How Hot Is Too Hot

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  • Jim-ME
    Overdrive
    • Oct 2006
    • 1379

    How Hot Is Too Hot

    I'm about to replace my 170 degree thermostat with a 190 degree thermostat. I run a RN radiator muff in the winter but at what temp should I open the muff up more? Thanks,
    Jim
  • Myron
    Low Range
    • Dec 2006
    • 95

    #2
    Hey Jim,

    I don't know the technical answer to this, but I have a 190 'stat in mine, run with my RN muff all the way buttoned up, and still have trouble getting to temp. Cooper Technica, who built my engine, told me they like to run at about 190.

    Hope this helps,

    Myron

    Comment

    • Jeff Aronson
      Moderator
      • Oct 2006
      • 569

      #3
      Jim,

      I wouldn't run the muff fully closed once the temperature reaches 20, and I'd open it fully above freezing. The engines are slow to warm up, but once they reach temperature, they do hold heat well. That big radiator really does the trick for hot weather but makes a muff handy in colder climes.

      Do you have a working temperature gauge?

      My experience in Maine is that I must swap out the 190 thermostat for a 170 by May.

      Jeff
      Jeff Aronson
      Vinalhaven, ME 04863
      '66 Series II-A SW 88"
      '66 Series II-A HT 88"
      '80 Triumph TR-7 Spider
      '80 Triumph Spitfire
      '66 Corvair Monza Coupe
      http://www.landroverwriter.com

      Comment

      • Jim-ME
        Overdrive
        • Oct 2006
        • 1379

        #4
        Yes I have a temp gauge so I'll make sure it doesn't go above 195 or so before I open the muff and I'll switch back to my 170 in May.
        Jim

        Comment

        • yorker
          Overdrive
          • Nov 2006
          • 1635

          #5
          You might not need to swap it out- just keep an eye on your temp gauge- well you are probably doing that anyway if you are a conscientious driver.
          1965 SIIa 88",1975 Ex-MOD 109/Ambulance, 1989 RRC, blah, blah, blah...

          Land Rover UK Forums

          Comment

          • gudjeon
            5th Gear
            • Oct 2006
            • 613

            #6
            I run a 195 stat all year round in the 2.25. Never had problem with overheating.

            Comment

            • Jeff Aronson
              Moderator
              • Oct 2006
              • 569

              #7
              Great observations! The radiator on my II-A is about 10 years old, and I do have the Mt. Mansfield heater, and I do run my idle VERY low. All might ocnspire to force the changeover in thermostats.

              Jeff
              Jeff Aronson
              Vinalhaven, ME 04863
              '66 Series II-A SW 88"
              '66 Series II-A HT 88"
              '80 Triumph TR-7 Spider
              '80 Triumph Spitfire
              '66 Corvair Monza Coupe
              http://www.landroverwriter.com

              Comment

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