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Expansion Valve Replacement

  1. Recover the refrigerant with a recovery/recycling/charging station (see REFRIGERANT RECOVERY  ).
  2. Remove the bolt from the A/C line clamp (A).
    Fig 1: A/C Line Clamp With Bolt With Torque Specifications
    G06953739Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Remove the bolt, then disconnect the A/C line (A) from the evaporator core, and remove the O-rings (B).
    Fig 2: A/C Line And O-Rings With Bolt With Torque Specifications
    G06953740Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Remove the blower unit (see DUST AND POLLEN FILTER REPLACEMENT  ).
  5. Disconnect the connectors (A) from the evaporator temperature sensor and the power transistor, then remove the connector clip (B). Remove the self-tapping screws, the expansion valve cover (C), and the seal (D).
    Fig 3: Identifying Evaporator Temperature Sensor Connectors, Connector Clip, Expansion Valve Cover And Seal
    G06953741Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Remove the self-tapping screw (A), push the upper cover (B) toward the front of the vehicle, then remove the upper cover.
    Fig 4: Pushing Upper Cover
    G06953742Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Remove the bolts and the expansion valve (A) and the inlet/outlet lines from the evaporator core assembly without bending the lines.
    Fig 5: Expansion Valve With Bolts With Torque Specifications
    G06953743Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Remove the inlet/outlet lines (A) from the expansion valve (B).
    Fig 6: Identifying Inlet/Outlet Lines And Expansion Valve
    G06953744Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. 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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