Where is the actual PCV valve located?

The engine is pushing oil through valve cover gaskets, filling spark plug wells. When I remove the oil filler cap with the engine running, there is a lot of air coming out under pressure. The PCV hose (also called crankcase vent hose by some companies) comes off the side at the top of the rear valve cover and goes to the engine air intake hose just before the throttle body. However, there is nothing coming out of the PCV fitting on the rear valve cover. And the fitting appears to be molded one-piece with the actual valve cover, so there is no place externally for a PCV valve. When I stick a probe into that fitting, I hit nothing except the other side of the valve cover. Does this mean I have to take old the valve cover set and clean something inside it? Why is there no blow-by being released?
Could this actually be an EGR issue?