My Diesel Let me down!

[smithy010]

Hi All,

I was on my way 600km to Narrandera from sydney, when my old girl let me down last night.

I got 100km down the road, and she started running on, and overheating.

I stopped at pheasants nest, topped up the oil, let her cool down, checked the air filter (the manifold had a lot of oil in it, as expected).

I carried on for 20k's (after calling aydan), and she started doing it again. I tried taking the air filter out, but that only created a ****load of smoke because the air filter housing was leaking oil onto the exhaust manifold. So i stopped, rang the old man and said i wouldn't be home that night.
I decide i would limp her home, so i made a catch can (may as well not have).

My car went through 4L of oil (poured it on the ground) on the way back home.

Now i'm trying to diagnose what's wrong. What i don't understand is, why all of a sudden am i having all this blowby?
Have i cracked a ring or something?

Or have i done a valve seal or something like that?