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Thread: A6 won't warm up...

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  1. Re: A6 won't warm up... 
    #11
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    I always find the 3.0tdi warms up quick.....or at least i get heat quickly. I'm not bothered what the gauge reads in the winter as long as i get heat from the vents.

    Ian
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  2. Re: A6 won't warm up... 
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    I find my 3.0l tdi warms up much quicker than my previous 2.0l tdi A6 (both the gauge and from the vents). I'm currently in another A6 2.0l tdi courtesy car and that again is slow to warm up compared to the 3.0.
    From Apr 2017 - now: Oct 2016 (66) Audi A7 3.0 TDI quattro (FL - MY17), 272 ps, Black Edition (Tech pack, Parking Pack, Folding Mirrors), Mythos Black.
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    (Gone) - From Sep 2011 - Oct 2013
    : Sep 2010 Audi A6 C6 S-line Special Ed (Le Mans) 2.0 TDi Manual, Polar Blue./(Gone) - From Sep 2009 - Sep 2011: Sep 2008 Audi A6 C6 S-line 2.0 TDi Auto, Akoya Silver.
     
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  3. Re: A6 won't warm up... 
    #13
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    Quote Originally Posted by pxr5 View Post
    I find my 3.0l tdi warms up much quicker than my previous 2.0l tdi A6 (both the gauge and from the vents). I'm currently in another A6 2.0l tdi courtesy car and that again is slow to warm up compared to the 3.0.
    That's because you are burning fuel at a much higher rate in a 3.0l !!
     
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  4. Re: A6 won't warm up... 
    #14
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    Quote Originally Posted by wildbore View Post
    That's because you are burning fuel at a much higher rate in a 3.0l !!
    Probably. Higher, but not that much higher though. Also the 2.0 revs higher than the 3.0 yet the difference in warm up time is considerable.
    From Apr 2017 - now: Oct 2016 (66) Audi A7 3.0 TDI quattro (FL - MY17), 272 ps, Black Edition (Tech pack, Parking Pack, Folding Mirrors), Mythos Black.
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    Mar 2013 Audi A6 C7 S-line 2.0TDi Manual, Daytona Grey.
    (Gone) - From Sep 2011 - Oct 2013
    : Sep 2010 Audi A6 C6 S-line Special Ed (Le Mans) 2.0 TDi Manual, Polar Blue./(Gone) - From Sep 2009 - Sep 2011: Sep 2008 Audi A6 C6 S-line 2.0 TDi Auto, Akoya Silver.
     
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  5. Re: A6 won't warm up... 
    #15
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    Everyone seems to be moaning about their newer type 2.0tdi cooling system at the moment.. Sounds like its either over complicated, poorly designed, or just over efficient at cooling.

    Ian
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  6. Re: A6 won't warm up... 
    #16
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    The 3.0tdi heats the water up fairly quickly. In my case about 5 or 6 miles in winter to reach the 4 bars or 90C. If you switch the aircon on, the fan operates to improve cooling because the engine is working harder. The fact that the engine cools down when the aircon is turned on points to the thermostat. There are 2 thermostats in the 3.0TDI. If you PM me your email address, I will send you the study guide.
    Audi A7 Dakota Grey, 3.0TDi 2wd, engine CLAB, Gearbox NKP, Comfort seats, parking system advance, advance key, MMI Nav plus, MMI touch, HUD, Mob phone prep high with on-line services, heated sports steering wheel, folding mirrors, garage opener, fine grain ash inlays. 110k miles
    Audi Q5, 3.0TDi Sline Plus engine CDUC, adaptive headlamps, high beam assist, black inlays, advance key, TPMS, parking sys advanced, 45k miles
     
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  7. Re: A6 won't warm up... 
    #17
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    Sorry I meant one "coolant shutoff valve" and "one thermostat" and not 2 thermostats. The shutoff valve remains shut to improve rapid heating. I suspect this valve is stuck open so check its electrical operation, or the thermostat is faulty.

    The air conditioner regulation system only actuates the coolant shut-off valve -N82- in certain air conditioner settings (e.g. in “OFF” mode or if maximum cooling output is required). The engine speed must then be less than 5000 rpm and the coolant temperature less than 95 C.
    t Shutting off the coolant circuit to the air conditioner heat exchanger accelerates warm-up of the engine when the coolant is cold.
    t The coolant shut-off valve -N82- is open when not actuated to permit checking of the electrical function of the valve. This takes place at certain intervals (e.g. brief actuation for approx. 1 second on every 20th engine start).
    Audi A7 Dakota Grey, 3.0TDi 2wd, engine CLAB, Gearbox NKP, Comfort seats, parking system advance, advance key, MMI Nav plus, MMI touch, HUD, Mob phone prep high with on-line services, heated sports steering wheel, folding mirrors, garage opener, fine grain ash inlays. 110k miles
    Audi Q5, 3.0TDi Sline Plus engine CDUC, adaptive headlamps, high beam assist, black inlays, advance key, TPMS, parking sys advanced, 45k miles
     
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  8. Re: A6 won't warm up... 
    #18
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    Should get the following fault code if your coolant shutoff valve is faulty.




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    A6 Black Edition - 2014 - 2.0 TDI Manual
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  9. Re: A6 won't warm up... 
    #19
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    These recent tech based replies are very helpful! Will do a scan and see if it comes up with anything.
     
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