So I have had an issue of burning oil while driving my car for awhile. It started last spring when I took the car out from storage. I had replaced the valve cover gasket because I had oil leaking into the plug wells.

Oil has been leaking off the head and onto the headers where it burns and leaves a nice black smoke trail.

My uncle suggested that it was a crankcase ventilation issue most likley and not the new gasket. I tried driving around for awhile with the oil fill cap turned loose and a rag over it to keep the cap from falling off. The burning oil stops.....

So today I check through all the hoses for blocks and to my disappointment I find nothing... Its all totally clear.

Part 4 does not exist, I just have 1 and 3, the hose connects to part 16 in the next picture.





The other hose from part 16 runs into one of the lower hose barbs in the throttle body.



These parts are all clear and I can blow and suck air from the intake through the hose going to the throttle body.

When I remove the oil fill cap from the valve cover I can blow and suck air through the hose feeding into the valve cover (parts 1 and 3).

The disturbing part is that when I run and rev the engine with my finger over the hose from the valve cover I don't feel pressure building as I expected. There is a vacuum present that increases with rpm... When I feel the hose going to throttle body I expected to find a vacuum, only to find no vacuum nor pressure. The passage is not blocked I can still suck air out of it, and I can blow air into it and start to stall the engine.

Honestly, why couldn't there just be some oily mess clogging one of the hoses that I could clean out. Would that really be to easy?

So my questions are.....
-why is having a vacuum pushing oil out past the valve cover seals?
-why does the totally unblocked ventilation system not prevent this but loosening the fill cap does?
-where is vacuum coming from, intake valves not seating?

on a second note I just made it over 200,000 Mi ! so i suppose a valve job could be in order but the oil and ventilation just confuses me.

I also just ran a compression test and every cylinder scored A+ ~250psi all round!

Any ideas guys?

Thanks,
Tyler