j deere model a water in crankcase

joneser350

New User
I have a 1937 jd model a tractor that ran great until I changed the exhaust manifold and I chased the threads and did not know the push rod tubes were there. The tap hit the tube and split it slightly. I did not know this until the crankcase was full of water. I took the head off and replaced the tubes and put it back together and I still have water in the crankcase. It runs fine until you check the oil and it is a milkshake. I re-torqued head yesterday and put water in it and drove it around and the next day the oils was a milkshake. I used felpro head gasket and had the head resurfaced and magnafluxed and valves ground. Made sure the block head surface was perfectly clean. and I sealed the head bolt threads with sealer and used copper gaskets instead of the lead ones. They come with gasket set. Any one got any ideas of what has happened to it? Thanks joneser 350
 
Well if no leak before the adventure with the push rod tube. I would be suspect that the repair didn't take. They hold a fair amount of oil, did the water go down. Is it possible that there was some water left in the crankcase. Head bolt seals?
 
I suspect that you have moisture in the crankcase from the initial leak, about the only
way to be sure is fill the crankcase with diesel fuel, turn over with starter to mix and
drain.

Also pressurize the cooling system and see if you lose pressure, don't need much pressure 4
to 6 pounds
 
(quoted from post at 05:49:40 09/28/20) Well if no leak before the adventure with the push rod tube. I would be suspect that the repair didn't take. They hold a fair amount of oil, did the water go down. Is it possible that there was some water left in the crankcase. Head bolt seals?
I completely cleaned the crankcase and oil return and water jackets before I installed the head I put pipe joint compound on the stud threads it is sticky and I worked it into the threads good.
 
I did pressure test the head when I installed it and I put 5 lbs. of air in it and it did not leak. I made some aluminum plugs with a schrader valve on one of them. It seemed fine
 
Did you put sealer on the tubes when you installed them? You
should also swedge the end with a tapered punch after
installation.
 
I had a friend machine the tools to remove and install the tubes we swedged the ends with the tool and hammer and it seemed like it was very firm and solid but we did not use any sealer. I also noticed that before I re-torqued the head that there was some seepage at the bottom of the head gasket, just enough to get your finger wet. Then I re-torqued the head and we put water in and ran it around a little bit. The next morning I still had seepage around the head gasket so I checked the oil and it was a milkshake. The radiator was still pretty well topped off . Enough coolant some how got in to the crankcase enough to mix it up into a nice milkshake.
 

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