Engine Coolant Temperature Sensor - Removal

5.7L/6.1L ENGINE










The Engine Coolant Temperature (ECT) sensor on the 5.7L/6.1L engine is located under the air conditioning compressor (1). 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.

NOTE: Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse.

1. Partially drain the cooling system Service and Repair.
2. Remove accessory drive belt Serpentine Accessory Drive Belt - Removal.
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 (3). A/C Compressor - Removal
4. Disconnect electrical connector (2) from sensor (3).
5. Remove sensor (3) from engine cylinder block (1).