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oil comming from crank case vent tube

L

lanonitus

New User
Can anyone tell me why i have oil coming out of my crank case vent tube? It is an international D239. It just drips when at idle but flows pretty good with more RPM
 
(quoted from post at 19:51:12 08/07/16) It is probably excess blow by.

Is the crankcase vent plugged?

Is it overfilled?
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No it is not plugged has some blow by but not what i would call excessive. It does appear to be over filled, but was not when i checked 2 days ago. Is there any way diesel could be getting into the case, the oil is thin and smells a bit like diesel?
 
I am ivor from UK 40 years ago I used to work at local IH dealer.. I remember a few times there was problems with diesel leaking into sump and the cause was seal leaking in injector pump but only when it was CAV pump and not bosch also when CAV pump was fitted there was lift pump which also needed checking.. what pump is fitted to your tractor.. another check you could make is the heater plug..
 
In the last two years we have had two tractors come in with that problem, a 560. and a 856. Come to find out the breather tube had rubbed a hole in the power steering line and it leaked down the tube.
 
Cannot say for sure on that engine but on many diesels a bad shaft seal in the injector pump can cause fuel getting into the engine and that would cause the problem you have. Or a bad injector can cause that as can a problem with a return line or if it has a machaincail fuel pump it can be bad and be dumping fuel into the crank case. I would not run it till you have drained the oil and changed the oil filter. Fuel in the oil can cause a blown engine or a locked up engine
 
(quoted from post at 12:07:19 08/08/16) Cannot say for sure on that engine but on many diesels a bad shaft seal in the injector pump can cause fuel getting into the engine and that would cause the problem you have. Or a bad injector can cause that as can a problem with a return line or if it has a machaincail fuel pump it can be bad and be dumping fuel into the crank case. I would not run it till you have drained the oil and changed the oil filter. Fuel in the oil can cause a blown engine or a locked up engine
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Thanks for all of your responses, got some things to check out. Starting with an oil change. If it were a bad injector dumping fuel, wouldn't it have a lot of black smoke? The exhaust is pretty normal. It has me stumped for now I will repost if i figure it out, or if you guys figure it out for me. Thanks
 
You can have a bad injector in such a way that cylinder is not firing so you may not have black smoke. Years ago I got an A/C XT190 that was locked up due to a bad drive shaft seal in the Roosomaster injection pump. Had it rebuilt and while waiting for it to be rebuilt I fill the cylinders with turpentine to free it up which it did. Oil had over a gal or diesel fuel in it
 
(quoted from post at 13:51:55 08/08/16) You can have a bad injector in such a way that cylinder is not firing so you may not have black smoke. Years ago I got an A/C XT190 that was locked up due to a bad drive shaft seal in the Roosomaster injection pump. Had it rebuilt and while waiting for it to be rebuilt I fill the cylinders with turpentine to free it up which it did. Oil had over a gal or diesel fuel in it
Click to expand...

I drained the oil today there was more than 3 quarts over what i had put in, obviously diesel. Before i gave my banker (a.k.a wife) the bad news i had the oil tested and it was VERY diluted by fuel. I spoke with the guys at Advanced Diesel in Spokane and they told me the only way to dump that much fuel in the pan, in a short amount of time, was a bad seal on the injector pump. It is the original pump and does not appear to have ever been rebuilt. They told me this is not an uncommon problem, due to the old school o-rings were made to run with old school diesel and the newer low sulpher fuel dries them out and they fail. Its gonna cost 500-750 dollars to have it rebuilt. Bankers not real happy, but what the heck, she will be happy when i finish preparing the site for our new double wide. Again thanks for all the help. I will keep you posted.
 
(quoted from post at 19:56:17 08/09/16)
(quoted from post at 13:51:55 08/08/16) You can have a bad injector in such a way that cylinder is not firing so you may not have black smoke. Years ago I got an A/C XT190 that was locked up due to a bad drive shaft seal in the Roosomaster injection pump. Had it rebuilt and while waiting for it to be rebuilt I fill the cylinders with turpentine to free it up which it did. Oil had over a gal or diesel fuel in it
Click to expand...

I drained the oil today there was more than 3 quarts over what i had put in, obviously diesel. Before i gave my banker (a.k.a wife) the bad news i had the oil tested and it was VERY diluted by fuel. I spoke with the guys at Advanced Diesel in Spokane and they told me the only way to dump that much fuel in the pan, in a short amount of time, was a bad seal on the injector pump. It is the original pump and does not appear to have ever been rebuilt. They told me this is not an uncommon problem, due to the old school o-rings were made to run with old school diesel and the newer low sulpher fuel dries them out and they fail. Its gonna cost 500-750 dollars to have it rebuilt. Bankers not real happy, but what the heck, she will be happy when i finish preparing the site for our new double wide. Again thanks for all the help. I will keep you posted.
Click to expand...

This is why many of us with older diesels add some oil to the fuel for lubricant. I use 2 stroke oil myself.
 
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