Wanted to loop back with this thread and let folks know that I believe this issue is fixed! I replaced the check valve (it's harder than I thought, important to get a internal snap ring pliers) and took it for a test drive with my manometer set up. It still goes above and generates positive crankcas...

Also, the oil level is back to a normal amount now. I don't think it's the rings causing this cause if I'm at idle, and the car is parked the vacuum remains in crankcase pressure when revving, it's only when boost is active that positive pressure happens.

Hey all, so I'm scheduling an inspection later but I replaced the PCV system including the two hoses and today I had a rear cam seal pop out due to pressure. The car has vacuum at idle but generates crankcase pressure In excess of 2 psi when boosting still. Can a faulty turbo cause this? Like if it'...