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truck runs hot

Discussion in 'Trucks [ Eighteen Wheelers ]' started by fredrd, May 6, 2013.

  1. May 6, 2013 #1
    fredrd

    fredrd Light Load Member

    153
    8
    May 10, 2012
    0
    on my 2005 int with a 466 truck runs hot and clutch fan doesnt seem to engage when it should. city temp has been ok..but highway she climbs to 230. at start off clutch fan will engage, and it only seems to engage when the ac is on and the temp hits 230 and the fan brings it back down to 210...any ideas? water pump replaced, radiator cleaned out and cooling system flushed
     
    fredrd, May 6, 2013
    fredrd, May 6, 2013
    #1
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  3. May 6, 2013 #2
    Licensed to kill

    Licensed to kill Heavy Load Member

    830
    2,434
    Dec 31, 2010
    Alberta
    0
    Take an infrared temp gun and shoot the thermostat housing to confirm that the gauge is, in fact, reading correctly.
     
    Licensed to kill, May 6, 2013
    Licensed to kill, May 6, 2013
    #2
  4. May 6, 2013 #3
    Heavyd

    Heavyd Road Train Member

    7,761
    6,201
    Feb 4, 2009
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    Are you getting any Check engine or Engine Warning lights? If the ECM is seeing coolant overtemp it will derate the engine and throw on the "Warn Eng" light.
     
    Heavyd, May 6, 2013
    Heavyd, May 6, 2013
    #3
  5. May 6, 2013 #4
    slowpoker

    slowpoker Light Load Member

    71
    26
    May 23, 2011
    new braunfels,tx
    0
    Bad sensor.
     
    slowpoker, May 6, 2013
    slowpoker, May 6, 2013
    #4
  7. May 6, 2013 #5
    freightlinerman

    freightlinerman Road Train Member

    1,287
    536
    Mar 4, 2011
    Florida
    0
    If that was true, over 220 degrees you would have blown your liner o-rings and would have rebuilt the engine. I think 220 degrees F is the shut down temperature. DO NOT OVER HEAT a 466! You will kill it in a heart beat. Good news, they are cheap and easy to rebuild.
     
    freightlinerman, May 6, 2013
    freightlinerman, May 6, 2013
    #5
  8. May 6, 2013 #6
    fredrd

    fredrd Light Load Member

    153
    8
    May 10, 2012
    0
    I get the orange engine light frequently, a quick burp of the throttle shuts it off, and them the same cycle happens again, after a few minutes, don't know if it has to do with the temp or other issues. What type of sensor could be bad? I was thinking the gauge could be wrong but I don't know for sure. This has been happening for a year now. If I lower my speed (getting off the highway) gauge reads lower, around 200
     
    fredrd, May 6, 2013
    fredrd, May 6, 2013
    #6
  9. May 6, 2013 #7
    Heavyd

    Heavyd Road Train Member

    7,761
    6,201
    Feb 4, 2009
    0
    Even though the rad has been cleaned out, check the fins to make sure they aren't separating from the cooling tubes.
     
    Heavyd, May 6, 2013
    Heavyd, May 6, 2013
    #7
  10. May 8, 2013 #8
    fredrd

    fredrd Light Load Member

    153
    8
    May 10, 2012
    0
    Truck seems to only get hot hot runnin at 75 mph.. Up to 55 it runs normal.. At least that what gauge reads
     
    fredrd, May 8, 2013
    fredrd, May 8, 2013
    #8
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