Oil loss at the turbo

So about 4 weeks ago had oil loss –> Cyclone oil separator built in thought that it was because of it, still has oil loss. Was today in the workshop – said the turbo is broken because there oil leaks out there. But the turbo is almost new only 17000km in it. So it can be that by the old oil separator the pipes to the turbo can possibly be damaged? Since this has never been changed. Can it be that the new one is already in ass. Hope you have tips for me? Many Dabk