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Old 07-05-2008, 09:28 AM   #1
taillight
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Ford 8N tractor

I'm going to start working on a ford 8N tractor and was hoping someone would have some insight into this problem. There is oil in the coolent but not coolent in the oil. Is there a gasket that could leak oil under pressure into the coolent or am I looking for a crack? Thank You
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Old 07-05-2008, 04:19 PM   #2
rhandwor
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Re: Ford 8N tractor

Is this a diesel or a gasoline engine on this tractor. You have both coolant and oil in the head. If you pull the head take to a machine shop for a pressure test. Then check the head gasket closely. I would stop at a machine shop that does tractor motors. They can give you some good information before you start. Use a flashlight and inspect the outside very closely for a gasket leak. Do you have white smoke indicating coolant in the cylinder. Try using a pressure tester on the radiator when running. A pulsating gage will indicate a head gasket problem.
Do some more looking and asking at a machine shop before dismantling. Thats all they work on is engine problems and usually will be a big help.
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Old 07-06-2008, 09:13 AM   #3
taillight
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Re: Ford 8N tractor

It is a gas engine with a flat head so no oil goes to the head. Built in 1948. No white smoke
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Old 07-06-2008, 04:31 PM   #4
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Re: Ford 8N tractor

Did this tractor freeze up over the winter look for a crack between small welch plugs.
I looked at a tractor forum I have used for a John Deere B for Ford 8N they indicated a leaking head gasket.
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Old 07-06-2008, 10:37 PM   #5
taillight
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Re: Ford 8N tractor

Is there a tractor form like this one? Thank You










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Old 07-07-2008, 09:01 AM   #6
rhandwor
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Re: Ford 8N tractor

Do a yahoo search for Ford 8N Tractor.
They have sites selling complete rebuild kits pistons sleeves and gaskets for $295.00. One site has pictures of a complete tear down and rebuild. Some have various questions and answers. I've haven't found any like this.
I still think your best is ask a machine shop which does tractor work.
There section with pictures is very helpful. They list all kinds of parts.
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Old 07-07-2008, 04:04 PM   #7
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Re: Ford 8N tractor

Quote:
Originally Posted by taillight
Is there a tractor form like this one? Thank You
I have a couple of older tractors and love working on them. There are still many thousands of Ford 8N models around so parts and support is very good. Both my farming neighbours have the 8N.

Here are two good sites that I visit.
http://ytmag.com/
http://www.mytractorforum.com/

BTW if your block is no good, you can install a flathead Ford V8 in the tractor. It bolts directly in place of the 4 cyl, (which is just one-half of the V8 anyways.)
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Old 07-08-2008, 09:14 AM   #8
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Re: Ford 8N tractor

An 8N with oil in the water is definitely a crack. There's no other way. Oil pressure overrides water pressure. "Drain back" can't generate the pressure needed to override water pressure. The oil gallery that runs the length of the block may have a crack to a water passage. Sleeving the gallery is a known "fix". Blocks are getting harder to find, but you WILL find them, the further East you go, the easier they are to find. We "do" an average of about 3 8Ns and a couple 9Ns a year.

"Pressure testing" the block is a way of finding the problem, but it will need to be completely disassembled and cleaned first. Your local machine shop with tractor experience is exactly correct, per MR.

Jim
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Old 07-13-2008, 02:02 AM   #9
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Re: Ford 8N tractor

Taillight,
Google Ford 8n, go to Smith's 8n tractor page. They have a link to a forum. Info for the 8n is plentifull good luck.
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