Help....and I have used the search button lol, but I want info from someone specifically about the N18, I have a 2012 Coupe S and want the catch can on ASAP but not sure which can is best the BSH which says its for the model year but says N14 engine and under my hood it says N18 engine.....OR the NM catch can. Also I want to totally block off the PCV correct?? Which is adding the boost tap with BSH but is included with NM can?? Thank you in advance.....

 

There is no possible way of blocking off the PCV because it has been intergrated into the engine for the N18...not sticking out the back like the N14 engine...which has lead many people to believe that the carbon build up is/has been addressed.

This is why I have cancelled my order for an OCC, I have checked my tubes and intercooler and have not seen any sign of oil or gunk in general.

I know BSH has a catch can for the N18, but as far as I know, anywhere you look you will have to pre order it.

The only sure way to know if N18's need it is if someone takes there manifold off and takes a peek at the valves for any signs of build up.

I have 8000 miles on my 2012 Coupe S and I'm not really worried about it.

 

below is a discussion of occ for the n18. there maybe some good news that an occ is not needed on n18.

https://www.northamericanmotoring.co...-2011-mcs.html

 

Thank you so much for finding that! I am still waiting to see if its necessary, if I do it I will leave on PCV.

 

The BSH can here is the only one for the N18 engine available.
http://www.waymotorworks.com/bsh-n18...-r57-2011.html