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2000 Lexus RX300 Question: Do you have to remove the dash to change the AC expansion valve?

 

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ken bailey, 3.0L V6, Plant City, FL, March 22, 2011, 19:34
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Do you have to remove the dash to change an AC expansion valve? The compressor is blown and the system is contaminated, so I need a compressor, drier and expansion valve.

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  • Answer #1

    March 22, 2011, 19:51
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     Master

    Typically have to do some disassembly but not complete dash removal. If evaporator is in the way then will have to remove for access. Try this link:

    http://bit.ly/autozone_repair_info.

    Hope this helps.

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  • Answer #2

    March 22, 2011, 20:22
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     Master

    REMOVAL

    DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
    HINT: At the time of installation, please refer to the following item.
    Evacuate air from refrigeration system.
    Charge system with refrigerant and inspect for leakage of refrigerant.
    Specified amount: 650 ±50 g (22.92 ±1.76 oz.)
    REMOVE INSTRUMENT PANEL
    REMOVE EXPANSION VALVE
    Pry out the packings.
    HINT: At the time of installation, please refer to the following item. Do not reuse the packings.
    Using a hexagon wrench (5.0 mm, 0.20 in.) , remove the 4 bolts and tube and accessary.
    Torque: 5.4 Nm (55 kg.cm, 48 in.lb)
    NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.
    HINT: At the time of installation, please refer to the following item. Lubricate 4 new O-rings with compressor oil and install them to the tubes.
    Remove the expansion valve from tube connector.
    NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.
    HINT: At the time of installation, please refer to the follwing item. Lubricate 2 new O-rings with compressor oil and install them to the tubes.INSTALLATION
    Installation is in the reverse order of removal.

    the short answer is yes. lots of labor intensive work.

    good luck

    Roy

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  • Answer #3

    patrick mannion from Greg Solow's Engine Room, March 22, 2011, 23:27
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     Master

    Major dash disassemble required as Roy and Raderon have said. 6 hours work plus evacuation and recharging of the refrigerant. More important you need special equipment and gauges to evacuate refrigerant, store it, check the system for leaks and recharge the system, if not done correctly you can contaminate or damage the whole system.

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