E90Post
 


TNT Racewerks
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Crankcase Breather/Oil seperator



Reply
 
Thread Tools Search this Thread
      10-13-2010, 09:23 AM   #1
SteveF1
Captain
 
SteveF1's Avatar
 
Drives: BMW 320D M Sport
Join Date: Mar 2010
Location: Manchester

Posts: 626
iTrader: (0)

Crankcase Breather/Oil seperator

My cars major third service is overdue and my local dealer stated that my crankcase breather valve/oil seperator (whatever they call it) may need replacing as after around three years they become blocked and can cause no end of engine problems. On reading stories on the net this appears to be the case but more so for the previous 3 series, not really the E90.

I have been ringing round for quotes and on speaking to one dealer the E90 does not need its breather valve replacing and should last the life of the car stating it was only the E46 that suffered failures after poor maintenance.

I need some advice re this as some dealers are saying replace it and others not.

BTW on the last key check the car did NOT indicate any problems in this area or that it needed replacing but I've been getting a lumpy idle for the past 6 months and some say this could be a contributory factor?

Whats nice to know is that BMW dealers know their cars well.....
SteveF1 is offline   United Kingdom
0
Reply With Quote
      10-13-2010, 12:00 PM   #2
JonnySi
BMW Technician
 
JonnySi's Avatar
 
Drives: BMW
Join Date: Jun 2010
Location: England

Posts: 197
iTrader: (0)

Since september 2005 built cars the breather has been deleted from 3rd oil service. It is a venturi style breather rather than a little filter, and therefore cannot block.
JonnySi is offline  
0
Reply With Quote
      10-13-2010, 12:12 PM   #3
ibanezking
Weekend Rockstar
 
ibanezking's Avatar
 
Drives: E92 M3
Join Date: Feb 2010
Location: Leigh, Lancs

Posts: 728
iTrader: (1)

i would say for the minor cost of it - its worth the peace of mind.............
__________________
E92 M3 - Interlagos Blue and Black everything else!!!
ibanezking is offline   England
0
Reply With Quote
      10-13-2010, 12:13 PM   #4
AlwynMike
Captain
 
Drives: E91 335d.
Join Date: Sep 2010
Location: Shropshire, UK

Posts: 933
iTrader: (1)

This is a growing problem with 5 series (E60) diesels, particularly the 6 cylinder ones. The problem is that the original breather was what is termed a "loo roll" type, from its shape - the breather has an oil separator inside it (to separate oil from the crankcase gasses before the gas is fed back to the inlet for burning off). The loo roll type has a separator that is similar to a coarse filter element, hence the nickname. This element is prone to blocking from oil particles (not necessarily from poor maintenance). If the breather gets blocked, the engine tends to run on its own sump oil, so you cannot switch the car off, and can run to destruction. The replacement is a "vortex" type, which cannot get blocked - thankfully.
On the 5er, the vortex type is a straight swap for the loo roll type. Some $tealers try to seel you a complete unit - breather and housing, but it's not necessary. IIRC mine was 27 - fitted myself.
On the 530 (as the E46 330), the air filter is a time consuming affair to change, but to change the breather at the same time will add about 5 minutes to the job. I'm not familiar with the air filter on the E90, so I can't say if this will be the same on yours.
On the 530, the breather is located on top of the engine, to the left of the rocker cover, between the inlets - it's a quick job once the engine cover is off.

Mike
AlwynMike is offline   United Kingdom
0
Reply With Quote
      10-27-2010, 02:31 PM   #5
Will0800
New Member
 
Drives: E36 M62 conversion
Join Date: Oct 2010
Location: Reading

Posts: 7
iTrader: (0)

Quote:
Originally Posted by JonnySi View Post
Since september 2005 built cars the breather has been deleted from 3rd oil service. It is a venturi style breather rather than a little filter, and therefore cannot block.
Your right, it is a venturi style filter, but beleive me, they can block! I work on these all day long and it's not uncomon for the pipes leading to the crank case block up with thick oil and oil sludge wich causes the oil seperater to block and causes all sorts of issues!
Will0800 is offline  
0
Reply With Quote
      10-28-2010, 01:21 PM   #6
F104
Captain
 
