ModBargains is proud to introduce
the Competition N54 Oil Catch Can by BSH. Adding the BSH Catch Can is one of the
simplest ways to increase the performance and longevity of your twin
turbo engine. The N54 specific Oil Catch Can features an important layer of
aluminum mesh baffling to aid in the separation of oil and air upon entering the
catch can. BSH's Competition Oil Catch Can is a must for anyone running higher
boost on their 135i/335i/535i or for anyone looking to preserve the longevity of
"Ron was very friendly and helpful. He
gave me a brief overview of why catch cans are important and told me
about some threads here on the forums. Ron processed my order very
quickly. He said that he would do his best to try to get it shipped
out today. He said that they have the BSH Catch Can always in stock,
and on top of that, he said he would walk my order over to try to
get everything process so it would ship out today!
All in all it was a wonderful
experience from start to finish. I have never received feedback so
fast from a vendor via email. (20 minutes, come on that's great!)
Ron was extremely helpful, knowledgeable and very quick. I would
recommend him and ModBargains any day."
Why Should I Get an
Oil Catch Can?
The main reason to add the BSH Oil
Catch Can to your N54 engine is the reduction/elimination of blow-by. Blow-by is
caused when a combustion in the engine forces fuel, air, and moisture past the
piston rings and into the crankcase. From there, the blow-by is released by the
crank case vents and back into the intake pipe. This occurs on all engines, but
is worse on turbo engines due to the stronger combustion. If nothing is done,
this excess “gunk” will build up in the valvetrain, turbo, intercooler, and
Why is this bad for my N54 Engine?
Blow-by coats the intercooler
piping and fins which reduces the cooling efficiency
Blow-by buildup in the intake
pipe can cause disruptions in airflow
Blow-by buildup in the turbo
diminishes the life and efficiency of the turbo
Blow-by can seep into
couplers and boost tubes causing them to pop off during high boost
The BSH Competition Catch Can
collects the blow-by and ensures you a clean and
healthy N54 engine. This a great investment
to increase the life and efficiency of your N54 twin-turbo equipped BMW.
Installation and Removal
Installation and mounting of the BSH
Catch Can is a breeze due to the laser cut mounting bracket specific for the
N54. Removal of the Catch Can for draining is also made easy by utilizing a
drain plug mounted at the bottom of the can, and two 4mm allen screws, allowing
the can to come off and go back on in under minutes. To check fluid level inside
the catch can BSH also included a billet dip stick without taking away from the
form or function of the can.
The can is a direct addition to
the factory PCV system and does not require any permanent or unsightly
modifications to your engine bay.
Sludge that you keep from entering your engine with
the BSH Oil Catch Can:
Installation Guide - Courtesy of Former_Boosted_IS @ E90post
Click here to view the original thread on E90post
You will need the following items for the
After removing the micro filter cover, cowl, and
ECU covers, you will need to remove the engine cover. It is held on by (4) 5mm
Allen head bolts.
Notice the passenger side bolt is recessed a bit,
so you will need the extension to remove this bolt.
With the engine cover removed, you have full
access to the PCV inlet/outlet for the installation of the BSH OCC.
The first item of order here is to remove the
inlet and outlet PCV connectors. The driver's side connector has a wire harness
that needs to removed first. The actual PCV connector is held on by a clip on
the side toward the nose of the car and the side toward the rear of the car. Use
a flat head screw driver to carefully pop this connector out.
The passenger side PCV connector has a square
securing clip. You will need to insert a flat head screw driver to release these
pops and remove the connector.
Here are the connectors removed from the car. Passenger side below.
Now it is time to assemble the BSH Billet
Aluminum fittings on the PCV inlet and outlet connectors. The threaded BSH
adapter goes on the passenger side connector. Insert it into the PCV connector
and then install the brass elbow into the connector.
Insert the push lock hose onto the brass fitting
and secure using the included clamp. You can cut the hose later, but this saves
you from trying to secure the clamp in tight quarters.
Next insert the driver's side BSH adapter into
the PCV connector. This has a locking tab to insure the connection remains
secure. The locking tab will slide over the lip on the PCV connector and is
secured with the Allen screw.
Now, lets get the BSH catch can and bracket assembled. Use the included screws
and washers to secure the bracket to the catch can.
We need the can installed so we can measure and
cut the hose, so that is our next order of business. The BSH OCC is mounted to
the bolt near the positive terminal under the hood. This nut/bolt simply holds
the heat shield down, so it should be easy to identify. Mount the can/bracket as
you want and lock it down.
Now you can measure the length of hose needed and
cut it using a razor blade or box cutter. There is enough hose for some slack
and it is better to leave more hose then come up short. I put the engine cover
on, so I could simulate the exact setup before marking and cutting the hose.
After you mark and cut the hose, insert each hose into the PCV inlet & outlet
fittings. It is push lock, so there are no clamps needed. Next insert the PCV
inlet/outlet back into their mounting locations and re-attach the wire to the
driver's side connecter.
Connect the hose to the catch can.
Finally, place the engine cover back on the
engine and route the hose over the side of the cover.
Button everything back up in the opposite order.
One thing to note, when you are inserting the passenger side rear bolt on the
engine cover you should use tape to hold the bolt to the Allen head socket so
you don't drop it. If you do, it is belly pan removal time that will add 30
minutes to the job.