BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing
 
GetBMWParts
Post Reply
 
Thread Tools Search this Thread
      12-08-2016, 04:31 AM   #1
kimiraikkonen
Private
7
Rep
77
Posts

Drives: E90 M3
Join Date: Jun 2016
Location: San Francisco

iTrader: (1)

When have you guys changed your oil separator

Hi. Am approaching the 100K mark on my 08 E90 M3. I will be doing spark plugs soon and am thinking of changing out the oil separators (Crankcase Pressure Regulator valve...p/n 11157848155).

https://www.ecstuning.com/b-genuine-...h/11157848155/

Was wondering have people done proactive replacement of the oil separators ...and if so at what mileage...and any symptoms. - Also, how easy is it to pull the oil separators. From the diagrams, they appear connected to valve cover via 4 torx screws....and also some grommets?
Appreciate 0
      12-08-2016, 09:01 AM   #2
Leonardo629
Lieutenant Colonel
United_States
76
Rep
1,739
Posts

Drives: 2013 M3 Coupe
Join Date: Sep 2006
Location: So. Cal

iTrader: (9)

It's just the 4 torx screws to replace, but you don't need it unless you have excess oil consumption/bad idle/sluggish performance....
Appreciate 0
      12-08-2016, 09:16 AM   #3
burnrbr
Private First Class
United_States
23
Rep
139
Posts

Drives: 2011 M3 E90 DCT ZCP
Join Date: Jul 2015
Location: Jacksonville, FL

iTrader: (0)

Are they any wearable components in it? I would think just soaking them in decreaser and a good rinse would be sufficient.
Appreciate 0
      12-08-2016, 01:45 PM   #4
kimiraikkonen
Private
7
Rep
77
Posts

Drives: E90 M3
Join Date: Jun 2016
Location: San Francisco

iTrader: (1)

Quote:
Originally Posted by Leonardo629 View Post
It's just the 4 torx screws to replace, but you don't need it unless you have excess oil consumption/bad idle/sluggish performance....
Thanks Leonardo.

One more question....can I pull this directly off the valve cover WITHOUT lifting the plenum cover up? Trying to see if I can get to the oil separator without fussing with the plenum.

As for why I am considering changing the separator, am currently using 1 liter every 1.2K mi. It's been consistent ever since I bought the car at 80K miles. No leaks, stumbling, or issues with the car........but thought I'd go ahead and try replacing the oil separators when I do my spark plugs next month.
Appreciate 0
      12-08-2016, 02:11 PM   #5
Leonardo629
Lieutenant Colonel
United_States
76
Rep
1,739
Posts

Drives: 2013 M3 Coupe
Join Date: Sep 2006
Location: So. Cal

iTrader: (9)

It's connected to the plenum, so plenum needs to come off first, then 4 torx screws....new separators come with new o-rings.
Appreciate 0
      12-15-2016, 12:08 PM   #6
deansbimmer
Knee deep in projects
deansbimmer's Avatar
United_States
138
Rep
726
Posts

Drives: 2011.75 E93 M3
Join Date: Nov 2014
Location: Dallas, Texas

iTrader: (7)

Garage List
2011 BMW M3  [0.00]
2002 X5 4.6iS  [0.00]
Tip:

If you remove the separator from the valve cover, check the sealing surface before just slapping on a new one. A lot of times (especially on higher mile ones like yours), peeling off the separator will also pull off some of the valve cover coating.

If that happens you'll need to add a tiny bit of grey gasket maker to the surface if you don't want to introduce oil leaks there.

And yes. Though the separator is mostly just a series of chambers, there is a silicone rubber valve on it that can get lost or lose its proper seal which necessitates replacement. At your mileage, it's a good idea to replace while you're in there.
Appreciate 1
      12-16-2016, 04:18 PM   #7
kimiraikkonen
Private
7
Rep
77
Posts

Drives: E90 M3
Join Date: Jun 2016
Location: San Francisco

iTrader: (1)

Dean - Hi.....thanks for feedback and tips. Would you recommend perhaps using a blow dryer on low setting to soften up the gasket before trying to yank off the separator?

Oh btw, the center console I got off you worked perfectly. Thanks!

