[A26B]

Originally Posted by Belsy

Key ?? being: does the large buildup of oil resting in the inj. hsg. come before the pcv function or after the system has dumped it back thru the intake process in to the hsgs.??

The oil laden vapor from the crankcase flows first from
(1) the cylinder heads and the crankcase ventilation box under the plenum, into the injector housings,
(2) then from the injector housings through the grommets & pipes on outside of each inj hsng, to the PCV valve lower hose at the rear of the engine, then
(3) up through the PCV's,
(4) then through the 1/4" line on the LH side of the plenum, then
(5) back into the plenum
(6) and finally back into the combustion process through the intake runner.

So, the oil inside the injector housings occurs first, before the PCV's.

Once it's in the plenum, it goes only to combustion as a direct shot through the inj hsngs to the cylinder heads & valves.