PhillyQuest

Can you tell me why i would have oil being forced back through the oil drip hose that is connected to the canistor next to the air filter and goign into the valve cover....I an getting oil coming up through there like a fauset. Any ideas, i heard of krankcase pressure but what do i do. For right now i plugged the oil drip hose and added a little air filter on the valve cover and elliminatesd the canistor. What do you think? Oh and it's a rebuild engine, new turbo, and bottom and top rebuilt. :-[