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1939 U engine questions blowing oil

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Tully123
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PostPosted: Sat Jan 05, 2019 4:46 pm    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

Well, I got it started again today and had it running for about 15 minutes with the radiator partially blocked. I noticed the oil leaking out of the fill cap was white so I shut it down.

The oil in the case was white and milky. This is telling me head gasket or cracked coolant passage. Anything else it could be?

Looks like I will be pulling it apart for sure now.

Thanks
 
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larry Mi
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PostPosted: Sun Jan 06, 2019 1:38 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

It could be your water pump seal after setting all those years.
 
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JOCCO
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PostPosted: Sun Jan 06, 2019 7:37 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

Oil and coolant could be mixing there are numerous tests for that. Did you get all the water condensation out of it after setting?
 
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rustred
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PostPosted: Sun Jan 06, 2019 8:53 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

did you drain the old oil and have new oil in it before starting? kinda the first thing is to crack the drain plug at least to check for water.
 
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Tully123
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PostPosted: Sun Jan 06, 2019 9:32 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

After noticing the problem I drained the oil and water from the case. I will rinse it with MMO soon.

Before starting the tractor I drained what little oil was in the case, cleaned the sludge from the bottom and the screen for the oil pump pick up and rinsed the case as much as I could with MMO. The case was as clean as it could be. I filled it with fresh clean oil. The oil that turned white had about an hour run time on it. I am new to tractors but not totally wet behind the ears Wink
Thanks for the replies.
 
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JOCCO
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PostPosted: Sun Jan 06, 2019 11:24 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

Tully let me know if you need any help on testing for issues of leaks.
 
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rustred
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PostPosted: Sun Jan 06, 2019 1:28 pm    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

ok, very good.if the original oil was black and dirty then u possibly have a leaky water pump. also has the tractor been sitting with anti freeze in it or a dry block. im thinking dry.then when u added coolant it found its way past a dry seal.
 
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Tully123
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PostPosted: Sun Jan 06, 2019 5:24 pm    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

Jocco, Thank you for the offer. I will take all the help I can get.

Rustred, The tractor sat dry, which i thought was probably a good thing, but it sounds like that may have caused some seal issues.

The help and ideas are truly appreciated.
Thank you.
 
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JOCCO
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PostPosted: Mon Jan 07, 2019 6:10 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote

Tully do some research online but 1. you can make or buy a fitting for the radiator. Take cap off make sure its full, use old inner tube and valve stem and attach with hose clamp. Put some air presser to it (not a lot a few pounds) See if coolant is going in the base etc. 2. Take old spark plug and put air fitting in it put in cylinder make sure valves are closed add air. If radiator bubbles, well not good. You can test your valves and cylinder leak down on this one too. If air comes out the intake you have bad intake valve. Hope this gives you an basic idea of course there is a lot more to it. AND THOSE U'S HAD 2 ENGINES a straight block and a split block.
 
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Howard H.
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PostPosted: Mon Jan 07, 2019 7:51 am    Post subject: Re: 1939 U engine questions blowing oil Reply to specific post Reply with quote



Did you have a chance to mess with your tractor over the weekend??

I'm curious if running it hard helped any.

Also, what did the air breather look like?? I've found engines with not so much as a drop of oil in the bath, which can give an indication of the sort of treatment it had.



Howard
 
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