Express 4500 V8-6.6L DSL Turbo (2009)
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
Engine Coolant Temperature Sensor Replacement
Removal Procedure
Caution: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. Remove the intake manifold tube. Refer to Intake Manifold Tube Replacement (LMM) (See: Engine, Cooling and Exhaust/Engine/Intake
Manifold/Service and Repair).
2. Drain the coolant to a level below the engine coolant temperature (ECT) sensor. Refer to Cooling System Draining and Filling (Static Fill) (See:
Engine, Cooling and Exhaust/Cooling System/Service and Repair)Cooling System Draining and Filling (Vac N Fill) (See: Engine, Cooling and
Exhaust/Cooling System/Service and Repair).
3. Disconnect the engine wiring harness electrical connector(s) (1) from the appropriate ECT sensor (s).
4. Remove the appropriate ECT sensor(s) (1).
