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Thread: Question about strange tube that leads into fire wall?

  1. #1

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    1990 Mitsubishi Mighty Max
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    Question about strange tube that leads into fire wall?

    Hello everyone! I just got a 90 Mighty Max yesterday and I noticed just a few minutes ago that there's a tube dumping some fluid onto the ground. I've got an idea as to what it may be, but I just wanted to ask here to be sure. It's a black rubber hose on the passenger side and faces down to the ground and has some kind of nozzle at the end and doesn't appear to connect to anything. Following the hose up, it goes through the firewall on the passenger side. The fluid is thin and appears to be yellowish, but that might be because of the plywood it landed on. The fluid doesn't smell like much of anything and is really thin, I'm thinking its maybe water? If anyone knows for sure then please let me know. Thank you!

    Here is a link to images I took of the hose: https://imgur.com/a/L0NpdyO

  2. #2

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    aircon drain?

  3. #3



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    Yup, seems like that'd be the A/C condensation drain. The evaporator coil inside the cabin HVAC box condenses moisture out of humid air, so that water has to drain out somewhere, hence the hose.
    1987 Dodge Ram 50 4G54 RWD longbed ("Elmo")
    1979 Lancia Beta Zagato spider ("Lola")
    1982 Lancia Beta Zagato spider ("Luigi")

  4. #4

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    Quote Originally Posted by SubGothius View Post
    Yup, seems like that'd be the A/C condensation drain. The evaporator coil inside the cabin HVAC box condenses moisture out of humid air, so that water has to drain out somewhere, hence the hose.
    Ah alright, I figured thats what it could be for, though I’ve never heard of this before. Thank you for the explanation as well!

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