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Allis Chalmers Discussion Forum
Show Parts for Model:

milky oil in engine

Author  [Modern View]
amo

11-30-2013 15:48:04
75.91.81.149



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I have a 1954 model B Allis and the engine oil is turning milky. I understand this is from water from radiator. How and what to do first? What is a good stop leak to use, Thanks Amo




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Hayrack

12-05-2013 03:04:31
64.33.240.237



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 Re: milky oil in engine in reply to amo, 11-30-2013 15:48:04  
I am with Lonnie... Milky oil isn't always from a leak. Those old girls will condense a ton in cold weather! I had a guy that fed cattle with a WD... and brought it to me with no oil pressure one winter. Milky oil froze up in the pan. I tore it down and started to overhaul it and in the mean time he put his WD45 on the feedwagon. About a week later he called me and said that now the WD45 had milky oil too. I went over to his place to check it out and we changed the oil and filter. I hung around while he did chores to see if any antifreeze showed up in the new oil. Well, I found out he would shut the tractor off every time he stopped... it never ran more than 5 minutes at a shot and then would cool off for a half hr while he was loading. He was worried about using too much gas. I told him to start it and leave it run the whole time. No more water in the oil after that. We finished the overhaul on the WD anyway but I suspect to this day it never needed it.

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NoNewParts

12-01-2013 07:55:31
67.240.141.151



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 Re: milky oil in engine in reply to amo, 11-30-2013 15:48:04  
guys pretty much have you covered.

just like to add that in addition to those places listed,

I've come across 2 AC's that had a head crack just above/in the pushrod channel.



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old

11-30-2013 20:46:55
209.86.226.11



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 Re: milky oil in engine in reply to amo, 11-30-2013 15:48:04  
The B is a wet sleeve engine so water/coolant in the oil and be from a number of things.
#1 if you do not run it much condensation.
#2 blown head gasket
#3 sleeve seal o-rings.
To find out which you need to drain the oil. Make sure the coolant is full and drop the oil pan. Let it sit that way for say 2 days and watch for coolant under it



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soundguy

11-30-2013 17:36:59
207.30.46.70



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 Re: milky oil in engine in reply to amo, 11-30-2013 15:48:04  
1, forget, forever, about rad stop leak.

2, determine source of water.

you may be looking at a head gasket or freeze plug. if lucky.

post back



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Ted in NE-OH

11-30-2013 16:52:50
65.25.30.63



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 Re: milky oil in engine in reply to amo, 11-30-2013 15:48:04  
There are 3 freeze plugs in the top of the engine head just below the rocker shaft. Take the valve cover off and inspect. They sometimes rust through or get a pin hole. This is the easiest thing to check and fix as they just push in. Could also be head gasket. The first thing I would do is change the oil once run it an hour and change the oil again and then wait to see if it happens again. Could be just condensation.

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steve(ill)

12-01-2013 06:38:40
50.40.149.193



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 Re: milky oil in engine in reply to Ted in NE-OH, 11-30-2013 16:52:50  
Drain the oil as mentioned and leave the drain plug out. Refill the radiator and see if it continues to drip out the bottom after an hour or two. Step two is to take off the hood and vavle cover and see what the freeze plugs under the rocker arm look like. After that, you might consider a sealer if it is head gasket or sleeve o-rings. I have had good luck with a half bottle of BARS Copper gasket sealer.

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Lonnie Smith

11-30-2013 16:08:08
209.212.44.144



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 Re: milky oil in engine in reply to amo, 11-30-2013 15:48:04  
Are you sure it's from the radiator? If it was outside it could be from rain or maybe condensation. You could change the oil and run it to see what happens, how long it takes to turn milky, if it does. If it is antifreeze it could be the O-rings on the piston sleeves, a bad frost plug in the head or a crack somewhere.



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