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Thread: Mystery leak, experience/advice sought

  1. #1
    Join Date
    May 2011
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    Mystery leak, experience/advice sought

    Evening,

    Am trying to solve a mystery leak that's popped up over the past few weeks, which reoccurs on a regular basis. Am driving a 2010 MKVI GTI.

    Occurence:
    - Most times I stop the car, or start moving with a reasonable level of brake force (i.e. stopping in my street to reverse up the driveway), I notice that there's a very small pool of liquid on the ground where I stopped.
    - If I stopped and started reversing/driving quickly, the pool is in a line, so it's a leak when there are G-forces on the car.

    Fluid:
    - The leak is clear, and I've mopped it up and checked it out on multiple ocasions.
    - Smells like stale water, looks like stale water, with a hint of chemical.
    - If left on the road, it evaporates completely after a few minutes.
    - I think? it's water.

    Narrowing things down:
    - It's not radiator fluid, as that's a purple colour, and over the last few weeks, I've confirmed no change in level. Also smells entirely different.
    - It's not windscreen wiper fluid, as I use the VW solution in mine, and that has a distinctive smell. Also, the anti-freeze in that would prevent evaporation?
    - It's not engine oil, due to the colour/smell/evaporation.

    Other information:
    - On occasion, it looks like there's a bit of water inside the engine bay (right at the bottom, in about the right quantities), but it hasn't been raining on that day / etc.

    Theories:
    - I have two theories right now.
    1. There's a leak inside the engine, due to a crack / etc, which I would love some clarification on! Also, if water's leaking, where is it coming from?
    2. On the other hand, it could be from the windscreen's drainage channels being blocked, and going a little funny? I don't know enough about how they work though.

    Any help would be appreciated!

  2. #2
    Join Date
    Feb 2011
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    Is it condensation leaking from you air conditioning pipes?

    Sounds like it to me. It's perfectly normal by the way for it to drip on the road when you have the a/c running.
    2017 Ford Fiesta ST the go kart

    2015 Audi SQ5 bi-turbo V6 TDI family hauler

  3. #3
    Join Date
    Aug 2008
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    South Australia
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    Quote Originally Posted by Lucas_R View Post
    Is it condensation leaking from you air conditioning pipes?

    Sounds like aircon fluid to me

  4. #4
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    Oct 2009
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    My old car (not a VW) did this. It was the aircon
    06 VW 9N3 Polo GTI - Reflex Silver Leather/OEM Colour coded S/guard/OEM Lower Honeycombe Grille/NSP Boost Gauge/APR Stage 1+,Dogbone & DP/K&N filter/Forge s/shift,DV008 & Strut brace/PD 160/Samco camo TIP/Whitline RSB/FK AK's/17 x 8 Oettiger RE's/Alpine Head Unit & Sony Amp. OEM+FTW

  5. #5
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    Aug 2011
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    I'm 100% this is condensation from your AC drain.

  6. #6
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    Apr 2009
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    Yeah just condensation that has accumalated in the normal processes of your air conditioner. Quite normal, will probably be worse on a humid day as the A/C removes moisture from the air.

    GTI MY16.5 PURE WHITE | LAKIN PLATE HOLDER | TINTS |

  7. #7
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    Panic bro, your flux capacitor is running out of Noonie juice!


  8. #8
    Join Date
    May 2011
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    Australia
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    Users Country Flag Thread Starter
    Thanks guys, appreciate the advice! Was getting worried it was the water pump or sumfin'

  9. #9
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    Aug 2011
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    Melbourne, Victoria
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    Now go out and do some celebratory skids.


  10. #10
    Join Date
    May 2011
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    Quote Originally Posted by mythik View Post
    Now go out and do some celebratory skids.

    Reverse burnouts with the AC on Max to celebrate?

    There'll be two lines of rubber, and one in the middle of an indistinguishable fluid - legit :p

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