runs a remote filter/ oil cooler so no modine, engine is fresh build having been bored decked longstudded etc etc i no the block as my old engine , so other than a long stud drilling being done wrong cant think of what else it could be with the block, head was supplied by a dealer so i dont no history of it but its had a skim and looked fresh, defo no gasket blow been checked,

this has black oil in header , water system flushed 4 times still puts oil up
oil in engine all milky flushed 4 ++ times

looks like its all gotta come out again!!, just asking if the head could course such a problem??