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Thread: Engine temperature display on my 2019 R1250RT Nav 6 is very erratic

  1. #1
    Registered User cereed0419's Avatar
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    Engine temperature display on my 2019 R1250RT Nav 6 is very erratic

    Hi All. The Nav 6 allows you to see several engine parameters of which one is engine temperature. Iíve noticed that you can be cruising and it usually reads 180 to 185 degrees but on some occasions it will fluctuate up and down from 170 to 195 in just 30 seconds or so. When I see this fluctuation on the Nav 6 the dash does not fluctuate. Typically it stays between 6 or 7 bars when cruising. Any idea if this is a resistance issue with the temperature gauge or perhaps a shield missing on the temperature sensor allowing wind to radically change the temperature reading or just a defect in the Nav 6?

    Thanks, Craig

  2. #2
    Ignore it as long as the long-term results make you happy.

    Too much technology and detail will only make you crazy. The human brain far exceeds the ability of common sensors, so use it as a guide, a grain of salt, and not the gospel. Or, you can drive yourself crazy. Your choice.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  3. #3
    It sounds like the Nav 6 is somehow tapping into a date source that feeds instantaneous engine coolant temperature. Whereas your dash gauge is displaying an averaged temp (i.e. averaged over a set period of time, not instantaneous.) An averaged reading is much more meaningful.

  4. #4
    Registered User RIDERR1150GSADV's Avatar
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    I have noticed this as well, but it seems to stabilize to the actual temperature after 20-30 mins when everything is nicely warmed up..
    Don't know why but this has been my observation so far... YMMV
    MOA # 108516
    Current ride 2018 R1200 GSA Triple Black
    Past rides '04 R1150RT, '05 K1200LT, '06 R1150GSA, Ď17 R1200RT

  5. #5
    Watch This!!! junkjohn's Avatar
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    Could just be the thermostat open and close like it should.
    John Simonds
    2017 R 1200 GS Adventure
    1975 Norton Commando 850 Roadster Mk 3
    If it ain't broke, fix it 'till it is.

  6. #6
    Registered User stooie's Avatar
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    Quote Originally Posted by junkjohn View Post
    Could just be the thermostat open and close like it should.
    I think John is right on. My two previous bikes had digital coolant temp displays and the temperature would move around a bit.

    On those bikes it was more worrisome to me because the VFR800 typically would cycle as high as 220 and the FJR hardly ever got up to its nominal thermostat temp of 185. In both cases the dealers claimed and other owners concurred that "they all do that". I, too, suspect that car manufactures and others put in the averaging function on the display to keep owners calm.
    Bob Stewart
    Salem, OR

    2018 RT

  7. #7
    Debbie's Servant Lee's Avatar
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    Quote Originally Posted by cereed0419 View Post
    Hi All. The Nav 6 allows you to see several engine parameters of which one is engine temperature. Iíve noticed that you can be cruising and it usually reads 180 to 185 degrees but on some occasions it will fluctuate up and down from 170 to 195 in just 30 seconds or so. When I see this fluctuation on the Nav 6 the dash does not fluctuate. Typically it stays between 6 or 7 bars when cruising. Any idea if this is a resistance issue with the temperature gauge or perhaps a shield missing on the temperature sensor allowing wind to radically change the temperature reading or just a defect in the Nav 6?

    Thanks, Craig
    On our R1200RS bikes the coolant temperature will jump up and down like that in cold weather.
    When it's warm or hot out the coolant temp does not change as much.
    The coolant temp on our dash reads the same as the Nav V.
    Lee
    2016 R1200RS
    MOA # 30878
    Past BMW Bikes: 2011 K1300S, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  8. #8
    Registered User cereed0419's Avatar
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    Thanks to all. Very good information.

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