Expansion Valve: Service and Repair

A/C Expansion Valve Replacement

1. Remove the evaporator core. Service and Repair

2. Remove the insulator (A) and bolts, then remove the expansion valve (B) and O-rings (C).

3. Install the expansion valve in the reverse order of removal, and note these items:
- 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 are no air leaks.

- Charge the system. A/C System Charging