug from heater (Fig. 8). heater assembly (Fig. 8). INSTALLATION (1) Thoroughly clean core hole and heater seat. tioned upward (Fig. 8). (3) With heater seated, tighten center screw securely to assure a positive seal. (4) Connect power cord to block heater (Fig. 8). ENGINE - STANDARD PROCEDURE). ENGINE COOLANT TEMP DESCRIPTION The engine coolant temperature (ECT) sensor threads into the rear of the cylinder head, next to the The ECT Sensor is a Negative Thermal Coefficient (NTC) Sensor. The resistance of the ECT Sensor changes as coolant temperature changes. This results OPERATION The ECT sensor provides an input to the PCM. As temperature increases, resistance of the sensor decreases. As coolant temperature varies, the ECT REMOVAL (1) With the engine cold, drain coolant until level drops below cylinder head (Refer to 7 - COOLING/ (2) Disconnect coolant sensor electrical connector (Fig. 9). (3) Remove coolant sensor. INSTALLATION (1) Install coolant sensor. Tighten sensor to 18 N·m (165 in. lbs.) torque. (2) Attach electrical connector to sensor (Fig. 9). GINE - STANDARD PROCEDURE). Fig. 8 Engine Block Heater 1 - CORE PLUG Fig. 9 Engine Coolant Temperature Sensor—SOHC 1 - ENGINE COOLANT TEMPERATURE SENSOR 7 - 22 ENGINE - 2.0L SOHC PL/SRT-4 ENGINE BLOCK HEATER (Continued) |