Mishimoto baffled catch can kit installed

Developing A N54 Catch Can Solution, Part 3: Final Design and Features

Interested in picking up our N54 oil catch can system? Check out more details on our product page linked below!

BMW N54 Baffled Oil Catch Can Kit

After selecting a catch can location and fabricating a mounting bracket, we needed to fully install the can/bracket combo and begin putting together a set of CCV lines to complete our kit.

Catch Can Lid

Before doing so, the functional prototype of our catch can lid arrived for evaluation by our team. Check it out!

Mishimoto CNC-machined catch can lid
Mishimoto CNC-machined catch can lid
Mishimoto CNC-machined catch can lid
Mishimoto CNC-machined catch can lid

We added our internal baffle system as well as our 50-micron bronze filter. Here’s a shot of the fully assembled can, ready for mock-up!

Mishimoto catch can assembled
Mishimoto catch can assembled
Mishimoto catch can assembled
Mishimoto catch can assembled

Now that we had both a prototype lid and a fabricated mounting bracket, we could install these components together and set up our lines properly.

Mishimoto catch can mock-up
Mishimoto catch can mock-up
Mishimoto catch can mock-up
Mishimoto catch can mock-up
Mishimoto catch can mock-up
Mishimoto catch can mock-up

Hose Routing and Mock-Up

We are now at the point of putting together our molded hoses, which will make this kit a direct-fit, bolt-on upgrade.

The most difficult portion of this would be snaking the line around the rear of the engine compartment, so we started our lines there. Using silicone pieces, we cut and assembled our planned shape for the hoses coming off the intake and the valve cover port.

Mishimoto catch can line routing
Mishimoto catch can line routing
Mishimoto catch can line routing
Mishimoto catch can line routing

One of our goals here was to avoid the need to trim or cut any portion of your engine cover. With some creative line routing we were able to achieve this. Once we made it around the rear of the engine, straight lengths could be used to finish off the lines.

Mishimoto catch can line routing
Mishimoto catch can line routing
Mishimoto catch can line routing
Mishimoto catch can line routing
Mishimoto catch can line routing
Mishimoto catch can line routing

As with other oil catch can kits for the N54, we do require that the stock plastic connections be separated from the stock hose. This is rather simple with help from a heat gun or hair dryer to expand and loosen the fitting from the hose. This fitting can then be attached to the lines included with our kit.

Stock fitting separation
Stock fitting separation

Below is a shot showing the inner diameter of the stock fitting (left) compared to the fittings sized for our E90-specific catch can lid (right). As noted earlier in this series, to accommodate our standard catch can we designed this new lid with the correctly sized fittings to avoid necking down the line size. This way we could prevent introducing a restriction into the system.

Stock fitting inner diameter (left) compared to Mishimoto catch can fittings (right)
Stock fitting inner diameter (left) compared to Mishimoto catch can fittings (right)

Final Assembled Kit

Check out the shots below for our final design, fully installed!

Mishimoto baffled catch can kit installed
Mishimoto baffled catch can kit installed
Mishimoto baffled catch can kit installed
Mishimoto baffled catch can kit installed

Project Conclusion

Our initial catch can offering is complete! The features are noted below.

  • E90-specific catch can with internal baffle and 50-micron filter for optimal separation
  • Direct-fit molded rubber lines requiring zero modification to your engine cover
  • Easily accessible can location for quick servicing
  • Complete bolt-on catch can solution
  • Lifetime Warranty

Feel free to follow up with any questions or comments!

Thanks

­­–John

Interested in picking up our N54 oil catch can system? Check out more details on our product page linked below!

BMW N54 Baffled Oil Catch Can Kit

6 thoughts on “Developing A N54 Catch Can Solution, Part 3: Final Design and Features”

      1. Hey Nick,

        Thanks for checking out our post! We do not intend to dyno test this particular product, nor do we expect to see any power gains with the catch can installation. This particular component should be seen as more of a supporting modification or a modification in terms of preventative maintenance. We do expect this product to extend the service interval for intake valve cleaning.

        Thanks again for checking out our blog!

        -John

    1. Nick,

      It is certainly possible. We have been working on a variety of projects for the 3-series E46 (non-M models) including an aluminum radiator, aluminum expansion tank, intake system, and intake boots. A catch can is certainly on our radar as a potential future project. The DI engines typically have far greater valve buildup compared to a port injection model, which is why we have been targeting those vehicles for our initial kits.

      Thanks for the recommendation!
      -John

  1. Aloha John,

    I just cleaned the carbon off my intake valves on my 2008 BMW 335i with the compressed air and walnut shells recently.

    Lately I have been researching oil catch cans on the market and found the baffled Mishimoto oil catch can kit for my 3 series BMW to be the best option available.

    HOWEVER in my humble opinion, what would make your “Baffled Oil Catch Can” (BOCC) an Outstanding 5 Star product is if it had an OIL DIP STICK!

    Is there a way your Engineers can incorporate or can you custom make me a BOCC with an oil dip stick?

    It’s kind of a pain in the okole, and not to mention dirty and time consuming to check any OCC oil level. But with an oil dip stick anyone can check the oil level within 30 seconds!

    I promise you if you add an oil dip stick to your BOCC, your sales will greatly increase as the only BOCC can worth buying especially within the BMW community.

    I have plenty of friends that own BMW’s here in Hawaii that through word of mouth and the Internet would buy a Mishimoto BOCC with an oil dip stick.

    So I humble ask, can you please custom make me a BOCC for my BMW with an oil dip stick?

    1. Hey Stan,

      Thanks for taking a look at our blog and for taking the time to comment. Feedback is always welcome and definitely helps shape changes to our products and/or additions to our product line.

      A dipstick or sight tube for our baffled units has been one of the primary requests from existing and potential customers. This feature was not included in our existing design for aesthetic purposes. That being said, we are currently evaluating our entire catch can lineup with the intention to either improve our existing offerings or bring to market something new. This feedback definitely adds to what we currently have, and will be very helpful. Keep an eye on our blog for the next few months and you will likely see some information about catch can projects.

      Unfortunately a custom project is not exactly something we can tackle at the moment. That being said, a dipstick inclusion is very likely on our upcoming project.

      Thanks again for the feedback!
      -John

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