Expansion Valve: Service and Repair

Thermostatic Expansion Valve













Removal and Installation

All vehicles

1. Recover the refrigerant.

5.4L vehicles

2. Drain the engine coolant. For additional information, refer to Cooling System.

3. Disconnect the heater hose fittings at the rear of the RH cylinder head and position the heater hoses aside.





4. Remove the EGR system module tube. For additional information, refer to Emission Control Systems.

5. Remove the Thermostatic Expansion Valve (TXV) fitting nut.
- Discard the gasket seals.

- To install, tighten to 15 Nm (133 lb-in).

6. Remove the 2 TXV bolts.

7. Remove the TXV.
- Discard the gasket seals.

8. To install, reverse the removal procedure.
- Install new gasket seals.

- Add the correct amount of clean PAG oil to the refrigerant system.

9. Evacuate, leak test and charge the refrigerant system.

5.4L vehicles

10. Fill the engine cooling system. For additional information, refer to Cooling System.