Laidong 4L22D Engine Thermostat

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    • November 10, 2012 at 4:59 pm #30686
      CTOA
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        Greetings everyone.

         

        I have a Laidong 4L22D Engine in a 16kw generator. I figured I would ask a question here as I see this type of engine is also used in some tractors. 

        When in use, the temperature barely hits 100 degrees Fahrenheit. When under a load, it will creep up to about 110. I assumed the thermostat was stuck open so I drained the system down and pulled the thermostat. Upon looking it over it said it was a 50 degree Celsius thermostat, which turns out to be about 122 degrees Fahrenheit.

         

        This seems a little low to me. Shouldn't it be around 180 or so to promote better combustion and engine life? If so, anyone know where I can get a 180 degree thermostat?

         

        Thanks! 

        CTOA - Founder

      • June 6, 2014 at 5:36 pm #37036
        35xtd
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          my dozer has the 4l22-ta it runs around

          100 degress too i thought that was to low but bob from nortrac says thats what it suppose to run

          35xtd Dozer and hoe..1610d yanmar tractor

        • June 7, 2014 at 2:11 am #37037
          Bob Rooks
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            Hate to disagree with “Bob from Nortrac”, apparently he doesn't understand thermal efficiency and the dangers of running an engine cold.

            I installed a 180° thermostat in my dozer with the TY395 engine and I could tell the difference in sound and performance. My fuel consumption went down, and my engine oil life improved. I currently have 260+ hours on the oil and it's still perfect according to the analysis.

            My background knowledge is from being a licensed diesel engineer for many years.

            Account deleted.

          • June 7, 2014 at 8:53 am #37038
            Tinbender
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              What is a 100F thermostat anyway, another word for gasket?

            • June 7, 2014 at 11:41 am #37039
              Bob Rooks
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                roflmaoroflmaoroflmao

                 

                MisterPat,

                Without seeing your thermostat, it's impossible to guess. I would take it to NAPA or any good auto supply house and have them physically match it up.

                Account deleted.

              • June 9, 2014 at 11:06 am #37043
                DavidPrivett
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                  143 degrees f is the coolest thermostat I ever heard of was for a gas burning pleasurecraft engine I thing they put the operating temp that low was to save the raw water exhaust manifolds and elbows.

                • June 9, 2014 at 11:30 am #37045
                  Bob Rooks
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                    That is correct David. In old raw water cooled marine engines. There was something magic that happened to salt water and cast iron when it reached 150°F. The cast iron turned black and began to disappear.

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