Excessive crankcase pressure?

[dhirocz]

Got a bunch of stuff done to the truck this weekend. And I was feeling good too!

I had a fairly oily spot underneath and around the breather when I was working on the truck this weekend. I figured it was crankcase vapor blowing back onto the engine. I washed it all off, thinking I'd keep an eye on it.

Today I go to check my trans cooler during my post trip and find it all oily again. At first it looked like it was coming from behind the compressor, but upon closer inspection, it looks almost as if oil is being forced out from under the valve cover and is running down the head, though it seems oilier on the driver's side.

It's already been @m*m^2'ed and it has the new crankcase breather with an extra hole drilled into it. Im cringing here, but it seems like the crankcase is pressurizing because of blowby. At 730k, it might be getting close to that time. It's only been running @m*m^2 now for 45k. Still seems to run fine, however.

Have I overlooked something? I figured it was maybe the front structure, but with oil on the back and sides of the head running down from the valve cover, I would think blowby first...