743b cooling question

[richfrazier]

hi.. I have a 1991 bobcat 743b with the Kubota diesel in it. I tested the antifreeze yesterday and it tested to -10 and its been getting close to that at night around here.Today I drained out a gallon and put in a new gallon of antifreeze(strait antifreeze not the mixed stuff). I ran it for a long time to try and circulate it in but I don't think I'm getting hot enough to open the thermostat. Any tips? I tried covering the radiator like on a car with little effect. Ran it for about a hour but its only about 10 degrees out and the temp guage isn't getting past the middle of the dial. I can feel heat off of the top hose but not on the bottom hose thanx for your help!

 

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diesels run cool. you need to work the machine to get it get generate some good heat. just idling does not do much.

 

[farmshop]

diesels run cool. you need to work the machine to get it get generate some good heat. just idling does not do much.

I would think you will be fine. Most systems circulate a small amount even if thermostat isn’t open. Your coolant that tests -10 won’t freeze solid at that most ratings are slush points. If you are worried an engine block heater would keep it thawed

 

[Tazza]

I would think you will be fine. Most systems circulate a small amount even if thermostat isn’t open. Your coolant that tests -10 won’t freeze solid at that most ratings are slush points. If you are worried an engine block heater would keep it thawed

I;m with farmshop here too, there is a small hole in the thermostat, it will have allowed some coolant to still move, so it did mix, maybe not as well as you had hoped, but i think it should be ok.