Quote:
Originally Posted by deansbimmer View Post
Tip:

If you remove the separator from the valve cover, check the sealing surface before just slapping on a new one. A lot of times (especially on higher mile ones like yours), peeling off the separator will also pull off some of the valve cover coating.

If that happens you'll need to add a tiny bit of grey gasket maker to the surface if you don't want to introduce oil leaks there.

And yes. Though the separator is mostly just a series of chambers, there is a silicone rubber valve on it that can get lost or lose its proper seal which necessitates replacement. At your mileage, it's a good idea to replace while you're in there.
Appreciate 0
      12-16-2016, 04:23 PM   #8
deansbimmer
Knee deep in projects
deansbimmer's Avatar
United_States
138
Rep
726
Posts

Drives: 2011.75 E93 M3
Join Date: Nov 2014
Location: Dallas, Texas

iTrader: (7)

Garage List
2011 BMW M3  [0.00]
2002 X5 4.6iS  [0.00]
Quote:
Originally Posted by kimiraikkonen View Post
Dean - Hi.....thanks for feedback and tips. Would you recommend perhaps using a blow dryer on low setting to soften up the gasket before trying to yank off the separator?

Oh btw, the center console I got off you worked perfectly. Thanks!
Great to hear!

To answer your question, heat probably won't do much for softening anything up since the part has seen so many high heat cycles that the o-ring and valve cover coating have literally glued themselves together.

Let us know how it goes!
Appreciate 0
      02-07-2017, 05:15 AM   #9
toolshed
New Member
Russia
1
Rep
8
Posts

Drives: E92 M3 Ind. 07/2010 E568460
Join Date: May 2016
Location: St. Petersburg

iTrader: (0)

was there any oil consumption decrease after changing separators?
Appreciate 0
      02-07-2017, 06:16 PM   #10
kimiraikkonen
Private
7
Rep
77
Posts

Drives: E90 M3
Join Date: Jun 2016
Location: San Francisco

iTrader: (1)

Quote:
Originally Posted by toolshed View Post
was there any oil consumption decrease after changing separators?
Hi. I finally got around to changing it just last week (when I did my Bank 2 throttle actuator). So will let you know if there's any change in consumption.

In case you are interested, here's the condition of one of the oil separators (after 100K mi). I didn't notice any blocked holes or ports, but definitely some buildup over time.
Attached Images
 
Appreciate 0
      02-08-2017, 10:19 AM   #11
toolshed
New Member
Russia
1
Rep
8
Posts

Drives: E92 M3 Ind. 07/2010 E568460
Join Date: May 2016
Location: St. Petersburg

iTrader: (0)

Quote:
Originally Posted by kimiraikkonen View Post
Hi. I finally got around to changing it just last week (when I did my Bank 2 throttle actuator). So will let you know if there's any change in consumption.

In case you are interested, here's the condition of one of the oil separators (after 100K mi). I didn't notice any blocked holes or ports, but definitely some buildup over time.
Hi! Thanks for the info!

Was there some unusual sound changes after shifting new seps? Maybe you had any whistling that gone then?

And how's the valve cover coatings from that Dean's tip above?

Last edited by toolshed; 02-08-2017 at 10:29 AM.
Appreciate 0
      02-09-2017, 01:54 AM   #12
kimiraikkonen
Private
7
Rep
77
Posts

Drives: E90 M3
Join Date: Jun 2016
Location: San Francisco

iTrader: (1)

Quote:
Originally Posted by toolshed View Post
Hi! Thanks for the info!

Was there some unusual sound changes after shifting new seps? Maybe you had any whistling that gone then?

And how's the valve cover coatings from that Dean's tip above?
Hi. As for sounds, didn't notice anything different. As you know, our S65 always makes interesting noises..... =)

I did change one of my throttle actuators when I did the separators, so did notice a reduction in throttle noise...but probably unrelated to the separator change.

As for the coating peeling issue that Dean described above.....a few valve cover flakes were attached to the old separator.....I just did a good wipe down and installed the new separators. The 4 bolts do hold it down quite well, so the few mils of paint that flaked off shouldn't make a difference.

Will report back soon on the oil consumption. Am hoping this improves things.
Appreciate 0
Post 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 -4. The time now is 07:54 AM.




m3post
m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, 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