Eldorado Emptying Water unto Floor
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500, 472, 425, 368 Discussion, Eldorado Emptying Water unto Floor in Cadillac Engine Technical Discussion; Hi, Has anyone any idea where the water drain pipe is for the AC. My 83 Eldorado 4.1 has started ...
  1. #1
    Cardiac is offline Cadillac Owners Member
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    Eldorado Emptying Water Onto Floor

    Hi,
    Has anyone any idea where the water drain pipe is for the AC. My 83 Eldorado 4.1 has started wetting the bed!!!! ahe is dumping a load of clean water down through the dash. I notice there is no little river when I park suggesting it's the AC drain water.
    I jacked her up this morning and got underneath but I am unable to locate the drain. Anyone any ideas where I should be looking???????

    Thanks in advance.

    Cardiac

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  3. #2
    djmumm is offline Cadillac Owners Member
    Automobile(s): 37s, 57s, 93 eldo, 02 DHS, 05 XLR
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    Re: Eldorado Emptying Water unto Floor

    I do not have experience with your particular year, but most GM's have a rubber valve on the bottom of the evaporator housing. It is usually hard to see from underneath or on top! It could be about 1.5 inches in diameter and about 1-2 inches long. It looks like a rubber funnel that the small end has been squashed flat. The rubber actually has a slit in the bottom and will open to drain water, but normally stays closed so that dust does not get sucked back into the evaporator housing. I had this type of valve fail on the sunroof drains on my 93 eldo. I ended up with a back seat full of water! The failure is that the rubber sticks shut, most often due to a mixture of dust and water the dries hard and seals it up. All you need to due is flex the rubber and the unwanted seal will be broken. Obviously, there is a chance that you have more junk in the housing and may need to take the "rubber funnel" off and clean it out.

    So, try to reach down around to the bottom of your evaporator housing and see if you can feel this valve under there. You may be able to see it from the bottom if you look straight up past the right side exhaust, and the subframe member just forward of the firewall. If you are lucky, you may even be able to reach it from underneath!
    Good luck
    Dave

  4. #3
    MMNineInchNails's Avatar
    MMNineInchNails is offline Cadillac Owners Enthusiast
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    Re: Eldorado Emptying Water unto Floor

    If when you turn on the A/C and it smells bad, that usually means your drain plug is plugged up and needs to be replaced. It's normal for it to drop out water.

  5. #4
    Cardiac is offline Cadillac Owners Member
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    Thanks for the responses, but...

    Thanks for the advise and I agree this is probably the cause OK but I cannot find the valve / funnel thingy. In fact to be honest I've just moved here from Ireland and I never worked on auto AC before. I dont know what the evaporator housing even looks like!!!!! I have been underneath looking and from the top. Have you any more specific details of where to find this. What will the evaporator housing look like?
    Thanks again for the help.
    Oh one more thing, what is the name of the very front most section of the front wing.

  6. #5
    djmumm is offline Cadillac Owners Member
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    Re: Eldorado Emptying Water unto Floor

    Ok, I am still going to prefas this with the statement that I do not have direct experience with your year car, but I will relay my experience with many other GM cars.

    The evaporator housing is on the firewall on the right (passenger) side of the car and will come up to nearly touching the hood when shut. It is about 12 inches, front to back, 6 inches, left to right, and 12 inches tall. It will have a 1 inch diameter aluminum tube coming out towards the front of the car. It is usually made of a composite of plastic and fiberglass and is usually black in color. Let me know if this helps. Dave

  7. #6
    Cardiac is offline Cadillac Owners Member
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    Found It!!

    Thank you so much. I had a look as soon as I read you last post. It seem to be a 1/2-5/8 hole protruding from the rear underside of the "Evaporator Housing" I presseed a straw up into it and water flowed out. It sounded like I was opening a little metal flap inside. This was all done from above.
    Thanks a million.
    Cardiac


    Does anyone know what you call the nose piece to the front wing, or where I might go to get one The car car would be back in good shape.

    Thanks

  8. #7
    djmumm is offline Cadillac Owners Member
    Automobile(s): 37s, 57s, 93 eldo, 02 DHS, 05 XLR
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    Re: Eldorado Emptying Water unto Floor

    Glad it worked out for you. Using a straw was a smart idea. You sure don't want to poke a hole in your A/C evaporator.

    I'm curious about the protruding hole. Would it resemble a nipple that you would put a hose on? If so, perhaps your rubber valve is missing and that is the root cause of your problem.

    Dave

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