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      08-03-2008, 12:53 PM   #4
canlefty
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Drives: 2015 F82 M4 MW/SO
Join Date: May 2008
Location: Calgary

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Quote:
Originally Posted by jkp1187 View Post
Ok, but what does it do? Where does it 'catch' the oil from? What does it stop the oil from going to?
It's an oil - air separator. Positive crank case pressure can cause bits of oil to be discharged through the intake via the vent. The catch can will separate the oil in the air and prevent it from coating your intercooler, etc.
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