I was putting a new turbo oil feed line in today and noticed this.... Our oil feed line goes into a brass block, brass block is then pushed into our block?? This block has 2 taps for 2 lines. I have looked in my TTA supplement and it states : 1. is the oil feed line into turbo and 2. is for oil pressure switch. I looked at my GN and that is how it is. NOW my car has the brass block but 1 tap is plugged and my oil pressure switch is below my oil filter. Could this be why I am blowing turbos..???? I know my car has been apart numerous times and I really do not believe the motor was put back together properly by the previous owner. Thanks for any replies.