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Oil and gas in black tube that comes from the airbox to I would say the intakeenter image description here

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The engine is producing more blow-by gasses than the PCV system can handle. 3 solutions have been used to remedy: 1. Increase the flow rate of the PCV valve by owner modification. 2. A separator placed in the hose to the airbox ( a can or jar with In and Out hose fittings) 3. The air flowing thru the crankcase needn't be filtered so route the hose down towards the ground as the air source of the PCV system.

  • This is common blow-by. What is your oil level like? too much oil will create more as the crank case preasure increases. You can install a 'catch can' inbetween the crank vent and airbox to stop it going into the airfilter housing. – DamoC Mar 10 at 21:41
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You should put Car's Year, Model, engine type first in order to respond to your question more accurately as possible.

I have a 2011 BMW X6 Direct Inject engine and it builds up some goo(oil+water+dust)inside of intake pipe. I usually clean up once a year but many people recommend to add OIL CATCH CAN to reduce the oil gunk that flows into the intake to burn.

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