RAM 3500 Truck 2WD V8-5.7L VIN D (2003)
Radiator Cooling Fan Temperature Sensor / Switch: Service and Repair
ENGINE COOLANT TEMPERATURE SENSOR - 5.7L V-8
REMOVAL
The Engine Coolant Temperature (ECT) sensor on the 5.7L engine is located under the air conditioning compressor. It is installed into a water jacket
at the front of the cylinder block.
WARNING: HOT, PRESSURIZED COOLANT CAN CAUSE INJURY BY SCALDING. COOLING SYSTEM MUST BE PARTIALLY
DRAINED BEFORE REMOVING THE COOLANT TEMPERATURE SENSOR.
1. Partially drain the cooling system.
2. Remove fan belt.
3. Carefully unbolt air conditioning compressor from front of engine. Do not disconnect any A/C hoses from compressor. Temporarily support
compressor to gain access to ECT sensor.
4. Disconnect electrical connector from sensor.
5. Remove sensor from cylinder block.
