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Thread: A4 b8 2.0tdi 105kW problem with coolant temperature

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  1. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #21
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    Temperature drops only when heating is set to 26.5°C no matter how I drive. It happens when car is stationary on idle and when I drive. Also it takes more time (and distance about 15 kilometers this morning, outter temp was about 0°C) for temp gauge to get on 90°C but when heating isn't set to high coolant temp is cemented on 90. Major problem is solved by thermostat change and that was most important for me because heating is working well again. This is now a minor problem which not affects heating or other vital functions and maybe I should not touch anything. tHAT RETURN VALVE can wait to be changed if he is a problem at all.
     
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  2. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #22
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    Temperature drop is normal on all diesel engines. Most of the time I turn on inner air circulation, engine warms up quicker and temperature does not drop too much.
    AUDI A4 B8 2.0TDI 2010 100kW CAGB
     
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  3. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #23
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    In my car, now when outside temp is -10°C and when AC heating is turned off, engine temp. comes to 90°C after 8km, if AC heating is at HIGH the engine temp. reaches max 70°C if RPM is below 2000, if on highway the 90°C reaches after 16km. Which part could be defective in these conditions?
    AUDI A4 B8 2.0TDI 2010 100kW CAGB
     
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  4. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #24
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    hi, do you have manual or automatic gearbox ? I have same problem with seat exeo tdi caha engine..
     
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  5. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #25
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    Manual.
    AUDI A4 B8 2.0TDI 2010 100kW CAGB
     
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  6. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #26
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    I don't see a problem with whats happening guys

    using the recirculation button will just lead to steamy windows
    VW POLO 2002 1.2 12v , Audi A6 2006 2.0 TDi SE , Skoda Fabia 1.4 TDi

    All 3 cars in the current fleet
     
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  7. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #27
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    thank you, i try to find it
     
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  8. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
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    I have the same problem on audi a4 b8 2012 (facelift). I buy 3 years old car.
    I change thermostats (both) and sensors (both).

    on the odometer shows always the same temperature (on the 1 post.)
    then I look odometers on the ebay and on the car (audi a4 2003) and a6 2009.
    the position of the temperature (cold engine) start at 50 C.
    but on my, is lower then 50. so I decide to repair the odometer and set temperature index finger to 50.

    when I drive, the temperature on the odometer is now ok (90 C)
    stevc.jpg
     
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  9. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #29
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    So under engine ecu with vcds, temp is also 90?
    A48K5 2008 Retrofits: FL Taillights, Bixenon, Color Cluster & FL S5 Cluster, ADS with button, MMI 3G & 3G+(With Street view) Other Stuff: Ecu tune, Front bumper valance "Rieger look", Sideskirts, VCDS mod, Interior leds, Basic sound to Audi SS + B/O sub/tweeters+activsub, Soundproofing,Tinted windows, Interior 6D carbon wrap, Painted calipers, 18" Wsp wheels Peeler style, FL gearknob, Efficiency prog via cluster & gateway flash...
     
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  10. Re: A4 b8 2.0tdi 105kW problem with coolant temperature 
    #30
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    Quote Originally Posted by Gunnark100 View Post
    So under engine ecu with vcds, temp is also 90?
    Right, ECU and gauge value must match.
    AUDI A4 B8 2.0TDI 2010 100kW CAGB
     
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