Oil Catch Can

Merlin82 · 08-28-2018, 11:23 AM

Just curious if anyone here has installed an oil catch can on their N55. Been looking at them a bit to try and keep the intake/valves a bit cleaner. BMS sells a nice looking one but they say it doesnt work on F series, and im just curious about them mentioning that you just remove the pcv part in the intake and zip tie it and leave it plugged in.

So just curious what you all have an anything special when installing it.

Riick · 08-28-2018, 12:37 PM

The invention of the PCV was a turning point in the design of the internal combustion engine and is responsible for the long oil life and leak-free engines we have today. Removing that system for a vented to atmosphere breather with no scavenging or vacuum on the engine does nothing good... at all. In fact, it's very destructive and you're removing a integral part of any and all internal combustion engine design from your lawn mower to the fastest drag racing cars in the world. It will cut your oil lifespan in half and cause gaskets to fail and leak oil.

tracer bullet · 08-28-2018, 01:12 PM

I thought the OCC's didn't alter the PCV system, but maybe I'm thinking it for other N55 applications.

I bookmarked this a long time ago, it's an interesting read about the complexity of the system itself: https://www.e90post.com/forums/showthread.php?t=1349998

There's a chance you are trying to solve a problem you don't have. Maybe you do, maybe you don't, but keep it in mind.

oVeRdOsE. · 08-28-2018, 05:20 PM

on x3 n55 its very easy to bypass the pcv exhaust line.

Since the pcv out si connected with a flex hose on the charge pipe (see bms design).

Any good cheap ebay cc with some work will do the job.
Just like good old jdm cars.

not like my audi, the pcv is designed inside the head with special fittings, so I had to buy the whole assembly. $$$

Merlin82 · 08-28-2018, 06:50 PM

Quote:

Originally Posted by Riick

The invention of the PCV was a turning point in the design of the internal combustion engine and is responsible for the long oil life and leak-free engines we have today. Removing that system for a vented to atmosphere breather with no scavenging or vacuum on the engine does nothing good... at all. In fact, it's very destructive and you're removing a integral part of any and all internal combustion engine design from your lawn mower to the fastest drag racing cars in the world. It will cut your oil lifespan in half and cause gaskets to fail and leak oil.

I should have been more clear. The BMS catch can just has you remove the sensor and leave it hanging while the PCV system is essentially just re plumbed with the catch can inline with the hose. You can see in the pic what i mean. Their site says it doesnt work on F series, but besides the bracket likely having to mount it somewheres else, it looks like it would work perfect.

Riick · 08-29-2018, 05:45 AM

I would save your money, that's a fix to a problem the car doesn't have. Leave the PCV alone.

Merlin82 · 08-29-2018, 10:01 AM

Its supposed to help prevent buildup on the intake valves from oil passing through the intake. Wouldnt this be helpful in the N55's?

Riick · 08-29-2018, 11:39 AM

The carbon build up is due to the EGR not PCV.

TheCoolX3 · 08-29-2018, 12:21 PM

Yes that is the purpose of a catch can but, from my understanding, the N55 does not suffer from that issue nearly as much as a N54 would. Maybe its a good thing long term but its not really necessary.

Quote:

Originally Posted by Merlin82

Its supposed to help prevent buildup on the intake valves from oil passing through the intake. Wouldnt this be helpful in the N55's?

Fast4d · 08-29-2018, 04:47 PM

Quote:

Originally Posted by Riick

The carbon build up is due to the EGR not PCV.

that is wrong.

carbon build up comes from venting the crank case from valve cover.

oil gets into the intake tract fouling intake valve since gasoline is injected directly into the combustion chamber.

port injection would wash the valves with gasoline and detergent.

some Japanese engines are now DI AND port injected.

a catch can will reduce the amount of oil that gets into the intake tract.

I've seen indy shops advertising walnut blasting for $250

http://socalbmwinstalls.com/walnut-shell-blasting/

oVeRdOsE. · 09-01-2018, 06:58 AM

^^ this.

Merlin82 · 09-02-2018, 08:57 AM

Quote:

Originally Posted by Fast4d

some Japanese engines are now DI AND port injected.

My brother actually just bought a brand new F150 Ecoboost, and apparently it also has both Direct and Port injection. He had been looking at catch cans and the dealer told him he doesnt really need one because of the dual injection.

E90705 · 09-13-2018, 11:59 AM

You can indeed add a oil catch can. Not my f25

FranzX3M · 10-27-2018, 11:24 AM

Does the F25 N55 have a PCV valve that needs to be replaced periodically like in the old days when the cheap PCV check valves would eventually get clogged and stop working.

