5.7L/6.1L Engine

Fig 1: Remove/Install ECT 5.7L

Courtesy of DAIMLERCHRYSLER CORP.

The Engine Coolant Temperature (ECT) sensor (3) on the 5.7L/6.1L 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.

Partially drain the cooling system (Refer to COOLING - STANDARD PROCEDURE) .
Remove accessory drive belt (Refer to COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL) .
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).
Disconnect electrical connector (2) from sensor (3).
Remove sensor (3) from cylinder block.