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Runs Hot

Discussion in '1983-2005 S-Series models' started by detailer03, Oct 20, 2003.

  1. detailer03

    detailer03 1/2 ton status

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    I have an 86 that seems to run hot 210 to 220 on the highway and 190 or less in town. New stat, radiator etc. The water pump was replaced about a year or so ago. Any suggestions?
     
  2. Confedneck

    Confedneck 3/4 ton status

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    sounds like an airflow problem..tell me does it have a flex fan??
     
  3. detailer03

    detailer03 1/2 ton status

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    No flex fan, just what came with the truck.
    Should I try a flex fan? What about the fan clutch. If I put on a flex fan, should I use the fan clutch?
     
  4. Triaged

    Triaged 1/2 ton status

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    Your truck (if it is anything like mine /forums/images/graemlins/grin.gif) has a 195deg t-stat, and a sucky gage. My truck runs with the neddle on the 210 all the time and never budges. The lines are spaced so far out it is hard to tell what temp you are at...Has it always run that temp?

    I have a 3-row brass radiator and can drive in 100deg temps all day with the AC on and it is always at what the gage says is 210.
     
  5. detailer03

    detailer03 1/2 ton status

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    It just started doing it. I was thinking maybe the sender is bad. Yeah, the gauges suck. All electric. I am going to do a backflush. Maybe there is some junk in the water jackets.
     

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