I have driven it around for a few months with no catch can, just the original hose that goes from the valve cover to the CCV just hanging in the engine bay, I didn't get any residue.
Originally Posted by DangerousMind
Just wait a few months and you will have oil residue all over your engine bay and an oil caked catch can filter. Also, how does your air conditioning smell?
Air conditioning smells fine the microfilter housing seals against the underside of the hood.
Of course YMMV.
'04 330Ci Clubsport | Estoril Blue | 6MT | Black Leather/Silver Cube
Turner Motorsport | Ground Control | Stett Performance | Moroso | Powerflex | Meyle HD | Goodridge
Last edited by Dan330Ci~; 08-08-2011 at 02:48 PM.