If the hose is just hanging it will leak oil due to the blow by pressure.
Sorry, am not familiar enough with the 19J turbo version to know exactly where the hose goes and have only worked on one and that was to remove it to fit a different engine.
Your 19J could be pressurizing which will cause oil to leak as well.
Commonly there is a PCV system to remove trapped gasses and let fresh air in that relieves the pressure.
One end goes to the air cleaner to let fresh air in while the other end goes to the inlet side of the engine to suck out the air inside the engine and "burn" the acidic gasses that form.
If you don't have a PCV system set up we can schedule a call and I'll be happy to walk you through how to accomplish it.
Hope this helps.
Uncle "Richard" Douglas has a Land Rover with big wheels that never gets stuck... until he breaks something so it won't go. Uncle Douglas always breaks something. - Anna Crowther at the Conclave 2012 (AKA Carburetor Neck)