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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > BMS Oil Catch Can Installation Fitment



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      09-12-2018, 10:27 PM   #1
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BMS Oil Catch Can Installation Fitment

I got my BMS Oil Catch Can installed recently, and the fitment of the engine cover won't fit how it used to. This is because of the thick tubes from the catch can.

Has anyone else that's installed the BMS OCC running into this problem as well? I thought about trimming the side of the engine cover to give more space for the tubes to clear, but wanted to check in here to see if anyone else had any tips or feedback on their installation.

In this picture you can see the left side of the oil-fill cap is rubbing against the plastic



In this picture you can see that the tubes are pushing up against the side of the engine cover plastic causing it to not fit correctly



This is how it was installed



This is how my engine looked without the BMS OCC installed. You can see that the oil-fill cap is a lot more noticeable

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Last edited by DYOOS; 09-12-2018 at 10:34 PM.
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      09-12-2018, 11:07 PM   #2
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Trimming is the only way if you want it to sit flush
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      09-12-2018, 11:51 PM   #3
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You need to increase the size of the hole in side of the the engine cover with either a dremel or grinding attachment on a drill.
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      09-13-2018, 12:38 AM   #4
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Quote:
Originally Posted by dpark View Post
Trimming is the only way if you want it to sit flush
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Originally Posted by Welcome to NBA Jam View Post
You need to increase the size of the hole in side of the the engine cover with either a dremel or grinding attachment on a drill.
Which part do you guys recommend trimming, the section where the tubes pass or the circular section for the oil-fill cap?

I was thinking it'd be easier to trim the section where the tubes pass and make it wider. This way the tubes don't push the engine cover out of place.
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      09-13-2018, 11:04 AM   #5
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Quote:
Originally Posted by DYOOS View Post
Which part do you guys recommend trimming, the section where the tubes pass or the circular section for the oil-fill cap?

I was thinking it'd be easier to trim the section where the tubes pass and make it wider. This way the tubes don't push the engine cover out of place.
Definitely where the tubes pass. If facing the engine, I trimmed the section closest to the front, and around the top right "corner" of the hole. You won't even notice it once you're done.

Last edited by Welcome to NBA Jam; 09-13-2018 at 11:59 AM.
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      09-13-2018, 11:50 AM   #6
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I am sorry if I hijacked OP thread. Just have a question. If I going to install sing turbo in my N55 where would OCC be relocated to?
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      09-13-2018, 11:18 PM   #7
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Quote:
Originally Posted by Welcome to NBA Jam View Post
Definitely where the tubes pass. If facing the engine, I trimmed the section closest to the front, and around the top right "corner" of the hole. You won't even notice it once you're done.
That's the route I was thinking. Now need to go buy a dremel. This is going to be fun
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      09-25-2018, 01:01 AM   #8
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Got a sweet dremel and cut about 1/2 inch from the top to the right side to give the tubes more clearance. You can cut about a centimeter or so more and the oil cap will fit better, but I'm happy with the fitment for now. Doesn't bother me nearly as much anymore. I may trim off more if I'm really ...really bored one day.



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