Engine coolant temperature sensor-3.9/5.2/5.9L engines. Engine coolant temperature sensor-4.7L v-8 engine

Engine coolant temperature sensor-3.9/5.2/5.9L engines

The engine coolant temperature sensor is installed into a water jacket at front of intake manifold near rear of generator (Fig. 34).

Fig. 32 Oxygen Sensor Locations-4.7L V-8 Engine

REMOVAL

WARNING: HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING. COOLING SYSTEM MUST BE PARTIALLY DRAINED BEFORE REMOVING THE COOLANT TEMPERATURE SENSOR.

REFER TO GROUP 7, COOLING.

(1) Partially drain cooling system. Refer to Group 7, Cooling.

(2) Disconnect electrical connector from sensor (Fig. 34).

(3) Engines with air conditioning: When removing the connector from sensor, do not pull directly on wiring harness. Fabricate an L-shaped hook tool from a coat hanger (approximately eight inches long). Place the hook part of tool under the connector for removal. The connector is snapped onto the sensor. It is not equipped with a lock type tab.

(4) Remove sensor from intake manifold.

INSTALLATION

(1) Install sensor.

(2) Tighten to 11 N*m (8 ft. lbs.) torque.

(3) Use long needlenose pliers to connect electrical connector to sensor. The sensor connector is symmetrical (not indexed). It can be installed to the sensor in either direction.

(4) Replace any lost engine coolant. Refer to Group 7, Cooling System.

Engine coolant temperature sensor-4.7L v-8 engine

REMOVAL

WARNING: HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING. COOLING SYSTEM MUST BE PARTIALLY DRAINED BEFORE REMOVING THE ENGINE COOLANT TEMPERATURE (ECT) SENSOR. REFER TO GROUP 7, COOLING.

Fig. 33 Air Cleaner Housing Assembly

1 - AIR CLEANER ELEMENT COVER

2 - TABS

3 - HOUSING

Fig. 34 Engine Coolant Temperature Sensor-3.9/ 5.2/5.9L Engines-Typical

1 - GENERATOR

2 - A/C COMPRESSOR

3 - ENGINE COOLANT TEMPERATURE SENSOR

4 - ELEC. CONN.

The ECT sensor is located near the front of the intake manifold (Fig. 35).

(1) Partially drain cooling system. Refer to Group 7, Cooling.

(2) Disconnect electrical connector from ECT sensor.

(3) Remove sensor from intake manifold.

Fig. 35 Engine Coolant Temperature Sensor-4.7L V-8 Engine

1 - ECT SENSOR

2 - MOUNTING BOLTS (2)

3 - MAP SENSOR

4 - INTAKE MANIFOLD

INSTALLATION

(1) Install sensor.

(2) Tighten to 11 N*m (8 ft. lbs.) torque.

(3) Connect electrical connector to sensor.

(4) Replace any lost engine coolant. Refer to Group 7, Cooling System.