Drives: E92 320D M-sport
Join Date: Apr 2008
Location: belgium

Posts: 722
iTrader: (0)

this is what it looks like on 320d N47 engine. First is valve cover with pressure regulater, over-pressure valve, and cyclone filters. Second is the cyclone 'filter'


Attachment 448583

Attachment 448584
F104 is offline   Belgium
0
Reply With Quote
      10-28-2010, 01:26 PM   #7
F104
Captain
 
Drives: E92 320D M-sport
Join Date: Apr 2008
Location: belgium

Posts: 722
iTrader: (0)

try again...
Attached Images
  
F104 is offline   Belgium
0
Reply With Quote
      02-09-2011, 04:59 PM   #8
Mattsad
Registered
 
Drives: E90
Join Date: Feb 2011
Location: Manchester

Posts: 1
iTrader: (0)

Hi there will I have a problem with my turbo people in BMW are so un helpful it is un real please can you post if you still come on here i think i have blown my turbo i need to find reasons why it's on e90 56 plate thanks
Mattsad is offline  
0
Reply With Quote
      02-15-2011, 08:15 AM   #9
lemans 330d
Conversion Champ
 
lemans 330d's Avatar
 
Drives: 330d M sport
Join Date: Sep 2008
Location: Secret Location U.k

Posts: 2,178
iTrader: (30)

Garage List
Quote:
Originally Posted by SteveF1 View Post
My cars major third service is overdue and my local dealer stated that my crankcase breather valve/oil seperator (whatever they call it) may need replacing as after around three years they become blocked and can cause no end of engine problems. On reading stories on the net this appears to be the case but more so for the previous 3 series, not really the E90.

I have been ringing round for quotes and on speaking to one dealer the E90 does not need its breather valve replacing and should last the life of the car stating it was only the E46 that suffered failures after poor maintenance.

I need some advice re this as some dealers are saying replace it and others not.

BTW on the last key check the car did NOT indicate any problems in this area or that it needed replacing but I've been getting a lumpy idle for the past 6 months and some say this could be a contributory factor?

Whats nice to know is that BMW dealers know their cars well.....
steve have it changed as its the common cause of the turbo blowing and with all the claims BMW may have had in the near past they are probably taking precautions at last.
lemans 330d is offline   United Kingdom
0
Reply With Quote
      03-29-2013, 08:18 PM   #10
bbstoke
Private First Class
 
bbstoke's Avatar
 
Drives: 2006 e90
Join Date: Jun 2011
Location: Stoke-On-Trent

Posts: 148
iTrader: (0)

Garage List
2006 318i SE  [5.00]
Send a message via AIM to bbstoke
Quote:
Originally Posted by JonnySi View Post
Since september 2005 built cars the breather has been deleted from 3rd oil service. It is a venturi style breather rather than a little filter, and therefore cannot block.
What's causing light brown mayo on my oil cap?
I know it's not the head gasket,been freezing here for a while and only doing little runs,could this cause it? Was going to get the oil breather pipe off to clean out, am I wasing my time?

Regards
bbstoke is offline   England
0
Reply With Quote
      03-29-2013, 08:21 PM   #11
bbstoke
Private First Class
 
bbstoke's Avatar
 
Drives: 2006 e90
Join Date: Jun 2011
Location: Stoke-On-Trent

Posts: 148
iTrader: (0)

Garage List
2006 318i SE  [5.00]
Send a message via AIM to bbstoke
Quote:
Originally Posted by Will0800 View Post
Your right, it is a venturi style filter, but beleive me, they can block! I work on these all day long and it's not uncomon for the pipes leading to the crank case block up with thick oil and oil sludge wich causes the oil seperater to block and causes all sorts of issues!
Can these be cleaned out or do they need to be replaced?
bbstoke is offline   England
0
Reply With Quote
      03-30-2013, 03:07 AM   #12
Brian mc21
Captain
 
Brian mc21's Avatar
 
Drives: E91 320d M Sport
Join Date: May 2011
Location: Belfast. Northern Ireland.

