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Discussion Forum

Re: Thermosyphon cooling system

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11-19-2001 22:18:20

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I grew up on A's in so. cntrl. Wash. state. I can't think of any time that they boiled even on hot days in the summer. I think they would run between 180 & 200 deg. if they are working fairly hard. The rad. cap is non pressureized. As long as the cooling system is clean they work pretty well.

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11-20-2001 05:19:23

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 Re: Re: Thermosyphon cooling system in reply to Vern, 11-19-2001 22:18:20  
The thermosyphon works just as well with a pressurized radiator. The Farmall C has thermosyphon and the radiator has a pressure cap. At least mine does.

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Hugh MacKay

11-25-2001 17:14:53

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 Re: Re: Re: Thermosyphon cooling system in reply to Haas, 11-20-2001 05:19:23  
My super A has a thermosyphon system and has a preasure cap on it. It has been working well for years.

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11-20-2001 04:37:42

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 Re: Re: Thermosyphon cooling system in reply to Vern, 11-19-2001 22:18:20  
A lot of the GREEN 2 cyl. tractors used this system sucessfully. The heat of the water/coolant rising, pulled cool water in at the bottom and incendently on 2 cyl's, this was the head, the hottest part. it was cooled first. it took the auto industry till the early 90's to come up with that trick "reverse cooling" putting the cooler coolant in the head first so as to run higher compression and not to have a "knock" from higher compression.A lot of older engines used thermo syphon with sucess, but as horse power increased they went to water pumps, also higher altitudes were a problem as coolant would boil at a lower temp. I think "FORD" came up with the first "pressure" system, could be wrong tho' Geo.

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11-20-2001 08:25:53

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 Re: Re: Re: Thermosyphon cooling system in reply to George, 11-20-2001 04:37:42  
I just had my Super A engine overhauled. It had run since 1948 with the thermosyphon system with no problems. Only thing you ever notice is when it's shut off hot you'll hear it gurgle for a while, I suspect just from the water continuing to circulate. Anyway this made my mechanic nervous and he went through the radiator, (did find a plugged flue which he replaced) and finally he stuck a water pump from a 100 in it. I've seen/heard of this being done before, but I don't like it--it's not original and the pump itself will interfere with the radiator shutter controls once I get that back together. (Mine was originally distillate.) To make a long story short, we've gardened and done odd jobs with the tractor all summer, and I'm probably going to end up changing it back. Also with the pump on I can't hook up the temp gauge so I have NO idea how hot it's running now. What do you all think?


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gene b

11-20-2001 20:11:44

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 Re: Re: Re: Re: Thermosyphon cooling system in reply to Al, 11-20-2001 08:25:53  
there should be a plug in the water pump for the sender most of them do

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11-20-2001 16:52:58

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 Re: Re: Re: Re: Thermosyphon cooling system in reply to Al, 11-20-2001 08:25:53  
Your Super A will last longer than you will with the thermosyphon engine cooling system. Look at how many of them are still going after more than 50 years. And your are right, it will gurgle after you shut it off and that is unsettling to a lot of folks, but does no harm.

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11-20-2001 09:12:04

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 Re: Re: Re: Re: Thermosyphon cooling system in reply to Al, 11-20-2001 08:25:53  
Al, did your mechanic put a thermostat in your SA when he added the waterpump? If not, it will never get up to full operating temperature(which is not good for the engine). If you plan on changing it back, then of course you don't need a thermostat; otherwise, you need to add one - especially if you plan on using your SA this winter.

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11-20-2001 14:19:35

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 Re: Re: Re: Re: Re: Thermosyphon cooling system in reply to Glenn(WV), 11-20-2001 09:12:04  

That's where it gets tricky. There's no thermostat and I was told it doesn't need one. I know what you're thinking and I tend to agree, but I've been told by several long-time IH tech's that this is true. Our winters aren't as severe in NC as in some places.

Nevertheless, I don't like the waterpump. I really don't think the engine will get warm enough. I want to disk and plow once in a while, but mostly it's going to cultivate the garden, run the grain auger, and do odd jobs and parades. I think if there was a problem the engine would have burned up before he added it in the first place, even being "tight" since it was new. I suspect it'll come off before spring, my mechanic saved the old water inlet elbow so I'm in business there.


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