PCV "vent tube"
Anything is possible. I know that by adding a catch can, it stopped most of my problems... but I'm not going to look for a breather and just stick it in the factory PCV hole on the drivers side, and get a breather oil fill cap for the pssengers side, and cap off the intake, and breather tube holes and the pcv vent on the back of the passengers side head all together... too many people are doing this with no adverse problems, it will clean up the engine bay some and stop the pcv as a path for oil into the intake completely, probably the only way to realyl stop the problem.
I had a clear filter in the vent tube path for a while, and it stayed clean. The airflow is in the opposite direction, so that tends to keep any splash from getting sucked into the hose.
Under part throttle conditions the red hose flows TB ->
valve cover and the blue sucks it back out.
But considering the WOT case, there you have zero
pressure difference between red and blue (pretty much),
a light vacuum from both points to ouside (lid, filter drop)
and probably a pressurized crankcase from blowby. So it
is possible that both hoses will be in suction and oil mist
can backflow.
I put a cheapo fuel filter in the "red" line as a catch can.
It seems to not have caught anything in a year. But I do
not often go WOT and my motor is still pretty tight. When
I ported my TB, the core I used had a hell of a snail track
from the PCV makeup port and down the throat, though.
So back-flow it did, on whatever the organ donor vehicle
was.
valve cover and the blue sucks it back out.
But considering the WOT case, there you have zero
pressure difference between red and blue (pretty much),
a light vacuum from both points to ouside (lid, filter drop)
and probably a pressurized crankcase from blowby. So it
is possible that both hoses will be in suction and oil mist
can backflow.
I put a cheapo fuel filter in the "red" line as a catch can.
It seems to not have caught anything in a year. But I do
not often go WOT and my motor is still pretty tight. When
I ported my TB, the core I used had a hell of a snail track
from the PCV makeup port and down the throat, though.
So back-flow it did, on whatever the organ donor vehicle
was.
