BMS Oil Catch Can Install - Review

[nicoz]

Originally Posted by flzrider

I installed mine this past weekend. The install went smoothly. The only slow part was removing the strange hose connections on the OEM tube.

Also, I found it easier to remove the 45° elbow on the intake tube and then install the u-bend hose instead of installing it while in place.

I cut the tab on the plastic engine cover. It's so far back there that no one will ever see it, and it really does make a huge difference as far as room goes.

Here are some pics:

Do you think it will still fit even without cutting the engine cover?
Do you think you will need to take to cowl out again to empty the can?

Thank you

[flzrider]

Originally Posted by nicoz

Do you think it will still fit even without cutting the engine cover?
Do you think you will need to take to cowl out again to empty the can?

Thank you

It's possible it will fit without the tab being cut off, but it would probably require alot of adjusting of the hoses to get it to land in just the right spot. And even then I think the tab would be putting some amount of pressure on the hose.

I am hoping I will be able to fit my hand in there to remove the bottom can, but I am sure it will be very difficult, especially when it is full of oil. Removing the cowl isn't that bad, but I would worry that the screw threads are not made to handle the constant in and out.

[nicoz]

Ok... thanks... mine's going in very soon!

[steve457]

I was able to install mine without cutting the engine cover. The hose is pinched just slightly, but not enough really to be concerned about IMO. It was a bit difficult getting the hoses positioned correctly in order to get the catch can in place, but it definitely can be done. I felt if the J-hose was about 1/2" longer it would make it easier to position the catch can. If you were to trim the engine cover than the hose is plenty long, but with the cover untrimmed it is a tighter fit.

Here's a picture of my install.

[nicoz]

Originally Posted by steve457

I was able to install mine without cutting the engine cover. The hose is pinched just slightly, but not enough really to be concerned about IMO. It was a bit difficult getting the hoses positioned correctly in order to get the catch can in place, but it definitely can be done. I felt if the J-hose was about 1/2" longer it would make it easier to position the catch can. If you were to trim the engine cover than the hose is plenty long, but with the cover untrimmed it is a tighter fit.

Here's a picture of my install.

Thanks for the input!!
Any tips on the install?

[steve457]

Here are some tips that may or may not help.

1) In order to remove the clips on the wires to the sensors (on shroud) you need to apply a fair amount of force. They have barbed type teeth that bite into the plastic, so the only way to remove them is really to pull them back towards you hard. I had originally cut the tape holding the wire and only later realized that I could have just pulled the clip off all together. Fortunately I had some gaffer tape laying around so was able to retape the wires back on just like new.

2) The instructions say to connect the catch can to the hoses and remove the air inlet line so that you can swing the can into place. I found you don't really need to remove that air inlet line as you can just push the hoses on the catch can with it pretty much in place.

3) Don't drop any tools into the engine bay! I managed to drop the catch can clip and had to remove part of the bottom pan in order to retrieve it. I also managed to drop a socket with extension attached that to my surprise did not end up landing on the ground. I couldn't find the lost socket for 1/2 hour or so and ended up having to jack up the car and remove the entire lower pan. A total waste of time that could have been avoided!

[Bdh821]

So I have the whole catch can installed and was going to put back the air cowl and noticed it was sticking up. Took off the cowl and noticed the screw heads that hold the catch can to the bracket are hitting it. Is anyone else having this issue?

[Drace1]

Originally Posted by Bdh821

So I have the whole catch can installed and was going to put back the air cowl and noticed it was sticking up. Took off the cowl and noticed the screw heads that hold the catch can to the bracket are hitting it. Is anyone else having this issue?

Nope no issues with that on mine.

[robertm]

Originally Posted by steve457

Here are some tips that may or may not help.

1) In order to remove the clips on the wires to the sensors (on shroud) you need to apply a fair amount of force. They have barbed type teeth that bite into the plastic, so the only way to remove them is really to pull them back towards you hard. I had originally cut the tape holding the wire and only later realized that I could have just pulled the clip off all together. Fortunately I had some gaffer tape laying around so was able to retape the wires back on just like new.

