if it clogs up, you will end up pressurizing the valve cover and blowing out the valve cover gasket. Ask me how I know.
Continued pressurization could potentially result in an enormous high speed oil leak as the engine basically forces motor oil past the gasket. Like a quart or 2 every hundred miles. The leak could potentially be so bad that you might have motor oil run down your tail pipe and splash up onto your rear window and trunk while on the highway. Again, ask me how I know.
