Love that 1st pic Jerry.
How the EGR works on the tdv8 - here's a novice understanding. Exhaust flows up from the left and right turbo to their respective EGR. The EGR has a exhaust cooler to reduce the exhaust temperature which receives coolant to assist the process. Paul posted some good pics a while back of where the exhaust flows through. The EGR opens at start up to assist with warming up the motor and at various other times which I don't understand. Exhaust gets let into the manifold at the top of the motor and combine with clean air from the turbo via the intercooler.
The clean air includes oil vapour. The crank case pressure is released by a vent to the cran case ventilation (CCV) filter located at the top of the motor behind the oil filter. This is supposed to filter out most of the oil and return it to the sump. The filtered vent air is then sent south to the turbo intake. It joins air from the air filter and enters the turbo. The turbo being quite hot should deal with this oil vapour. However it does coat the turbo vanes and the inside of the intercooler.
That's why Harlie was suggesting a secondary ccv filter like a Provent might be a good idea.
Anyway this oil vapour and air go through the turbo and intercooler and into the upper manifold where it combines with exhaust soot and coats the inside of each bank manifold and most goes in the motor. In theory the EGR exhaust gets burnt a second time and produces less pollution.
I hope that makes sense and helps.