Posts: 843
iTrader: (4)

I replaced mine on Friday 07 E91 320D. It was 57 quid iirc. We bit of stripping to get at it but an hour done it. I wasn't sure when mine was last done but as said above for all it costs get it done to ease your mind.
Brian mc21 is offline   No_Country
0
Reply With Quote
      03-30-2013, 05:58 AM   #13
seanblee
Captain
 
seanblee's Avatar
 
Drives: E92 335i SE
Join Date: Dec 2008
Location: Enfield, UK

Posts: 752
iTrader: (2)

Send a message via MSN to seanblee
Quote:
Originally Posted by bbstoke View Post
What's causing light brown mayo on my oil cap?
I know it's not the head gasket,been freezing here for a while and only doing little runs,could this cause it? Was going to get the oil breather pipe off to clean out, am I wasing my time?

Regards
It probably is the short journeys. The system isn't sealed, so cold damp air can get in. As the engine warms up, the moisture in the air will condense at the high points (like the filler cap), then dry out as the engine gets to full operating temperature. If you're never reaching this point, you'll just see the evidence of the condensation. I get the same on my 335i, but a decent motorway run clears it up completely.
__________________
2007 E92 335i SE auto | Quaife LSD | Birds B3 ARBs | Evolve Stage 1 | Morel Hybrid 402 | Rainbow IL-W8F | JL 10W3v3 | RF 3sixty.3 | Alpine PDX-V9

seanblee is offline   United Kingdom
0
Reply With Quote
      04-26-2013, 07:43 AM   #14
bbstoke
Private First Class
 
bbstoke's Avatar
 
Drives: 2006 e90
Join Date: Jun 2011
Location: Stoke-On-Trent

Posts: 148
iTrader: (0)

Garage List
2006 318i SE  [5.00]
Send a message via AIM to bbstoke
Quote:
Originally Posted by seanblee View Post
It probably is the short journeys. The system isn't sealed, so cold damp air can get in. As the engine warms up, the moisture in the air will condense at the high points (like the filler cap), then dry out as the engine gets to full operating temperature. If you're never reaching this point, you'll just see the evidence of the condensation. I get the same on my 335i, but a decent motorway run clears it up completely.
Thanks for that :-)
bbstoke is offline   England
0
Reply With Quote
      04-26-2013, 05:07 PM   #15
old grey steve
335i E Maps Re Map, VRSF Catless DownPipes & More.
 
old grey steve's Avatar
 
Drives: 335i SE
Join Date: Oct 2012
Location: UK in Hertfordshire

Posts: 921
iTrader: (2)

Quote:
Originally Posted by Will0800 View Post
Your right, it is a venturi style filter, but beleive me, they can block! I work on these all day long and it's not uncommon for the pipes leading to the crank case block up with thick oil and oil sludge which causes the oil separator to block and causes all sorts of issues!
100% correct. I'm the service manager for an indy dealership and boy do we get through some breathers.

Best course of action for me is to always recommend its changed if in any doubt when going over the cars history when the service book or info regarding the cars history is given to me. Its a small price for the security it offers and can solve many issues the customers report. The shocking thing for many is finding cars that have been though the main dealer network that haven't had the work done and have eked the service intervals out to get max mileage between oil changes... on 320d's especially someone will pick up a nice 1500+bill if the basics are ignored.

As for this quote "speaking to one dealer the E90 does not need its breather valve replacing and should last the life of the car" my god but it shows that in many cases the front desk simply have no idea and are there to process customers and take the money... knowledge is key.. very worrying indeed as many customers would rely 100% on the info given to them by their dealer
old grey steve is offline   United Kingdom
0
Reply With Quote
      04-27-2013, 01:04 AM   #16
Frobius
Captain
 
Frobius's Avatar
 
Drives: E91 330d M-Sport / E87 118d SE
Join Date: Aug 2011
Location: Huntingdon, UK

Posts: 969
iTrader: (2)

Garage List
If its just a plastic vortex, can't you just clean it?
Frobius is offline   United Kingdom
0
Reply With Quote
      04-27-2013, 02:22 AM   #17
Dr Dave
Zummerzet Zyder Drinker!
 
Dr Dave's Avatar
 
Drives: '06 330D Le Mans Blue
Join Date: May 2009
Location: Somerset

Posts: 5,540
iTrader: (3)

Garage List
Good info Old Grey Steve
__________________
Dr Dave is offline   United Kingdom
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 08:51 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST