Background:
The car is a 2.5T and has approx 155,000 miles on it. We have not serviced the PCV since purchasing 4-1/2 years ago at 72,000. I doubt if it was serviced before that. The oil has about 5500 miles on it, I generally change oil (full syn) at 5000 miles so I'm slightly overdue.

Observed:
Getting some milky build up on the dipstick. Coolant level is remaining constant, so I assume the moisture in the crankcase is due to atmospheric humidity in conjunction with inadequate crankcase ventilation performance. It failed both the oil cap jiggle test and the rubber glove finger erection test, so I plan to delve into servicing the PCV.

Questions:
Is it absolutely necessary to remove the intake manifold, or would removing just the throttle body provide adequate access. (I was able to replace the hose that runs from the top of the breather box up to the top of the engine, a few months back, by only removing the throttle body.)

Is there a good list of parts needed for the 2.5 T or is there a complete kit available somewhere?

Is it possible that there are small vacuum orifices, like on the red block intakes, of which the cleaning of said orifices may be all that's needed to get it sucking again? Or would that just be delaying the inevitable?