If this post appears twice I apologize. Submit thread didn't seem to work.

I have a Mishimoto catch can with 3 ports 2-IN and 1-OUT. I want to draw off the bad stuff from the rear PCV and the driver's side PCV?

How do I route the vacuum pipes so one can serves the two ports?
Which direction do I install the check valves?

is there anything I would be missing or need to consider?

I've attached a pdf of the general layout if you are curious.

Thanks for any insights or guidance you can share.

Dan Raabe

 

I spoke with a handful of people I think know something about this subject and the consensus is that I need two catch cans. There simply is not enough space, so I will catch the crud from the driver side PCV with the can on the firewall and try to devise a way to catch the crankcase junk from the rear another way.

 

i have the same catch can and i tried every possible routing so i have experience.

plug one of the inlets on the catch can with a plug bolt (cancel it). route turbo side to the other catch can inlet and route outlet to the turbo intake pipe. buy blind caps for passenger side pcv.

it's been almost 100k kms since i installed it this way. it works like charm.

 

I too have mine pvc blocked on the passenger side, got the plugs from ECS and have a DIY OCC on the driver side. You will need 2 plugs, one for valve cover and one for throttle body.






No CEL runs like a top and burns same amount of oil as it did stock. There is a dual OCC out there but I think it is a bit pricey but will fit back where mine is, and there is one made for the passenger, there is a gentleman that is running it, and I have been following his thread.

 

Excuse me for barging in.

I am currently in the process of searching which OCC to buy.
I've seen Mishimoto, BSH, M7 and more.

I was having a hard time deciding which to buy (the price vary widely) but in none of the videos I watched of the installation, did they mention these caps and a passenger side PCV.

Would anyone mind giving me an explanation from A to Z about what needs to be purchased and done in order to have an OCC installed in my MINI? Please?

2012 R56 LCI Cooper S N18

 

N18 you don’t need the plugs as you don’t have the dual pcv thing like the n14. I sir have the n14, and the plugs are a hit and miss mod. I’m having no issues with this mod, and I’m trying to keep that mess off my intake valves. As for the OCC, Most are plug in play, I honestly have not looked for anything for the n18, but I choose to save a few bucks and make my own for under 50. I had to cut a stock tube, where the kits have all the fittings to make it plug and play. Comes down to how much do you want to spend.

 

Since you have an N18 engine, you don’t have the vent tube in the back of the cam cover. So, you can ignore that part of this thread. You only need to be concerned with the vent tube that routes to the turbo inlet.

If you still feel the need to install a “catch can”, look for one that has internal baffles to separate the oil and air. Otherwise, the oil will still find its way to the intake.

 

Thanks for the quick reply and the info.

I don't mind spending even $300 on a catch can, just as long as it's really worth it.
For example, the BSH seems to be very recommended but I failed to understand why it's better than the M7 which costs half the money.

What does "Internal Baffles" mean? what do I need to look for?

EDIT:
I see some people are saying the N18 does NOT need an OCC at all. Why?

 

I went with mine because I could unscrew the “cup” from the OCC and drain it that way. I didn’t really want to mess with one that drained from the bottom, just my cup of tea. N18 needing one? All I can say there is search and read, what I’ve been doing since 11/30/19 when I picked her up.

 

If I was going to install a “catch can”, I would go with something like this:
https://www.moroso.com/catalog/produ...k-finish85497/

An air-oil separator will pull the oil out of the vent line. I’m not sure what vehicle they have it installed, but their product video actually shows the oil being spun out of the air inside the can.

 

Can you explain this mor3 clearly. It makes no sense. Are you sharing vacuum to the manifold and the turbo? How? If you block off the pcv you are forcing moisture and gasses through the valve cover.

 

I bought mishimoto on sale. I may have found a solution for two cans but i dont have the parts yet. The problem is space. I cannot answer to plugging the passenger side ports. I tried that once and the engine ran crappy. You have to be careful that the crankcase pressures are mitigated properly by the pcv valves. If not you are screwed and the problem is worse than oil on the valves. Send pix.

 

The solution is you want a catch can plumbed in each of the PCV lines - one in the line from the back of the cam cover, one in the front vent line to the intake tube.

