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Water temp gauge

Discussion in 'Kenworth Forum' started by RKingdon, Nov 19, 2014.

  1. Nov 19, 2014 #1
    RKingdon

    RKingdon Bobtail Member

    1
    0
    Nov 19, 2014
    Edmonton, Alberta
    0
    Hello hello, I need a bit if knowledge here guys!! I drive a 2005 W900B Kenworth w/isx530. My h2o gauge drops to below 100 deg when idling at 900 or driving with no weight on! But when I idle it high (13-1400rpm... I work in northern Canada) my gauge climbs to operating temp usually about 170-180degrees, or when I load my tanker it operates normally.
    Now my query is... Why? Why does it drop to the bottom of the gauge? Is my gauge starting to go? Is it a sensor in the engine? Could it be my thermostat? Should I be concerned! It seems to be running fine! Pls get back to me ASAP!!
     
    RKingdon, Nov 19, 2014
    RKingdon, Nov 19, 2014
    #1
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  3. Nov 19, 2014 #2
    FuzzFace2

    FuzzFace2 Medium Load Member

    417
    137
    Jul 27, 2014
    Angier, N.C.
    0
    I don’t know about the big truck diesels but the LD 6.2 chevy I had did the same thing. If I started it from over night and let it idle for an hour it would not get up to normal temp only if I drove it and that was with the grille covered 100%.
    I chalk it up to not working or loading the engine so it will not make any heat. If you have an exh. gas temp gauge you can see this, as soon as you put a load on the engine the EGT goes up.
    My truck also would not build any boost (Gail Banks turbo kit) till it was under load also, I had both boost & EG temp gauges installed.
    Dave ----
     
    FuzzFace2, Nov 19, 2014
    FuzzFace2, Nov 19, 2014
    #2
  4. Nov 19, 2014 #3
    zinita17601

    zinita17601 Road Train Member

    1,274
    1,519
    Aug 19, 2010
    lancaster pa
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    Thermostat stuck open
     
    zinita17601, Nov 19, 2014
    zinita17601, Nov 19, 2014
    #3
  5. Nov 19, 2014 #4
    KW Cajun

    KW Cajun Road Train Member

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    3,652
    Apr 12, 2013
    Copperhead Road
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    I agree with zinita ↑ ↑ ↑ ↑ ↑ , but also first verify your actual coolant temps by running (idling, parked, radiator cap off) with a simple probe thermometer, which you can get at any auto parts or heating/air supply store. Test your coolant temp in the radiator at idle and then at 1500 or so rpm.

    What's the ambient air temp of where you're presently at, and driving thru?
     
    KW Cajun, Nov 19, 2014
    KW Cajun, Nov 19, 2014
    #4
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