its probably your crush washers...they go bad all the time because they are so friggin delicate. I hate that oil feed line from the head anyways. If you have some cash lying around I would suggest you go out and buy a stainless steel turbo feed line that gets oil straight from the oil filter housing. That way you are not pulling cruddy oil from the head to feed your turbo and in doing so it will prolongue the life of your turbo and fix any leak problem. If you want to make a kit yourself all you need to buy is a 4AN line I think it is and a 90 degree elbow from slow boy racing. If you want you can also buy the kit from them too...its like 50 bucks...well worth it. Than all you have to do is plug up the hole from the head and not even worry about it.