Weird noise when shutting down the 1945 John Deere B

Beatles65 · Jan 12, 2011

I was able to get the tractor going this after noon and was able to clear the rest of the driveway. When I got done with that I shut off the gas to let it all burn out and it started to make a weird grinding noise so I killed the engine as fast as I could by pulling the throttle back.
What could that noise have been?
I did notice that from the left cylinder petcock that it was dripping a milky substance. Take a look at the picture.
Do I have a leaky head gasket?
Any help would be great!
Thanks!
From Nebraska,
Andrew Kean.

rick deere · Jan 12, 2011

If you started it at freezing temp, you could have a broken oil coupler, which is not good news,if it sounded like a squilling type noise. you might have spun a rod bearing.Was it turnable after it stopped.You shouldnt start a john deere 2 cyclinder if they have any moisture in the oil in cold temps.and most deeres draw moisture a some point.Now if its stored inside its a differant story, but they can still draw moisture but not likely to freeze and break the coupler.

Dalex · Jan 12, 2011

Drain the oil , and fill the radiator. leave the drain plug out , and see if it continues to drip water. I believe your engine has push rod tubes , and they may be leaking , or the head gasket is leaking , or you may just have alot of condensation. I can't explain the noise ....

PJH · Jan 12, 2011

Andrew - this broken oil coupler that Rick mentioned can be seen by removing the inspection cover behind the governor housing, on top of the crankcase. You can see the vertical oil pump drive and the coupler is a hollow square piece that connects to the drive.

I broke one on a "B" about like yours, but I happened to notice no oil pressure and shut it off immediately. It's easy to fix if there's no other damage, but the noise you mentioned doesn't sound good.

Good luck,
Paul

Beatles65 · Jan 12, 2011

Yes I was able to still turn the engine over after I shut it down. I was able to run the tractor for about 30 Munites pushing snow so I dont think that I broke the oil coupler.

Mike M · Jan 12, 2011

Did your oil pressure gauge show oil pressure ?
And does the gauge work ? If Yes and Yes then the coupler should be fine.

Bob · Jan 12, 2011

"I did notice that from the left cylinder petcock that it was dripping a milky substance. Take a look at the picture.
Do I have a leaky head gasket?"

NO, you have a slightly leaky petcock which is about par for the course for the old tractor and has NO effect on the operation of the tractor.

gtx1967jewison · Jan 12, 2011

please explain how you spin a babbit rod bearing? NOT.

rick deere · Jan 13, 2011

If you run a engine with no oil pressure you will spin something somewere, might even be a main bearing, why dont you try it and let us know which one it was.

teddy52food · Jan 13, 2011

But where is that milky stuff coming from?

Weird noise when shutting down the 1945 John Deere B

Beatles65

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rick deere

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Dalex

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PJH

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Beatles65

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Mike M

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Bob

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gtx1967jewison

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rick deere

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teddy52food

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