yea as above andy - the oil in the sump/crankcase gives off vapours when warm / hot - it has to be vented. along with vapours from the top end [under the cam cover] usually to a oil catch tank in the kit car world. the OE way was to vent it back into the air intake tract to be reburnt. if its not getting vented it just sits on the oil and eventually goes white. also when fitting vent hoses make sure ALL hoses have only an up down fitment so gasses will rise up inside them. the tank should be at the highest point so any oil that does make it there can drain back down to the sump once the engine stops.. if poss..
get it finished man.. thats 2 stoneleighs youv missed..
are you going andy? if so we iz going down prob saturday night or sunday morning.. maybe the latter weather dependant