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Overheating at a stable 220F?

Discussion in 'The Garage' started by bettabruce, Mar 16, 2007.

  1. bettabruce

    bettabruce Registered Member

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    My 1975 K5 is running at 220 all the time.

    I've replaced the thermostat and had radiatior recored.

    Is 220 acceptible temp in 75 degree ambient weather?

    I have a pretty much stock 350.

    Thanks in advance for input.
     
  2. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    nope , a hair over thermostat temp shouldn't be a problem in agood cooling system .

    Look the system over again . Maybe a fan clutch or something is working right , provided you have already made sure you have no leaks .

    BTW , when was the last time it was flushed , and does it have coolant or straight water ?
     
  3. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Have you determined that the temp guage is accurate? The factory guages are notorious for being hard to trust (especially after 32 years.)

    Rene
     
  4. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    I always overlook the easy stuff , as I fixed those things years ago when I bought my Blazer .

    Yup Renes correct , verify the gauge first and foremost .
     
  5. mr.smartass

    mr.smartass 1 ton status Premium Member

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    Do you have a fan shroud, or body lift? Guess it could be alot of things but... you get one of these :woot: for being from MS! (nothing says cool quite like the "cabbage patch")
     
  6. littlejimmythatcould

    littlejimmythatcould 1/2 ton status

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    What size thermostat are you running? I run a 190 and my truck likes to hang out around 210 or so when it gets hot, and it's only a year or so old.
     
  7. TexasBlazerBoy

    TexasBlazerBoy 1/2 ton status

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    Yup........:o
     
  8. bettabruce

    bettabruce Registered Member

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    problem solved

    turns out that my aftermarket SunPro gauge has let me down.

    It reads 120 when the engine is cold, so it must be escalating the

    reading a good 20 to 50 degrees. Thanks for all the ideas.
     
  9. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Buy the best guage (Autometer) and don't look back.
     

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