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Old 11-20-2012, 10:40 PM   #7
tank the ek
Scooby Specialist
Member#: 295911
Join Date: Sep 2011
Chapter/Region: NESIC
Location: CT
2015 WRX


Well, it's being pushed out due to blowby, the natural occurance in a turbocharged engine when boost seeps past the piston rings during your engine building/ sustaining boost and therefore creates positive crankcase pressure instead of vacuum.

Due to the style of those hoses and clamps, it's possible for a slight amount of oil to seep, not leak, from those lines. Without completely secure connections with o-rings, or the use of screw type clamps, the compression of those lines at time is compromised in the slightest fashion by the blowby.

It is nothing to loose sleep over or freak out about. You can change all of your squeeze style clamps on your breather hoses to a screw style. But you may still achieve the same result due to the multiple connections of hoses and components. An AN style breather hose would be less susceptible to this seepage, but again, it is not of major concern since the oil seepage is not a large detrimental amount at all.
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