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Thermo siphon system

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Mark Poss

Well-known Member
I started a couple of tractors today that don't have water pumps and the radiators were steaming after a short time. Could the antifreeze and water separated over the winter causing a block and not letting the system circulate? Thanks,Mark
 
Mine and most I've been around, you have to take them down the road or work them with shutters closed to even get them up to 170. Not an antifreeze problem IMO.
 
It doesn't take long for a thermosyphon system to show some steam coming out of the filler neck with the cap off. The heated water from the engine rises pretty quick.
 
"Steaming", as in the coolant was actually boiling, or "steaming" on a cool humid day when any heat or vapor rising is easily seen?
 
I do not know the real answer to your question. IF the antifreeze goes into solution and is dissolved in solution with the water, I'd say no it cannot separate. IF it is like oil and water, where they remain separate fluids, then they stay separated. My suspicion is they dissolve into each other, and cannot separate, other-wise it would be a heck of nation-wide problem every winter. Stuff'd be freezing all over the country.
 
You're a little short on information....what did the temp gauges show....unless they're pegged out over 212 degrees I don't see how it would be possible to have steam out the filler necks especially if you have antifreeze in the tractor...the boiling rate would be closer to 250 degrees...maybe you're seeing some vapor...what was the temp outside when you started....personally if they are full of fluid...I wouldn't even give it a second thought...
 
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