I appear to have hit this too.
Car set p0171 code. Initial research said burst disk and to replace valve cover. Burst disk was sucking air so replaced cover. Test drive was good for a few miles, then code came on again. Open hood and find oil all over passenger side. Pulled new valve cover to find gasket split on that side.
Further research then brought me to the large pcv threads here. My check valve appears to be missing from the intake. Could that have caused my initial issue with the burst disk AND the blown gasket on my replacement cover (or did I do a bad install)?
I thought I could run with the missing check valve - but knowing that would eventually cause another burst disk failure. Apparently I was wrong about that? Do I NEED to fix the intake at this point before risking another valve cover (or some other gasket some place else)?
Check out the two links I posted above. Those will explain everything.
If your check valve is gone, you will consume oil (which may lead to piston damage) and you will continue blowing check valves. You NEED to fix that check valve by either installing my kit or spending 2x as much buying a new intake manifold.
http://www.cruzetalk.com/forum/34-g...urbo-intake-manifold-pcv-check-valve-fix.html
Yes, that missing check valve caused your initial issue and the blown gasket, because with that being gone, you are pressurizing the crankcase and pushing oil past seals. Your oil pan seal is also seeping if you go look at it, and probably your CPASV seals on the side of the engine, maybe even your rear main seal.
Get this fixed as soon as you can.