2H PCV valve

they normally don't have one just a hose from one to the other.
On the standard engine it goes uphill to the inlet to help stop it.
If you have excessive blowby you have two choices, pull the engine down and fix it or plug the hole in the inlet and let the hose from the rocker cover just hang down the side of the engine and vent to atmosphere.
If it is still connected as at present and the blowby is really bad you may find that you are unable to stop the engine in an extreme situation as it will run on the oil being sucked in from the crankcase.
Another symptom is that when you lift off going down a steep hill the engine may reach a point in the rev range where it will accelerate rather than hold back on compression.

Shane, run an "oil breather tank" beween the rocker cover and the turbo inlet. The oil breather tank allows the oil mist to condense in the tank, the condensed oil drops to the bottom of the tank and the tank is then vented at the top back to the inlet side of the turbo. The oil crud can be monitored in the tank and when it's too full can be disposed of. Most doof doof ricers run them on their turbo petrol cars to solve exactly the same problem.
Regards Andrew.

2H is normally aspirated. Do you have an aftermarket turbo?

12H-T is factory turbo and commonly has oil travel the blowby pipe. I had the same problem with a HJ61, and bent the pipe up a bit so the oil had to travel uphill. Seemed to help. The rocker cover has a rubber gasket inside the top section which deteriorates with time.

Cheers
Phil