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Expansion Valve Replacement

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  1. Recover the refrigerant with a recovery/recycling/charging station (see REFRIGERANT RECOVERY ).
  2. Disconnect the suction line and receiver line from the evaporator core (see step 2 on BLOWER UNIT COMPONENT REPLACEMENT ).
  3. Remove the blower unit (see BLOWER UNIT REMOVAL/INSTALLATION ).
  4. Remove the joint duct (see step 4 on BLOWER UNIT COMPONENT REPLACEMENT ).
  5. Remove the bolts, inlet and outlet pipes (A), and expansion valve (B).
    Fig 1: Inlet/Outlet Pipes And Expansion Valve With Torque Specifications
    G05968454Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. 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 is no air leakage.
    • Charge the system (see SYSTEM CHARGING ).
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