2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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5,412 Posts
Not correct. Check valve usual prevents back fire from going into engine crankcase. The intake sucks from the engine through the PCV valve - the PCV valve should close when engine pressure is greatest - to prevent oil from entering intake.There should be a check valve from the catch can to the intake on the PCV hose so hydro lock wouldn’t likely happen but yes, clean out the oil every oil change.