Engine Drivetrain 2nd Gen S Most liked posts in thread: PCV hose, delete.

BMW did not do that because venting those fumes to the atmosphere is adding to air pollution. Cars are getting cleaner & cleaner for a reason & that is government regulations keep getting more stringent.

 

No.... BMW would never vent the PCV gases directly to the atmosphere without first cooking off the fumes by running them through the engine followed by the catalytic converter along with all the other pollutants.

With the 2011, two vents have been reduced to one. The path eliminated is the hose leading from the valve cover directly to the intake manifold. The other one remains in place and the fumes on the 2011 are drawn into the cold air side of the turbo, flowing through the inter-cooler and into the intake manifold, kissing the intake valves and into the engine. Just a longer route. Always being drawn into the engine to be "cooked" off. The problem remains, it just will take longer to show up as carbon buildup. And of course, the Dinosaur snot will cake the inside of the IC as well. Maybe the IC should be called a OCC that doesn't have a drain???

 

I asked the shop foreman at North West MINI about the missing PCV hose on the 2011 cars. He told me that the head is different on the 2011 engines, there are now passages in the head that run from the space under the head cover to the intake ports. He said that they changed the design because there was a problem with oil collecting in the throttle body on the engines with the PCV hose.

I also asked about the BSH Oil Catch Can and dual boost port, he was concerned that it is a modification to the PCV system, which is against EPA regulations. But he also said that a number of cars have been through the shop have them and that they haven't caused any problems on the engines he has seen.

Dave

 

In other words, if you think the problem is solved, it is all in your head? :lol:

Jim

 

I love those neet looking caps, where did you get them? Are they OEM somewhere or what? They look OEM. I currently use a BSH Boost port with the blocking plug on the manifold side and the BSH OCC on the turbo side. Tight as a toads butt.

D

 

Complete with check valve...

 

Ok so now you are building up crank case pressure. how do you plan to fix that?

 

Which then condenses inside the intercooler on it's way to the intake valves via the intake manifold..... Unless there is an effective OCC in the air path.

 

I must admit, this seems intriguing. Keep us updated on how the car performs over time. You are a braver soul than I.

 

If that is the simple fix, don't you think the engineers at BMW would have done it. Just saying, but this could lead to problems you have not thought of. Keep us posted.

Jim

 

They did for the 2011 models.

czar, please share where you got the plugs from!!

 

Wonder where the crank case gases are vented to now on the 2011? They sure do not vent those to the atmosphere. I think BMW does see a problem with their direct injection. Other makers are seeing similar problems with their direct injection engines.

 

Interesting......
So they eliminated the long hose going to the IM because on the N-18 it's not needed since the PCV vapors will be drawn directly into the runners over the intake valves and into the cylinder all in an effort to eliminate the oil pooling (PCV vapors) at the throttle body.

So from the outside it looks like they eliminated the carbon buildup possibility (the missing hose), but in reality the issue of carbon buildup may still be there??? Hmmmmmm:confused5:

So these new "Block off" caps being discussed may be a MINI retrofit solution to oil pooling at the throttle body. Since the N-14 head doesn't have these "special" oil channels in the head like the N-18, the PCV fumes will be routed through the second valve cover opening into the cold side of the turbo, if the block off caps are used w/o a OCC on the N-14 engine.

Hmmmm..... N-18 owners won't be able to filter the PCV fumes with a OCC because the routing is all in the head.

 

sooo. are these some sort of OE plugs? They look it

 

:crazy: :crazy: :crazy:

 

This is truth

 

From a basic physics perspective I just don't see how these so called "passages" would work or could even exist unless each passage had its own little associated PCV valve that was only open under vacuum.

Under boost conditions, you would be continuously losing pressure into the crankcase and back through the valve cover vent into the turbo inlet pipe. Worse yet, under boost your turbo would be effectively pressurizing the crankcase along with the intake manifold--death to gaskets and seals.

If such passages exist, there has got to be more to the story.

 

You must first let go and feel the Force, as only then will passages reveal themselves to you Luke.

Jim

 

Jim..... you are always thinking about food?