BMW diesel M57 and M57 N engine breather 3D printed

CAD model of BMW crank case breather adapter

When converting the BMW 6 cyl diesel into other cars the air box can be removed like this

How to cut a BMW M57 air box
How to cut a BMW M57 air box

If you are having a catch tank then the exit pipe for the crank case breather seen at the rear hanging down can be cut short and then blocked off in the round turret with a washer and two pop rivets, the hose to the catch tank comes out of the round lid,

DONT FORGET TO REMOVE THE BREATHER FILTER !!! use the swirl cyclone instead of the filter.

BMW part number BMW 11127799366

replaces paper filter in the crankcase breather on BMW enginesthis fits inside the breather on top of the engine, it replaces the paper filter that always clogs up.

BUT what if you want it in a road car and still want to recycle the fumes from the crankcase well then such a problem arose in the latest conversion.

This is what we did.

cut the air box as in the picture then CAD a model of a converter to make the pipe run along the top of the exhaust manifold

looks like this in the CAD

CAD model of BMW crank case breather adapter
CAD model of BMW crank case breather adapter

then we have it 3D printed and it arrives 6 days later and fits perfect

Adapter fitted before painting
Adapter fitted before painting

the adapter bolts on , uses an big fat O ring to seal and 4 M4 bolts.

note : do not try to glue up the hole in the crank case breather the oil will get through…everytime

when the engine is in I will update with the pipes fitted.

Download 3D STL model of BMW engine breather here

By Beady

11 thoughts on “BMW diesel M57 and M57 N engine breather 3D printed”
  1. Hello
    I’m interested by your adapter.
    I’m putting M57 in an old defender and I want to cut the air intake.
    do you thinks it is possible to have the stl file? I have a 3D printer and I can print it.
    thanks so much in advanced.

    1. Hi Willy,
      yes i can let you have it,
      I am at the Abu Dhabi desert challenge , I will be back next weekend I will upload it to the blog post.
      bd

  2. Hello,

    I’m putting M57 in my old defender and i’m interested by your adapter.
    i have a 3D printer.
    is it possible to have the file ?
    thanks so much in advanced.

    1. The original one I did was using Shapeways service in their basic cheap white plastic and it worked well. If I was sprinting it on my 3d printer I would recommend Nylon 6 or something similar that would take higher temperatures that can be under the bonnet.

  3. Is it possible to buy this adapter from you? I’m searching some sort of upgrade for the oil separator.

    Greetings

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