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Farmall c overheating

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jason r

02-17-2002 14:45:22




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i just bought a 1950 c. it runs very well w/ no smoke good oil pressure. it has 2 problems. i can run it for about 10 minutes and it overheats and dies. i have taken the radiator off and cleaned it out. i have also flushed out the block. the block does have a crack on the outside clutch side right in the middle. it is about 4 inches long going horizontally right where the angled and flat part of the engine meet.it has not been fixed. i do not have water in the oil and it does not affect the running. after all of the things i did to the tractor would the crack be causing the tractor to overheat? it is a thermosyphon system w/ no thermostat or water pump. when i do fix the block should i jbweld it or should i have it welded as i don't have the money to buy a replacement block. thanks for the help

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Old Hand

02-18-2002 13:13:56




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 Re: Farmall c overheating in reply to jason r, 02-17-2002 14:45:22  
I am probaly missing something but if I understsnd you temperature is perfectly normal. If you had run tractor for 20 mintutes the day it left factory water in top of radiator would have been warm if not hot. Just my 2 cents.



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Jim

02-18-2002 07:35:14




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 Re: Farmall c overheating in reply to jason r, 02-17-2002 14:45:22  
My guess is that someone put a head gasket for a tractor with a water pump. If you haven't seen a water pump type head gasket they have restricter holes in the water passages.



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Haas

02-17-2002 17:15:12




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 Re: Farmall c overheating in reply to jason r, 02-17-2002 14:45:22  
The crack should have nothing to do with overheating as long as you have sufficient water level in the cooling system. The way you describe the water temp with warm, not overly hot water at the top of the radiator sounds pretty normal. Maybe the engine dies because of the coil or some other problem. When you flushed it out, you should take off the radiator and the two necks bolted to the head and block. Then use a tube to reach back in as far as you can to flush it out. A pressure washer would be good. I would recommend having the crack in the block welded. This is a common problem and probably happened because someone let if freeze. I agree with Michael that incorrect timing might be causing the overheating. A friend had a Super C that was overheating like that, and I found the timing to be way off. So far off that I had a hard time finding the TDC mark on the flywheel. The tractor ran surprizingly good for as far off as the timing was. The symptoms were overheating and rapid fouling of the plugs.

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Michael Soldan

02-17-2002 15:52:03




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 Re: Farmall c overheating in reply to jason r, 02-17-2002 14:45:22  
Jason, I can't think that a crack would be related to over heating. Many will suggest you drill a tiny hole at each end of the crack to stop it from growing longer. Good welding shops, using cast welding rods can weld that crack up permanently. I would go that route. I have seen tractors heat up when the timing is off. You didn't mention the block in terms of any work you did, is there a build up of corrosion and lime in the water jackets? Also can you see flow in the rad when the tractor is running? Have you changed the oil since you got it...fresh oil=less friction and a cooler running engine..keep us in touch..Mike in Exeter Ontario

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jason r

02-17-2002 16:20:53




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 Re: Re: Farmall c overheating in reply to Michael Soldan, 02-17-2002 15:52:03  
thanks mike for the reply....i didn't change the oil as of yet and i didn't mess with the block itself. i did run water through the engine without the radiator on it and it came out pretty clean. the radiator was clean as well after i flushed them out.. there was a significant ammount of rust and gunk in the bottom water pipe. after i posted i went out and filled it back up with water and ran it at 3/4 throttle for about twenty minutes and the water at the top of the rad was hot but not hot enough to burn my finger (kinda like a good hot shower). the tractor runs really nice and smooth so i don't think it is the timing it is just wierd why it over heats like it does. it reminded me of my old john deere a. the water would steam and the radiator would be hot but it would not boil. is there anything i can put into the system to break up any lime or rust in the engine or should i just keep going the way i am?

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gene b

02-17-2002 18:32:03




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 Re: Re: Re: Farmall c overheating in reply to jason r, 02-17-2002 16:20:53  
yes block off the bottom outlet and fill the block with miratic acid that will loosen op all kinds of scale in the block



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Haas

02-18-2002 07:01:45




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 Re: Re: Re: Re: Farmall c overheating in reply to gene b, 02-17-2002 18:32:03  
Phosphoric acid would be a better rust scale remover.



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gene b

02-18-2002 19:11:23




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 Re: Re: Re: Re: Re: Farmall c overheating in reply to Haas, 02-18-2002 07:01:45  
dont know several guys i know have used the muratic stuff and they are happy seen the castings and it looks realy great to me gene b



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