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Thermostat ?

Discussion in '1982-Present GM Diesel' started by BurbLover, Dec 22, 2004.

  1. BurbLover

    BurbLover 1/2 ton status

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    Last night while plowing with my K5, I couldn't get heat. Engine never got over 150. Thinking the thermostat stuck open, I replaced it with a 190 one. Now, It wants to run around 200-215. Is this okay or should I go to the 170 thermostat? Thanks.
     
  2. imiceman44

    imiceman44 1 ton status

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    If you're plowing and you are in the 200-215 and not going beyond 230 at the worst, you are fine.
    The engine is most efficent around the 200-210.
    So if it can stay in that range you're good.
    Just keep watching it.
     
  3. BurbLover

    BurbLover 1/2 ton status

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    Thanks. I've been watching that guage almost as much as the road:D
     
  4. elacruze

    elacruze 1/2 ton status

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    Verify that your gauge is correct with an external thermometer. Either the gauge or the sending unit might be reading high. I just installed a new 195* t-stat in mine yesterday for the same reason-my gauge reads between 195-200 now as it should.
     
  5. FWP

    FWP CRS

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    It's not uncommon, from what I've researched, for the factory gage to be inaccurate. Mine's off by 15-20 deg, based on the aftermarket gage I have in the crossover pipe.
     

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