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diagnosis help please

Discussion in 'A3/S3 Forum (8L Chassis)' started by chazza55, Nov 23, 2013.

  1. chazza55
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    chazza55 got an S3 8L: living the dream

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    [Nov 23, 2013]
    Hello all,

    So took the s3 out today and after turning out of the driveway got the red coolant level warning on the DIS. So I turned right back and we took the OH's car out instead.

    - Just checked the fault codes......none.

    - Checked the coolant level......it is indeed running quite low.....but there is still coolant in the system.

    - Checked for signs of leakage and find a single hose with salmon pink (whitish G12++ colour) scum around the ends, but not soaking wet. (see pic below)

    - Checked dipstick, coolant resevoir and oil filler cap - no mayo present.

    So do people have any suggestions? Do you think this is just a leak or something more serious?

    I should add i have been getting smoke on start up that disappears after about a mile......nothing on full boost so i had assumed this to be valve stem guides/seals that i was going to start looking into getting sorted.

    Any input would be much appreciated.......pic below:

    20131123_163744.jpg
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  3. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Nov 23, 2013]
    These cars rarely pop a head gasket but its not unheard of for the heads to crack... maybe worth having a hydrocarbons and pressure test on the coolant system to be sure all is good...

    G12 is quite searching and will find the smallest crack to leak from... the plastics (like you have pictured) do split and leak... I have replaced the housing on the head, the one you have pictured and the one a little further along from that one too due to them falling apart... not expensive, around a tenner each IIRC..

    <tuffty/>
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  4. epox
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    epox Active Member

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    [Nov 23, 2013]
    would replace the clip, topup and see how it goes
    mark
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  5. chazza55
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    chazza55 got an S3 8L: living the dream

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    [Nov 23, 2013]
    Tuffty: ah ok so you think it may be that it is the plastic that has cracked and is leaking rather than just a general leak from the hose. A possibility I guess.

    Mark: I was certainly going to top up but do you know if these clips have a history of relaxing?......it think the plastics & hose are worth an inspection so may as well do the clip anyway.

    As for the colour of the scum......can we deduce anything from this? There it is a sort of creamy pink......is this just the way G12 goes when it leaks or do you think this would indicate presence of oil.........as noted there was no mayo found anywhere.

    Where is the best place to get hydrocarbons checks does Tuffty? Would any vag specialist do that sort of thing or is it available only at certain places?

    Thanks for your thoughts...
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  6. epox
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    epox Active Member

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    [Nov 23, 2013]
    looks like you have leaks at both sides of the hose so not sure about cracks.
    mark
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