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*^^^^^^^^*
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Discussion Starter · #1 ·
This is the journey I would not take again. Major PITA. Oil separator is a "tricky sucker" like somebody commented. But I hope the pictures of every step of the way will make this diy a little easier for somebody else. I followed these 2 wonderful DIYs that contain everything you need to know:

The one by Lbert - http://www.bimmerfest.com/forums/showthread.php?t=323335&highlight=lbert+oil+separator

And the one by djmcmath - http://forum.e46fanatics.com/showthread.php?t=536123&highlight=

I took more pictures and included my comments making it a separate DIY. Enjoy!



























 

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In my own cars again
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1,402 Posts
Dude - Out-effing-standing job, well written and documented, another home run. Wiki-fy that beeyotch!

(and since I will be doing this some time in the next ~6 months, THANKS!
 

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Ubergeek
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15,646 Posts
Dude - Out-effing-standing job, well written and documented, another home run. Wiki-fy that beeyotch!

(and since I will be doing this some time in the next ~6 months, THANKS!
:thumbup::thumbup::thumbup::thumbup::thumbup:
 

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*^^^^^^^^*
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Discussion Starter · #5 ·
Thanks, guys!

I think I'm done with preventive maintenance after this one for a while. This one got me :)
I was also hoping to improve my low idle situation (my idle in drive is 625 rpm and I'd like to see it at 700rpm). Obviously cleaned ICV and throttle body, cheched DISA. All vacuum lines seem to be good. But alas...Must be torque converter. What ever...
 

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ZHP = Patlabor
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2,340 Posts
Great DIY! Now grab a cold one you deserve it or withthe cold weather maybe soup will work best. :)
 

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Discussion Starter · #8 · (Edited)
Very good write up!!

Question.... why didn't you take out the intake manifold??
Thank you.

For 2 reasons: you can change the separator without removing the intake manifold. It's a pain, but do-able. And second being the difficulty level of the job of removing the manifold. It would take me like 8 more hours to do that. Here is what djmcmath from Fanatics says about the job:

"Removing the intake manifold. This is a bear. You***8217;ll need to have a new gasket set and a torque wrench that***8217;s good for 11ft-lbs (you really want these torqued right), as well as a magnet-on-a-stick, some small screwdrivers, a pair of circlip pliers, and probably some other stuff. I should emphasize the difficulty here: I***8217;ve rebuilt transmissions, I***8217;ve pulled engines from cars with nothing but a floor jack and a socket set by the side of the freeway, I***8217;ve built whole brake and suspension systems from the ground up. But even with all that experience, I dorked this process up twice in a row. If this is your daily driver and you have to drive it tomorrow, and you***8217;re not entirely confident about how this process will work, maybe pulling the manifold isn***8217;t for you tonight"

So, I left it alone.
 

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Registered
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Great write up! I also opted to leave the intake in place on this one. I pull wrenches for a living and found this to be a challenging job, kudos to all who take it on. Thank you Starless!
 

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Keeping it surreal
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Excellent job, Alex....props to you, mang !
 

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Discussion Starter · #15 ·
You make it look so easy.
Man, thats a really good DIY!! This DIY makes it look easy but you can still see its a tough job!
Well, taking stuff apart is easy. It's the OS itself that's difficult to remove and even more difficult to install mainly due to it's extremely inconvenient to reach location deep under the intake manifold in a very tight space. On the photos you can not really see the depth but the the wrench with the torx bit at the end on one of the pictures gives you an idea. And you have to be positive that all the OS hoses are attached securely to it otherwise you'll have a leak and you'll need to start all over again which, trust me, you do not want to do. Not very difficult technically but requires lots of patience and attention. That's it.
 

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Sandlapper Chapter
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Thanks for this writeup...I used it extensively today in doing this on my E39...
 

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Registered
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Very Helpful! I used this last night, it makes it so much easier to have a pictorial guide.
 

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I assume this process is similar on a 1995 525i E34? Can anyone confirm? I did the vanos rebuild and broke the rubber hose that goes from vanos to cvv. I could not retrieve the distal end to attempt a reconnect. At 192K the cvv is long overdue anyway.
Great write up!:)
 
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