Expansion Valve: Service and Repair

Thermal Expansion Valve Replacement

Special Tools

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the air cleaner outlet duct.
3. If equipped, remove the windshield washer solvent heater.




4. Remove the evaporator thermal expansion valve (TXV) tube from the TXV.
5. Remove and discard the seal washers.




6. Remove the TXV bolts.
7. Remove the TXV.
8. Remove and discard the seal washers.

Installation Procedure




1. Install new seal washers to the evaporator core fittings.
2. Install the TXV.

Notice: Refer to Fastener Notice.

3. Install the TXV bolts.

Tighten the bolts to 5 N.m (44 lb in).




4. Install new sealing washers on the evaporator TXV tube fittings.
5. Install the condenser tube and evaporator hose to the TXV.
6. Install the TXV nut.

Tighten the nut to 20 N.m (15 lb ft).

7. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging.
8. If removed, install the windshield washer solvent heater.
9. Install the air cleaner outlet duct.
10. Leak test the fittings using the J 39400-A.