I got my 94 cummins daily driver with 174.000 miles with built tranny 100 fuel plate colair intake and 4 inch straight pipe also have lock up switch. But anyways it's been leaking a litte oil and I couldn't really figure out from where until the other day opened the hood and there was oil all over the injection pump. So I took the dipstick out and started it up. Nothing came out until I brought the Rpms up. It leaked enought to run off my hand. Has anyone had this problem and why is it blowing up the dipstick tube? It's making a huge mess. And how do I fix it? Is the motor junk? Please help!!!!

 

Sounds like lots of crankcase pressure. possible cause is excessive blowby. Also check your oil level to make sure youre not "making oil". That is, malfunctioning injector(s) shooting too much fuel, washing passed the rings and diluting the oil, thus raising the level. And make sure your crankcase vent tube isnt kinked or plugged. Just tossing out a few.....

 

Do you do alot of idleing? if so you may have bad ring causing excessive blow by, but check what Bigg Redd said to..

 

Your supposed to have a seal on the dipstick so it can't leak. mine does the exact same thing couldn't figure it out till one day I did n found the dipstick had no seal on it. Fixed that n my oil leak stopped. I had slight steam coming out of the crank case on a cold morning n that was it so I know it's not plugged and the breather tube was dry so it's not blowby on mine atleast.

 

The oil level is always a little low. And I tryed a new seal on did stick it just leaks by it. My dip stick Handel is broke on both my cummins. The breather tube is not clogged I took it off and drover around with no tube a little steam comes out but when it's war nothing comes out not even a drop of oil. Should I swap out the motor I have a 96 12 valve will that bolt to my 94 tranny? Also everyone says put a filer in the valve cover should I try that or am I wasting time with this motor?

 

Im gonna guess that you have quite a bit of blowby smoke comming out of the crankcase vent tube? If thats the case, well then an engine swap is probably in the works in the near future.

 

So my 96 will bolt up to the 94 tranny?

 

Yep..........

 

And will perform better too. I'd get a compression test first though. If it had blowby you should have oil coming out crank case breather too.

 

Agreed...........