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'49 8N
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My First Tractor - Advice Needed

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Tom Ballard

01-27-2001 11:59:58




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Greetings,

Just this past week, I bought a 49 8N. Runs like a champ. When going over the engine, I noticed some milky residue in the oil filler tube. I understand from reading some of the posts on this board that it's most likely caused by water in the oil, but couldn't find the solution in any of the posts. Any advice?

It doesn't smoke, but after warming it up and running it for about 1/2 hour in 25 degree temperatures at high rpm in second gear (just testing it), I noticed a small amount of oil leaking from the bottom of two panels located immediately below the exhaust manifold on the right side of the block. What's behind these panels and is gasket replacement for them relatively easy?

The oil is black, but dirty. I'll change it this week. Rear end seems tight. Gear lube looks good. Hydraulics are smooth and steady.

There's a small hole in the manifold that causes a spitting/tapping sound. Sounds like a valve, but pretty sure it isn't. I wiped all the grime off the block and noticed the carbon buildup on it where the hole in the manifold is allowing exhaust to be directed at the block. Are there any tricks or tips for replacing the manifold?

This is a great board. There are many people here with extensive knowledge that share it willingly. What a wonderful world this would be if everyone were as willing to lend a hand.

Thanks in advance for any assistance.

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Ed Crabb

07-26-2002 14:03:03




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 Re: '49 8N - My First Tractor - Advice Needed in reply to Tom Ballard, 01-27-2001 11:59:58  
Dont even think about trying to patch the manifold. Once they blow through and leak, the metal becomes so thin in the area themost expeareinced welder cant get a good weld. The replacement runs $65.00 gaskets are about $2.00. The tapet cover gaskets can be replaced while you have the manifold of,and cost about $10.00 each., the condensation is normal, but a check of the radiator to see what color the coolant is is a good idea. These 8N;s are know for blowing a head gasket after twenty or so years of running. You can do a compression check on all four cylnders and find out if the gasket is shot. If you get two adjacent cylnders that have lower pressure by quite a bit than the others, its a good bet that the gasket has blown between the cylnders, if you just get one cylendar with low pressure, it probaly bew out into the water jacket. This aslo would explain the gucky stuf in the tube as well.

Hope this helped!

Ed

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Tom Ballard

01-28-2001 14:27:02




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 Re: '49 8N - My First Tractor - Advice Needed in reply to Tom Ballard, 01-27-2001 11:59:58  
I was plowing snow today with my new '49 8N and had problems with the hitch hitting the tire. ie., if the blade was tilted to cast snow to the left, the right link on the hitch would hit the right tire. There are no chains on the tractor to keep this from happening- should there be? If so, where and how are they connected?

Thank you.

Tom Ballard



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Arthur Brestlin

01-27-2001 14:20:20




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 Re: '49 8N - My First Tractor - Advice Needed in reply to Tom Ballard, 01-27-2001 11:59:58  
One of the nicest things about vintage tractors is the people who own and use them.This discussion board is maybe the best example of that! My '48 8N also has that fill tube pudding. In addition, it also has grayish antifreeze in the radiator. I have been told that it indicates either a faulty head gasket or worse, a cracked block.Oil mixing with water & water mixing with oil causes this. One of these days I will replace my head gasket and hope it takes care of both problems. You might check your coolant to see if oil appears to be present. This all sounds terrible, but my tractor has been running and working this way since I bought it in '92. It's just not that big of a deal! These tractors are amazing in how well they work under less than perfect repair. Sorry for the wordy post, good luck with your tractor, stay tuned to this board and don't forget to give your tractor a name.
Arthur

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Fast Ed Ohio

01-27-2001 13:27:16




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 Re: '49 8N - My First Tractor - Advice Needed in reply to Tom Ballard, 01-27-2001 11:59:58  
Tom,First thing,get a shop manual for N tractors. You wont regret it. That milky residue is fairly common,caused by condensation,I understand a thermostat will help, by increasing engine temp. and thus help evaporation of condensation.Those two panels on the right side of your engine are valve covers,gaskets cheep and easy to replace.It souns like you might have to replace your exhaust manifold , I replaced mine last year, No problem.I would use cadium nuts so they wont rust.

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John C. (IN) USE BRASS NUTS ON MANIFOLD...

01-27-2001 21:56:37




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 Re: Re: '49 8N - My First Tractor - Advice Needed in reply to Fast Ed Ohio, 01-27-2001 13:27:16  
...So they strip before the studs strip or break.
Original equipment was brass nuts. When they sieze on the studs from the manifold heat, they often strip on removal, and once you remove the manifold, you use a dental pick or somesuch to "unwind" the brass threads off of the studs without damaging the studs.
If you use steel nuts on the manifold, you run the risk of breaking the studs off when the nuts sieze to the studs.
...and the hot manifold will often make steel nuts sieze to the studs.

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JimNc

01-27-2001 12:57:05




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 Re: '49 8N - My First Tractor - Advice Needed in reply to Tom Ballard, 01-27-2001 11:59:58  
Welcome,
The two plates you referred to are the valve tappet covers. The valves, springs and all related parts are behind them, yes gasket replacment will stop the leak and is also simple. Buy a new manifold and gaskets, probably be cheaper in the long run.
HTH Jim



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Snowplow

01-27-2001 12:29:03




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 Re: '49 8N - My First Tractor - Advice Needed in reply to Tom Ballard, 01-27-2001 11:59:58  
Welcome to the wonderful world of antique tractors. This board is your best friend. Visit often!

The milky residue around the oil filler tube is normal. It is evaporated condensation that forms inside the pan. Unless it gets real heavy don't worry about it. If you have water in the oil (milky white) then you may have other issues.

Your oil will seemingly always be dirty. I can change mine and it will darken within a few uses. I guess a 50+ year old machine is allowed... especially if a resent switch has been made to detergent motor oil, which you should use. I use the same 10W-30 I put in my truck. Regular gas (87) and you don't need to add lead, although I doubt it would hurt, might even help.

You can patch the manifold. Not my area. I would post it separatly and more specifically. A new one is available.

I didn't really understand the discription of your oil leak. It is also important to know how much leaks.

Good luck!

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bri9n

01-27-2001 19:02:17




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 Re: Re: '49 8N - My First Tractor - Advice Needed in reply to Snowplow, 01-27-2001 12:29:03  
whew! thats a relief...i just got my tractor running and was getting concerned about how quickly the oil darkened after an oil change...Brian.



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Rod Mi

01-28-2001 10:16:09




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 Re: Re: Re: '49 8N - My First Tractor - Advice Needed in reply to bri9n, 01-27-2001 19:02:17  
Oil will get black rather quickly because of the detergents in the oil. carrying the contaminates away!!



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