BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > 320 E90 N46 Oil Issues - Venting Oil from filler

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      05-13-2012, 04:16 AM   #1
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320 E90 N46 Oil Issues - Venting Oil from filler


I have a 2006 E90 320 M Sport. This car has had some issues with various oil leaks. I recently had the vac pump replaced and Valve cover gasket which both had leaks.

All has been OK for a while yet the other day oil was leaking from the two solenoid valves on front of block. I replaced both valves O rings and all was OK for a few days.

Oil is now leaking again. This time it has vented oil from the filler cap. Im starting to think there may be an issue with too much crankcase pressure causing all this venting ???

Is there a way to test the CCV system on this car. Im remiss to keep taking it to be serviced as its costing me a fortune with no real solution. I appreciate fixing these issues can only help but I think theres a greater problem. Blocked CCV ?? Am I on the right track ??? Can I test it ??

Thanks for the help guys...much appreciated.
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