Liquid oil in the exhaust.... and other oddities

[maytag]

Originally Posted by 911monty

Ok so just thinking here and it's later than clock indicates.... I referred to the AOS in the basic term as a pressure regulator which is correct, it is attempting to regulate the crankcase pressure at idle to about neg 4.4" wc. Since the plug is missing on bank 2, the AOS "sees" this as positive pressure in the crankcase and opens in an attempt to draw it down. Since it can't with the hole open then AOS is fully open and ingesting massive quantities of oil to the intake tract. Might be worth getting all plugs back in place and test run.

EDIT: The correct term for the AOS is a diaphragm operated back-pressure regulator.

Okay, I like this working theory (thanks, by the way). The only question it leaves unanswered for me immediately, is probably born from not having a full-scope view of the AOS system in it's entirety: if it's wide-open, as you've postulated, why is it ingesting oil and not air? Do I have a drain-back that's blocked somewhere, keeping the "intake" of the AOS fed with oil?

Originally Posted by 911monty

So to clarify, the left (bank 2?) cam plugs have been blown out and the scavenge pump is possibly not moving oil? Is this also the bank that the camshaft plug may have blown out on? These are not positive displacement pumps. They are rotor. gear pumps. Possible pump damage or blockage downstream at de aerators to sump? Bank 1 (right) could be dry due to AOS directly attached there and most/all oil going to intake?

Originally Posted by 911monty

So to clarify, the left (bank 2?) cam plugs have been blown out and the scavenge pump is possibly not moving oil? Is this also the bank that the camshaft plug may have blown out on? These are not positive displacement pumps. They are rotor. gear pumps. Possible pump damage or blockage downstream at de aerators to sump? Bank 1 (right) could be dry due to AOS directly attached there and most/all oil going to intake?

I don't know which is bank 1 or 2. Someone could clarify for me right now: If I'm facing the same direction as the car, the left side of the motor is the one I'm talking about. Is that Bank 2? Probably, I guess, as it's offset-to-the-rear. ??

Yes, the Left side has the missing large cam plug, the smaller cam plugs that appear to have been blown-out, and the scavenge pump that drained oil when I pulled it out.