My truck is making oil!

Hi and thank you for helping,

We’re a one vehicle RV family that just moved from Pa to Az. Had injectors, Hpop, IPR, CPS, etc, done in Pa. Truck got us here. Yay! But now. Hoping the truck isn't toast.

1.5 months ago, I started noticing more exhaust smell. Entering the cabin while sitting with a/c on. Smelled like fuel.

Truck running okay. Calculated fuel milage around this time, ok.

2 weeks ago, started to see significant exhaust smoke. Light color, I think. Truck running ok still. I just happened to check my oil and find its way higher than the dipstick mark. (Normally about 3 gal oil, I later pulled an extra gallon out). Not milky. Seems like diesel fuel intrusion to me.

Fuel bowl clear. Fuel filter nice paper color. Clean.

Coolant clear. Later pulled 4 gal out. Did not see fuel or oil.

Was advised (forums) that it could be injector O-rings. I bought 8 O-ring kits and changed. Thought I would find a damaged O-ring. All looked good to the eye.

Then the forum says, oh, sometimes injectors fail inside, and they don’t fully turn off. Take injectors to the shop for a test.



I wanted to get compression numbers so decided to try that now. First step, turn over starter to blow out cylinders through glow plug holes. PFFFT! Coolant flies out of #5 glow plug hole. Pull injector and I see water dripping from the brass cup into the cylinder hole. (I'm wondering if the cups are very weak, and did it just now crack due to injector work? Do I have another original problem?)

(Brass cups a known issue on the 7.3L around 300,000 miles)



Thats when I drained the radiator. I can now key cycle the starter and I see the glow plug holes huff n puff just like in videos. They kind of blew mist and then it got clear air. But #5 and 7 seem to have always mist. Put paper towel over glow plug holes and it is not water (seems diesel to me). Compression on #5/7 is way high, like oil is in there. 5/7 are like 480/515psi (higher than new truck).