 

I have mine blocked on the passenger side and OCC on drivers side, on the N14.

dont poor into a solo cup, first time emptying it



This is after 600 miles
I know that you wont be able to tell how much that is, so i have been keeping track of it and over the last 8000 miles i have collected half a qt of this.

 

Do you mind share the part number for that plug, I’m going to try that on my mini.

 

https://www.ecstuning.com/Search/Sit...h/11617596034/ sorry it took me a bit, had to dig to find it.

 

Im not sure about blocking the rear port. I blocked mine off and my catch can filled up about every two weeks with some disgusting sewage like I’ve never seen before. Not only that but the car idled poorly and it started misfiring. It could have been another cause but misfires are bad.

 

did you block both ports, one at the valve cover and one down on throttle body? If not there was your issue, it only runs rough if there is a vacuum leak there. 8000 miles and no issues, you had some else wrong.

 

Of course! I installed two plugs. I'm not sure at the moment but I hope I've found a way to use two catch cans. That solves the problem because I don't think the vacuum is the exact same at both ports. I could be wrong. I contacted some guys who make these things to order but they are really difficult to get to respond. So, for now, it's Mishimoto. They answer the phone.

 

thank you

 

here’s a video showing my dual catch can setup, it’s pretty easy

 

FWIW, I have experience with the direct injection Volkswagens. I tried venting to atmosphere VTA for some time to see if it would help. Still had build up in the manifold and on the valves. There is an Audi patent to burn it off, 3000+ rpm hard driving for 30 min. It works. 'Italian tune up.' I have a car with 174k and build up is not bad at all. I know people love their catch cans, but I think it's just another thing to maintain. Mostly catches moisture and turns it into water.

 

Sounds like fun, I have try the Italian tune up.

 

Dude this is awesome. I have so much oil dripping down between the intake pipe and the intake manifold its vile. And the engine has 10k miles on it. Brand new engine with valve cover from dealer.

I have one of those cans, need to get another. What are the fittings youre using to make the connections???

These?: https://www.homedepot.com/p/Everbilt...0309/300862904

 

I live in Savannah GA. I drove to Palmetto FL to see Tracy Lewis the owner of RX performance.

I own a 2012 Mini Cooper R58 JCW with a N14 engine. He designed and holds the patient to his catch can system. When I left Savannah I reset my mpg counter to see the difference. I was getting about 32mpg at 80mph. RX performance performed a walnut blast of my exshast valves and chamber. Mr. Lewis then installed his catch can system.

Mr. Lewis also educateted me on various catch can on the market. I was running a single M7 can. He had many catch cans that are popular on the market today. He has cut them open to show just how useless they are. You probably have one in your car right now. A real catch can system must include one way check valves to prevent back flow when in boost and non boost. I will not go into the design of the catch can its self he holds the patient.

A huge majority of catch cans are empty inside. So basically the bad stuff that damages your engine travels through the tubing into the can under huge vacuum then gets sucked right back out. Basically the catch can I had in my car and you have in your car does absolutely nothing but look cool.

My M7 can which was expensive just looked cool. So my trip back to Savannah I reset my mpg counter. At 80mph for over 6 hours my mpg was almost 40mpg. I noticed the cars performance was greatly inhanced. My car held boost no turbo lag. Mr. Lewis has developed his catch can system over a decade. He has had a lab I believe in Minnesota test his system over thousands of miles. The independent lab determined that the oil did not need changing and did not need to be changed for as much as 10,000 miles longer.

I want to say I am in no way associated with RX performance. I am just a happy customer. I am not being paid nor received or going to receive anything for this post. I am writing this for two reasons only.

First am tired of being lied to and ripped off by manufacturer and throwing my money away with zero benifits. The second reason is Mr. Lewis took the time to educate me and had actual catch cans that were cut open that I could hold in my had and see just how useless they all are. I am just trying to save my car and yours.

Mr. Tracy Lewis has RX performance catch can videos on YouTube. He is the type of guy that you can pick up the phone and call and he will help you. I do not believe that you have to go to his shop for installation. I am sure you can contact RX performance order what you need and install the system yourself with instructions provided. I am sure if you have any questions you can call him and he will help you any way he can.