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      12-04-2016, 07:17 PM   #1
Cdutch513
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So much blow by

2010 N52 ESS supercharger with BMS OCC.
I pulled my OCC out today at 2500 miles since my last oil change. The can was filled completely, the inlet line was 3/4 filled with a yellowish gunk, the outlet had a little gunk and some gas that was stuck at the lowest part of the line, and there was some gunk in the PCV outlet. What could this be from?
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      12-04-2016, 09:36 PM   #2
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It is possible the pressure from supercharger is preventing the oil separator/pcv valve that is found on the valve cover to work as it should. It has a membrane that maintains controlled vacuum from crankcase. One side of the membrane is open to atmospheric pressure, the other side is subject to intake vacuum. The boost from supercharge will make positive pressure instead of vacuum I would think.
[edit]
ESS kit maybe rerouting the valve cover breather hose from intake to before the supercharger, then it may be okay. Though not sure how much vacuum will be there. I am not experienced with turbo/supercharger. All I know is the oil separator/pcv/valve cover breather system in N52 works on intake manifold vacuum.

Last edited by PhaseP; 12-05-2016 at 01:18 AM.
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      12-04-2016, 09:41 PM   #3
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And/or your oil separator/pcv unit on the valve cover just simply gotten dirty and old.
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      12-06-2016, 08:22 AM   #4
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Quote:
Originally Posted by PhaseP View Post
It is possible the pressure from supercharger is preventing the oil separator/pcv valve that is found on the valve cover to work as it should. It has a membrane that maintains controlled vacuum from crankcase. One side of the membrane is open to atmospheric pressure, the other side is subject to intake vacuum. The boost from supercharge will make positive pressure instead of vacuum I would think.
[edit]
ESS kit maybe rerouting the valve cover breather hose from intake to before the supercharger, then it may be okay. Though not sure how much vacuum will be there. I am not experienced with turbo/supercharger. All I know is the oil separator/pcv/valve cover breather system in N52 works on intake manifold vacuum.
They did reroute it to before the supercharger. But i thought the n52 didn't have intake vacuum because of valvetronic.
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      12-06-2016, 10:09 AM   #5
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It still has vacuum but not enough to run brake booster.
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      12-06-2016, 07:13 PM   #6
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btw how's your experience with Ess supercharge ?
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