Expansion Valve: Service and Repair

A/C Expansion Valve Replacement

1. Remove the blower/evaporator unit. Blower/Evaporator Unit Removal/Installation (With A/C)

2. Remove the evaporator core. Blower/Evaporator Unit Component Replacement (With A/C)

3. Remove the bolts (A).

4. Remove the outer seal (B) and the expansion valve (C).

5. Install the expansion valve in the reverse order of removal and note these items:
- If you're installing a new expansion valve, add refrigerant oil (SP-10). A/C Refrigerant Oil Replacement (With A/C)

- Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.

- Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture absorption.

- Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately.

- Make sure that there is no air leakage.

- Charge the system. A/C System Charging (With A/C)