OVERVIEW

The Mishimoto BMW N55 Baffled Oil Catch Can is designed to reduce carbon build-up, a common issue on direct-injected N55 engines. The kit uses the proven engineering of Mishimoto's patent-pending 2-Port Compact Baffled Oil Catch Can, combining a 50-micron bronze filter with an internal baffle to separate oil from the crankcase vapors. A CNC-machined lid carries large inlet and outlet ports sized to match the inner diameter of the CCV hose, and the can mounts in line with the PCV system.

By trapping blow-by before it reaches the intake tract, the catch can defends the intercooler, intake system and VANOS system from oil contamination and helps maintain proper octane levels to reduce potential detonation. The kit ships with two direct-fit hoses that require no modification to the engine cover and one application-specific mounting bracket that places the can in an easily serviceable location. Two aluminum 3/4" barb fittings connect the hoses to the can.

Mishimoto catch cans differ from most air-oil separator systems: they are not heated, so all of the blow-by — including low-octane oil vapors and contaminated fuel vapors — is able to condense in the can. Most AOS systems drain that blow-by back into the oil pan, whereas this catch can traps it and keeps it out of the engine permanently. The can and filter are fully serviceable, and the kit carries the Mishimoto Lifetime Warranty.

SPECS

Direct fit for 2011-2013 BMW 335i / 335xi / 135i (N55)
Single can mounts in line with the PCV system on the CCV side
50-micron bronze filter separates oil from air
Patent-pending billet 6061 aluminum can, black anodized, sealed with Viton O-rings
3 oz. catch can capacity for longer service intervals
Internal air diverter increases air turbulence to improve oil separation
Internal baffle and rod for additional separation
CNC-machined lid with inlet and outlet ports matched to the CCV hose inner diameter
CNC-machined aluminum 3/4" barbed fittings
Robust, application-specific bracket mounts the can in a serviceable location
Pre-molded direct-fit hoses; no modification to the engine cover required
Helps reduce carbon build-up on intake valves and protects the VANOS system from oil blow-by
Filter and can are fully serviceable
Installs in under 30 minutes
Mishimoto Lifetime Warranty

PARTS INCLUDED

(1) Compact baffled oil catch can, black anodized 6061 aluminum
(1) Application-specific mounting bracket
(2) Direct-fit hoses
(2) 3/4" aluminum barbed fittings
(1) Internal air diverter
(1) Internal baffle and rod
(1) 3/8" NPT plug
(1) Large O-ring
Mounting hardware (Allen bolts and plastic washers)

TECH RESOURCES

Additional Parts Required

None. Mishimoto specifies no additional hardware for this catch can — the bracket, hoses and fittings supplied in the kit are all application-specific.
Ongoing service item: the can must be emptied and the bronze filter cleaned at regular intervals. Both are fully serviceable and no consumable replacement parts are required.

Installation

Mishimoto MMBCC-N55-11CBE2 Baffled Oil Catch Can installation guide (PDF) (hosted by Speed Logic)

PART NUMBER

MMBCC-N55-11CBE2 — Baffled Oil Catch Can Kit, CCV side, black

VEHICLE APPLICATIONS

Make	Model	Chassis	Engine	Years
BMW	135i	E82 / E88	N55 3.0L Turbo I6	2011–2013
BMW	335i	E90 / E92 / E93	N55 3.0L Turbo I6	2011–2013
BMW	335xi	E90 / E92	N55 3.0L Turbo I6	2011–2013