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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Mon, Nov-13-2017, 09:52:43 PM   #1
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Default P54B32 Airbox Oil Separator - Who has info on it?

I am sure this is a long shot, but does anybody have any information on this OE Oil Separator (which came on the BMW AG Motorsports P54B32 Airbox -- I don't think to my knowlegde, that it came on the OE CSL Airbox)? What I am looking for is: Where it can be found, part number, if it is easily removable to dump the collected 'oil gunk', how to dump it, and how to know when its full, ect? Or is it more worth it to just make my own DIY oil separator (like in TBone's recent thread).



I've tried looking it up based on the part numbers listed in the below image, but the part that comes up on google (e39 part) seems to be the wrong orientation. I saw in a previous thread, mentioned that it may have been modified by BMW for this application? Also, how do you check how full it is so you know when to dump it?




You can see where it connects to on the back of the airbox. (Left: OE CSL Right: OE P54)



Apparently, it is not the same as the E39 M5 or the Euro S50B32 oil separators:
Quote:
Originally Posted by NZ_M3 View Post
Cheers gents but I don't think any of them are correct. The orientations are all wrong and would not bolt up correctly by the looks.

Here's the 218


788 and 789

Close but no cigar - the top vent is 90 degrees out.
Any help would be appreciated!
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Old Mon, Nov-13-2017, 10:13:16 PM   #2
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Pretty sure it's just a modified E39 part. In those pics it's pretty evident that the top portion was cut and epoxied back on.

It's not meant to be removed to drain - it's not a catch can. The drain is supposed to go to the oil pan / dipstick.
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Old Mon, Nov-13-2017, 10:21:02 PM   #3
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Quote:
Originally Posted by terraphantm View Post
Pretty sure it's just a modified E39 part. In those pics it's pretty evident that the top portion was cut and epoxied back on.

It's not meant to be removed to drain - it's not a catch can. The drain is supposed to go to the oil pan / dipstick.
Ah, I see. Thanks for clarifying. You are exactly the type of person that I hoped had information on this. SO, in theory, if I had one of those boxes, would you say that it would be better to run a catch can, verse this (since it drains back into the oil pan and essentially puts the gunk back into the system)?
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Old Mon, Nov-13-2017, 10:28:52 PM   #4
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Leighton, did you already find the thread about this from a while back?
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Old Mon, Nov-13-2017, 11:00:21 PM   #5
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Quote:
Originally Posted by TboneM3 View Post
Leighton, did you already find the thread about this from a while back?
Yea that is where I pulled the pictures from, which led me to some questions. I see now though, I misunderstood something when reading it though. I didn't catch the epoxy until it was pointed out. Strange factory solution.
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Active Group-Buys (PM if Interested): OE CSL Bootlids, Supersprint Headers/Exhaust MEGA thread, New Supersprint Oversized Twin-Piped Section 2 ...and more to come!
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Old Tue, Nov-14-2017, 12:36:52 AM   #6
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

easier to do that than to have a whole mold and line make them, they only needed a few for racing applications..
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Old Tue, Nov-14-2017, 01:32:09 AM   #7
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Pretty sure that is an E39 M5 part...modified.


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Old Tue, Nov-14-2017, 02:07:50 PM   #8
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Is this present on all p54? I would have imagined that the P54 would be dry sump and not need the separator like this.
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Old Tue, Nov-14-2017, 02:25:05 PM   #9
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

Quote:
Originally Posted by Cristov9000 View Post
Is this present on all p54? I would have imagined that the P54 would be dry sump and not need the separator like this.
They still need to vent crankcase pressure somehow

http://vsetrack.com/track_reports/20..._separator.htm
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Old Tue, Nov-14-2017, 02:34:56 PM   #10
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Default Re: P54B32 Airbox Oil Separator - Who has info on it?

I would not want anything being caught by that returned to the oil pan. I wonder if they designed it like that due to class regulations.
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Discussing P54B32 Airbox Oil Separator - Who has info on it? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)