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Thread: A/C expansion valve

  1. #1
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    A/C expansion valve

    Hi everyone,

    I would like to ask if any of you replaced the A/C expansion valve in your D4? Mine seems to be blocked unfortunately and I'm slowly getting ready for this task and I'm trying to gather as much information as possible on how to get there without demolishing the entire dashboard.

    Thanks

  2. #2
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    The valve normally in question is the one on the compressor but probably better to change the entire compressor than risk all the labour on an older vehicle.

  3. #3
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    A/C Replacement

    I recently replaced the compressor and evaporator on my SDV6, it is not an easy job at all. Quite the mission. I read somewhere the workshop guideline is 4 hours but no one I saw online has done it in anything like that. Took me probably 10-11 hours and it is a real pain in the butt job. I don’t think I’d do it again. Plus you need to flush the system so I had to buy a tool for that, unless you can get a mobile guy to come and flush then come back when you have put it back together. All in all it’s a bastard of a job.

  4. #4
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    There is a video somewhere on it. The entire dashboard, lower consoles, everything has to come out to get to the ac box and valve. It looks like a horrendous job. I hope you’re sure it needs replacing because on these, it’s avoided at all costs and not something you do routinely like on other vehicles.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

  5. #5
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    Did Screaminkiw replace the TX valve and was it a dash out job? I've removed the aircon compressor and condenser/drier, which took me a good 8hours. Now I'm told that I should flush the lines and replace the TX valve, looks like a dash out job.
    What is the special tool for flushing the system? Should I also be replacing the evaporator as there were metal flakes in the large bore pipe at the condenser.
    Dreading the dash removal, but if I have to...
    Any advice gratefully received.

  6. #6
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    Quote Originally Posted by Airmech953 View Post
    Did Screaminkiw replace the TX valve and was it a dash out job? I've removed the aircon compressor and condenser/drier, which took me a good 8hours. Now I'm told that I should flush the lines and replace the TX valve, looks like a dash out job.
    What is the special tool for flushing the system? Should I also be replacing the evaporator as there were metal flakes in the large bore pipe at the condenser.
    Dreading the dash removal, but if I have to...
    Any advice gratefully received.
    My “advice” is don’t. Just flush the evaporator with the TX in place it until it’s clean. Flush forwards and backwards and repeat until clean. Do it through the hoses. Buy an AC flushing kit. Watch some videos.

    There is a video I saw somewhere about how to get to the TX. I vaguely recall it’s a whole day to get the dash out if you go that route.
    2010 TDV6 3.0L Discovery 4 HSE
    2007 Audi RS4 (B7)

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