Cody, I think this is the diagram you should be using.

 

Edit #3. I ran the green line how it is supposed it go, BUT the valve is bigger than the hose diameter!? Now what?

-Cody

Edit* That must be why Joe. Thanks, I'll try that!

 

Cody: You're right about the diameter of the PCV and the OCC line--I used a T and simply capped off one side of the T. You can actually see it in my photo in post #70.

You're almost there...

 

Ok, is this how it's suppose to be!? I'm going insane here lol.





And does it matter which side the lines go on the OCC? As you can see, grey line is going to the LEFT side of the OCC, and the PCV line is going to the RIGHT side.

 

Looks good Cody. Im not aware of any specific line orientation on the OCC.

 

It should matter which one goes where. If the unit is designed well the inlet piping will lead towards the bottom of the unit. Normally below some filtering material. The outlet will be above this material so that oil will collect in the material and not be draw back into the outlet.
Ideally the can should set lower than the PCV line so that oil doesn't drain back into the valve. Not a huge deal but something to keep in mind for sure.

 

Polizei, this "how to" should remove any doubt as to how to hook up an OCC correctly.
Good Job

Wow, which post?

 

WRT the How To. Although it makes life much easier, and allows you to clean any oil from the IC, it's not essential that you remove the IC. With the preferred routing (my diagram above) you can access the PCV and the grey line after removing the plastic IC cover. Not a lot of room but enough.
I also installed rubber grommets in the holes cut in the cowl through which the OCC lines go. Much neater and may prevent wear over 100,000s of miles...
Although the cowl location for the OCC is neat, having it down near the front left bonnet clasp and earth strap guarantees it is lower than the PCV. Unfortunately this is not available with either the Xenon headlight washers or the engine damper, so the cowl is the next best location.

cheers,

 

DOES THIS SET-UP WORK as pictured below?

 

Bart, I had my catch filter installed like that and caught nothing but moisture.

 

Deleted.

 

Absolutely not! Listen to these people. My diagram of the **Preferred Routing** is on this thread. The diagram in post #84 above is the way that Alta, and M7 and others suggest, but it is not a good way to route an OCC. Leave the RHS vent alone, and leave it connected to the intake before the TB.
I wish I had not posted that drawing now--if the preferred routing were the only one posted then that's what people would use.
Oh, well. It should be clear by now.
cheers,

 

I feel a confession is in order. A couple weeks ago I printed out a copy of this diagram. I then took it down to a local art gallery and, well, it sold for $4200! I think I owe someone a couple bucks.

 

Dr. Phil, who knew? You are a big time artist.

Bart as Partsman said, you will collect water & there may be an unpleasent oder as well. With this setup is the crankcase venting is bad to none at all. There is a post by motonikki812 about the bomb under the hood. His valve cover exploded.

Ah, another day being a Mini owner. All you need to think about is, are my shock towers ok, will my power steering pump catch fire or will it be the ABS controler that will burn the car to the ground. Yup, life is grand.

 

Thanks guys . Here is my experience that will hopefully help others.

1) I did the original OCC setup like Alta/M7 suggested - trapped milky water.

2) previously when I experimented w/ my own homemade OCC, I had done the single sided setup (like obehave pictures in #81) - trapped oil nicely. I do recommend placing steel wool inside the can for it help catch more oil.

3) I decided to try the setup I questioned above - routing both engine vents thru OCC to grey tube. UNFORTUNATELY, the pretty aftermarket tubing collapsed WHICH CAUSED a) burning oder and b) developed a squealing sound. Perhaps with good tubing this will work? BUT have decided to revert to a single sided setup for it trapped oil.

I can only hope I did not do any long term damage.

 

Deleted.

 

This diagram is the wrong way to plumb the catch can. There are two different "curcuits" that should be maintained. Do some research on the pressure differentials inside the Mini's engine (this forum) and simply install the catch can in-line on the PVC to gray line only.

 

Would you all please stop posting the drawing of the **not preferred** routing I drew? Geez--we've gone over this enough times. I'll pull it from my website... The preferred routing is from the PCV to the OCC back to the grey line from the SC. Enough already. There's new information, and much more experience which makes posts like the one above "out of context".
Remember: this is the preferred routing:


OK?

 

This routing that yoy all did your best Picasso imitation on post#93 is the RIGHTway to do it. I tried the other ALTA/M7 suggested routing and it was not good. To make a long story short my beautiful JCW valve cover litteraly turned into a hand grenade. BOOM!

I say that we were not getting enough vacuum or suction from the grey tube through the OCC then sucking any positive pressure out of the valve cover.

This method of yours just makes so much more sense. This is what I am running now. I learned the hardway!

Jasun

 

Exactly

The crankcase NEEDS venting.

THE END

 

that seems reasonable. bmw ain't too stupid.

 

They aren't alone. Can't say I have ever seen a sealed system on any intrnal combustion engine, even a 2 cycle uses the intake port, piston, reed or rotary valve for air, all be it for fuel dilivery as well.

 

btw, I pulled my DFIC to install the airfoils, and it's so clean inside that it doesn't even *smell* of oil! I'd say the preferred OCC routing is working very well to keep oil out of the IC.

 

My experience is that the M7/Alta setup collected milky water and the single sided set-up (i.e. connected to grey vaccum) collected more oil for the OCC contents were much darker in color.

 

so the question is....do you want to trap mikly water and such or the oil?