Join Date: Dec 2005
Location: Upper Central Midwest
So, it sounds like the oil vapor gets circulated back into the crankcase via the valley cover?
Since clean air enters the valve covers via the the "Y" and tubing, the question is how is it vented if there is no vacuum drawing the filtered fresh air in? It sounds like the valley somehow provides some vacuum? Trying to wrap my head around how that may work.
If it is like the V8 explained earlier, then the valley somehow has a vacuum connection behind the base of the Throttle Body? If that is the case, then the intake manifold and back of the intake valves are still "seeing" oil and water crankcase vapors.
2017 2WD Colorado LT V6 Luxury & Convenience Pkgs, Black/Ashen Gray Leather, Bullet Bedliner, ARE cap.
Last edited by GraniteBlue05; 04-17-2017 at 05:09 PM.