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      08-20-2015, 03:48 PM   #5
zeeth2800
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Drives: 08 135i, 89 M3
Join Date: Oct 2013
Location: Corvallis, OR

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Quote:
Originally Posted by J. Dub View Post
What causes the smoke in the first place?
And thanks for the update. Guess I'll get a BMS one as well.
Oil being pulled into the intake and then burned off in the cylinders. The catch can separates the oil and air so only the air recirculates back through the intake.
Every so often you will want to empty the catch can. I have heard this is good to do every oil change.
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2008 135i SGM 6-Speed l AD Engineering ST 6262BB l MHD Tuned l MAXBoost/N20 Map l GFB electronic boost controller l Spec 2+ l Walbro 450 LPFP l VRSF 7" FMIC l VRSF CP l Tial BOV l BMR 3.5" Exhaust l BMS Catch Can l RB pcv l
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