Quote:
Originally Posted by gutterball
I believe the line going to your oil filler has to have a check value. I have basically the same hookup but with no line going to the oil filler
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You only need a check valve between the catch can and the intake, as well as the catch can to its boost vacuum source (the elbow at the blower intake) the css is just a fresh air inlet to the filter flange with no check valve. There is supposed to be no restriction in that area to promote maximum clean air flow through the PCV system.
That is what I was told. I have also found that if I did not put a check valve in the line to the Evap solenoid that I would bleed boost into the EVAP system over 7.2 PSI in the intake manifold. You are also probably going to need a restriction in the line from the center of the catch can to the dirty side. This was also from personal experience of over evacuation.
Collecting oil in your catch can is not a sign of proper function unfortunately. Oil should stay in the motor. The goal for me was to get rid of the acidic and harmful blow by GASES. When they are forced to settle in the catch can it is a very different liquid that smells like sulfur and can be foamy or watery oily substances.
It's a very hot topic, but that is my personal take on a system set up how you had drawn the diagram.
P.S. what I experienced was a blown seal at the valve cover gasket and 2 spark plug tube. The cure was the restriction I put in line from the can to the dirty side, which bottle necked my 1/2 to roughly 3/8. But most importantly was from the intake manifold to one port on the catch can. It was reduced from a 3/8 to 1/4. Do you get any squeal? Try pinching the hose and go for a drive and see if it induces a leak or not after you reduce the over vacuum on the system (if that is the issue like mine was)