If the oil return was loose woulkd this cause a problem ? theres no leaks ive checked gona drop the oil on my return from the states change the turbo again ,no oil lights coming up or cel lights it has to be a blockage somewhere on the oil feed ,the pipes have been checked ,just wondereing if there is a gauze on the pipe coming off the head that is blocked ive heard allsorts of rumors when doing an engine flush apart from this problem the car runs sweet just killing turbos this will be the 4th one !!!!!