car overheating help

problems
i know i have a blown head gasket, my fan dont come on when i tried to replace the head gasket took the head off, when i took this one hose going from the pcv valve to the back of the block top to the thermostat housing (black box crankcase something i forgot the name) coolant stated rushing to my oil i could hear it drip down i just wanna make sure the block is not fucked some one plz help