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Thread: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week

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  1. Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
    #1
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    I don't know what to do, had the car in for pressure testing over some hours but they diden't find any leak, not even traces of leaks.
    But i need to fill 1 liter once a week with coolant / water.

    I googled little about this problem and found a post about cracked sylinder head? then water goes into head etc, i don't know if that problem is on mine tho, it goes well, starts well
    i read about white smoke, i took a video of my car, maybe you guys can see if this is normal smoke on a car that is not warm yet and the temperature outside is about 15 ish.

    Video of my care on idle:
    A6 c6 4f 2007 sedan 2.0 tdi idle - YouTube

    regards Stian
    -Car: Audi A6 C6 4F 2.0 TDI 2007 SEDAN Black

    -Stian
     
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  2. Re: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
    #2
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    Try replacing the coolant bottle cap.
    Dan
    2009/2010 2.0 TDIe SE
     
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  3. Re: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
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    I hear sound of little pressure letting out when i screw off the lid
    So it can't be the lid or could it anyway?

    If lid, how does 1 liter a week dissapear ?. steaming out of the lid?, then should'nt it be a trace after leakage?

    -Stian
    -Car: Audi A6 C6 4F 2.0 TDI 2007 SEDAN Black

    -Stian
     
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  4. Re: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
    #4
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    According to my opinion, the coolant is intering into cylinder seen these steam coming out. It is not so cold to make the steam. Behind the head, the coolant can get into cylinders through EGR cooler and oil cooler as well.

    Sent from my LG-D802 using Tapatalk
    Audi A6 Sedan C6 2.0 TDIe 2011 Condor Grey metallic
     
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  5. Re: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
    #5
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    How does the underside of the oil filler cap look? Nice clean normal oil, or thick like black mayonnaise? If the latter then your coolant could be leaking into the oil and you'll be in for a very expensive repair if you don't catch it in time.
    2007 A6 Allroad 3.2 FSI Tiptronic (C6 4f pre-facelift) - left hand drive with X1D build sticker code
     
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  6. Re: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
    #6
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    Exactly the same problem on my car. I had it to the audi garage and the result is the head gasket or a crack on the block engine.


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  7. Re: Audi A6 C6 4F 2007 SEDAN 2.0 TDI - Using coolant / leaking coolant = 1 Liter a week 
    #7
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    2008 Audi A6 2.0 TDI Head gasket problem - YouTube


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