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John Deere Tractors Discussion Forum
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Engine problems with 1951 B

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PeterE

11-15-2005 15:44:56




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I've got a late styled B that I just bought this year. It had been running fine, although I haven't used it much.

The last time I started it, fluid started running out of the belt pulley (it looked/smelled like gasoline) and oil was coming out of the stack (black smoke, oil droplets all over the hood).

I'm guessing that this is something like a head gasket, but I thought I'd see of anyone had some advice.

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HaveA1951BAlso

11-16-2005 20:18:02




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 15:44:56  
I would just change the oil & filter and then not worry. When I first bought my 1951 B, I change the oil & filter because it had lots of gas in the oil. It suffered no ill effects. Then, I changed the transmission oil and refilled it through the plug behind the crankcase pipe filler on top of the tractor. Yep, put six gallons of GL-1 140wt in the crankcase without knowing it. Started it up and it smoked blue and then oil ran out of the pulley. Thought I ruined everything. But, these old John Deere tractors are tough. I changed everything again, but did it right this time. Tractor continues to run good three years later and does not have a leak anywhere.

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DickD

11-16-2005 14:52:43




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 15:44:56  
A word to the wise. If the cylinders are so full the engine wont crank, and you must remove the plugs,MAKE SURE the plug wires are removed from the mag so the wires don't ignite the gas running out of the cylinders along the frame where the wires are hanging. At 12 years old, I caught our big grainery on fire by not taking this precaution.



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Josh in Indiana

11-15-2005 22:07:58




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 15:44:56  
Peter, Been there done that, still plowin. LOL. Its not the first time thats been done on an old JD. The bright side is that now you have the cleanest crank case at the next show :)

Good Luck,
Josh in Indiana



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old

11-15-2005 16:39:25




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 15:44:56  
Bet you left the gas turned on didn't you?? Waht has happened and its common is the float didn't close all the way and gas has filled you crank case. So now you have X number of gallions of gas in your oil and if run now you blow your engine up so to speak. Change the oil and when you park it shut the gas off. Also change the oil filter since it will also be full of gas/oil mix.



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PeterE

11-15-2005 16:48:39




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 Re: Engine problems with 1951 B in reply to old, 11-15-2005 16:39:25  
Well, I let my brother put it away so I'll blame him!

I don't recall if the gas was on, but it is likely. I did open the petcocks before I started it, and about a quart of gasoline drained out.

My only question is, would that also account for the oil in the exhaust? I understand how the gas in the crankcase could be flooding out of the pulley, but I'm not sure how that puts the oil into the exhaust.

Or maybe I'm just missing something, I've been at work a long time today.

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old

11-15-2005 17:21:11




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 16:48:39  
The oil in the exhaust was really a mix of gas and oil so it was very thin and was just passing by the rings and out the pipe. I hope you didn't run it very long that way because if you di you could have done a lot of harm to the engine.



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PeterE

11-15-2005 18:42:28




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 Re: Engine problems with 1951 B in reply to old, 11-15-2005 17:21:11  
Just driving it from one barn to the next when we noticed it. A few minutes. I hope I didn"t do too much damage.

Thanks for the help.



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old

11-15-2005 18:45:18




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 18:42:28  
Your probably ok but I wouldn't run it again till you have changed the oil and then make sure you turn the gas off.



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Steve Smith

11-15-2005 16:00:29




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 Re: Engine problems with 1951 B in reply to PeterE, 11-15-2005 15:44:56  
Sounds like you have gas in your oil. If your float valve in the carb stuck, you could have a bunch of gas in the crank case. Check the oil level and drain and refill if it has been diluted with gas.



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Walt in Jaxn Tn.

11-16-2005 19:15:40




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 Re: Engine problems with 1951 B in reply to Steve Smith, 11-15-2005 16:00:29  
I want to know what kind of plugs you used that didn't foul? Must be some pretty good ones! --Walt--



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PeterE

11-16-2005 19:27:56




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 Re: Engine problems with 1951 B in reply to Walt in Jaxn Tn., 11-16-2005 19:15:40  
Foul?? The #$%*&#! thing wouldn't stop running!

Wouldn't respond to shutting off the gas (probably due to all the gas/oil blowing past the rings), wouldn't die with full choke, finally put her in 6th while holding the brakes.



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farmallkidinpa

11-17-2005 08:41:27




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 Re: Engine problems with 1951 B in reply to PeterE, 11-16-2005 19:27:56  
dont worry bout hurtin those old deere motors i ran a 41 B about 10 mile to a pull pulled it 2 times(got a 2nd in 3500) drove it to my shop(10-15 miles) then a week later drove to the same pull grounds and back and when i changed oil i realized it had gas in it. i took the motor apart and wasnt a single thing wrong with it.



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