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A4 Avant small coolant leak

Discussion in 'Audi S4/A4/A4 Cab (B7 Chassis)' started by tomyoud, Jan 9, 2014.

  1. tomyoud
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    tomyoud New Member

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    [Jan 9, 2014]
    Hi Guys, I was wondering if someone could help me out here. I've just bought a 2008 1.9 TDi A4 Avant s-line. I have noticed that there is a very small leak around the thermostat housing area.

    View attachment 25520

    It's this metal pipe (second picture arrowed) I think which goes into where the thermostat goes and then into the heating matrix for the inside of the car. I can feel it's a little damp under the pipe and there is a small ledge for it to drip onto so there is a small amount on there.
    Can anyone shed some light on this for me to fix/how much it would cost from a dealer to fix?

    I don't think it's very serious at the moment because when I unscrew the expansion tank it has got lots of pressure.

    Many thanks
    Tom
    Last edited: Jan 9, 2014
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  3. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jan 9, 2014]
    I reckon a new o-ring would possibly fix this unless the pipes been damaged, if the stats been changed its possible o-ring was fitted badly, it would need removing ideally to inspect & resolve, having a spare new o-ring to fit.
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  4. tomyoud
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    tomyoud New Member

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    [Jan 9, 2014]
    It doesn't look damaged....it's just a metal pipe. Do you know if you can just order a single o-ring for it?
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  5. NHN
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    NHN Retrofitter - Audi - VW - Skoda - Seat Site Sponsor VCDS Map User

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    [Jan 9, 2014]
    Yes you can.
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