2) The instructions say to connect the catch can to the hoses and remove the air inlet line so that you can swing the can into place. I found you don't really need to remove that air inlet line as you can just push the hoses on the catch can with it pretty much in place.

3) Don't drop any tools into the engine bay! I managed to drop the catch can clip and had to remove part of the bottom pan in order to retrieve it. I also managed to drop a socket with extension attached that to my surprise did not end up landing on the ground. I couldn't find the lost socket for 1/2 hour or so and ended up having to jack up the car and remove the entire lower pan. A total waste of time that could have been avoided!

Oh Gawd, good humor.

Were we separated at birth? The trials and tribulations of the home mechanic. I respect your honesty and relate to your mishaps

[Franklin Joseph]

lol...i dropped a tool in-between the engine and intake manifold...good thing i had the snake magnet to get the tool out.

drace1, maybe you could move the bracket further down the brace to clear the cowl?
I didnt have any issues with fitment, but it was pretty darn close.

[BMW86]

Installed mine last night, just in time for a track day next week! Also gave my FMIC a very good clean which will go back in soon. Highly recommended after doing this, so much gunk came out. I couldn't put the engine cover back on so I'll need to modify it sometime very soon if I get time. Overall, very happy with the fitment, looks very stealth. Hope to catch some oil soon Pics to come...

[bdaddylo]

We installed Franklin's catch can on my 1M last night and had no fitment issues and didn't have to cut the engine cover. We did have to play around with the can location in order for the wind cowl to fit.

[BMW86]

Trimmed back my engine cover, fits perfectly now. Haven't tried putting the cowl back on as I usually run without it.

[Keanu111]

Hey how do you take off that top piece in the engine so I can access all this?
Thanks!

[Franklin Joseph]

there should be a diy somewhere on removing the cowl.

Here's a quick guide.

Remove 2 covers on each end. 6 8mm bolts that holds the cabin filter. 2 8mm bolts that hold the cowl. Remove 1 or 2 sensors on the cowl. there's a wire harness that's clipped onto the cowl up front, remove those. Gently pull the cowl out, it touches the brake reservoir.

[ajshanny]

For those of you who have had the can on for a while, is it catching oil? If so, how much?

[bdaddylo]

Originally Posted by ajshanny

For those of you who have had the can on for a while, is it catching oil? If so, how much?

Yes, it is catching oil. After 5,000 miles the catch can caught about a tablespoon of oil. The catchings appear to be a little thinner than the engine oil and the color is black.

[TheRuss]

Sorry to revive an old-ish thread, but I tried to install the BMS OCC on my 135i and failed miserably.

Got the cowl off fine, but couldn't for the life of me get those stupid clips off at either end of the stock hose. What's the trick to doing it? I was using small screwdrivers to wedge both clips up, then htrying to pull the tube off, but it wouldn't budge. In the end I had to give up as I ran out of light. It didn't help that I lost the screwdrivers down into the bottom of the engine bay 3 times and had to get the jacks out to retrieve them. Grrrr.

[TheRuss]

Anybody? Sorry to keep on, but. Really wanna get my OCC installed, so any tips on getting those clips off the stock hose would be great. Spent ages trying to no avail last time.

[Smiley1175]

Is anyone getting any good results with their unit?
A tablespoon of oil over 5000 miles doesn't sound like much at all

[Ian///M]

Originally Posted by Smiley1175

Is anyone getting any good results with their unit?
A tablespoon of oil over 5000 miles doesn't sound like much at all

IMO this is a must mod for any 1M or tuned N54. I had about 10ml of oil in my IC after 5000km

[robertm]

Originally Posted by TheRuss

Anybody? Sorry to keep on, but. Really wanna get my OCC installed, so any tips on getting those clips off the stock hose would be great. Spent ages trying to no avail last time.

I remember fighting something or another when I installed mine. Let me know which one you are talking about from the install directions. Ill go and look on my car this weekend and let you know.