Also the setup in the photo above will not impact the function of the system at all. It just adds an inline catch can to trap some of the oil vapour.

Most of the intake valve fouling is caused by oil leakage past the valve seals although the PCV system does add to it.

08-28-2018, 11:23 AM	#1
Merlin82 Private First Class 44 Rep 191 Posts Drives: 2011 BMW X3 Xdrive35i Join Date: Feb 2017 Location: Edmonton, Alberta iTrader: (0)	Oil Catch Can Just curious if anyone here has installed an oil catch can on their N55. Been looking at them a bit to try and keep the intake/valves a bit cleaner. BMS sells a nice looking one but they say it doesnt work on F series, and im just curious about them mentioning that you just remove the pcv part in the intake and zip tie it and leave it plugged in. So just curious what you all have an anything special when installing it.
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08-28-2018, 12:37 PM	#2
Riick Banned 136 Rep 818 Posts Drives: BMW Join Date: Feb 2014 Location: USA iTrader: (0)	The invention of the PCV was a turning point in the design of the internal combustion engine and is responsible for the long oil life and leak-free engines we have today. Removing that system for a vented to atmosphere breather with no scavenging or vacuum on the engine does nothing good... at all. In fact, it's very destructive and you're removing a integral part of any and all internal combustion engine design from your lawn mower to the fastest drag racing cars in the world. It will cut your oil lifespan in half and cause gaskets to fail and leak oil.
	Appreciate 0 Quote

08-28-2018, 01:12 PM	#3
tracer bullet Brigadier General 2388 Rep 3,531 Posts Drives: '11 135i , '15 X3 35i Join Date: May 2011 Location: Saint Paul, MN iTrader: (1)	I thought the OCC's didn't alter the PCV system, but maybe I'm thinking it for other N55 applications. I bookmarked this a long time ago, it's an interesting read about the complexity of the system itself: https://www.e90post.com/forums/showthread.php?t=1349998 There's a chance you are trying to solve a problem you don't have. Maybe you do, maybe you don't, but keep it in mind.
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08-28-2018, 05:20 PM	#4
oVeRdOsE. Lieutenant Colonel 2701 Rep 1,529 Posts Drives: F25 E91 Audi Avnt E90 Cayenne Join Date: May 2018 Location: mtl iTrader: (0)	on x3 n55 its very easy to bypass the pcv exhaust line. Since the pcv out si connected with a flex hose on the charge pipe (see bms design). Any good cheap ebay cc with some work will do the job. Just like good old jdm cars. not like my audi, the pcv is designed inside the head with special fittings, so I had to buy the whole assembly. $$$
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08-29-2018, 05:45 AM	#6
Riick Banned 136 Rep 818 Posts Drives: BMW Join Date: Feb 2014 Location: USA iTrader: (0)	I would save your money, that's a fix to a problem the car doesn't have. Leave the PCV alone.
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08-29-2018, 10:01 AM	#7
Merlin82 Private First Class 44 Rep 191 Posts Drives: 2011 BMW X3 Xdrive35i Join Date: Feb 2017 Location: Edmonton, Alberta iTrader: (0)	Its supposed to help prevent buildup on the intake valves from oil passing through the intake. Wouldnt this be helpful in the N55's?
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08-29-2018, 11:39 AM	#8
Riick Banned 136 Rep 818 Posts Drives: BMW Join Date: Feb 2014 Location: USA iTrader: (0)	The carbon build up is due to the EGR not PCV.
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09-01-2018, 06:58 AM	#11
oVeRdOsE. Lieutenant Colonel 2701 Rep 1,529 Posts Drives: F25 E91 Audi Avnt E90 Cayenne Join Date: May 2018 Location: mtl iTrader: (0)	^^ this.
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09-13-2018, 11:59 AM	#13
E90705 First Lieutenant 127 Rep 383 Posts Drives: E90/F25 M-sport Join Date: Mar 2015 Location: Central iTrader: (0)	You can indeed add a oil catch can. Not my f25 Attached Images
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10-27-2018, 11:24 AM	#14
FranzX3M Private 17 Rep 80 Posts Drives: '13 X3M Join Date: Jan 2017 Location: Toronto, Canada iTrader: (0)	Does the F25 N55 have a PCV valve that needs to be replaced periodically like in the old days when the cheap PCV check valves would eventually get clogged and stop working. Also the setup in the photo above will not impact the function of the system at all. It just adds an inline catch can to trap some of the oil vapour. Most of the intake valve fouling is caused by oil leakage past the valve seals although the PCV system does add to it.
	Appreciate 0 Quote