Catalytic Converter Break In- A Crucial Forgotten Step

Catalyic Converter Break InBuying a new catalytic converter is probably one of the least fun ways to spend money on your European car.  In states that allow it, emissions systems are often the first to get torn off for better “performance”, although in generally I think people just prefer a smelly exhaust pipe.  Regardless, if you live in a state that does emissions testing, or are just the type of person to support the planet Earth, you will find yourself needing to perform a catalytic converter break in procedure at some point in time.

To read more about why you may need a new cat, check out this article: [catalytic converters]. Luckily the catalytic converter break in is an easy thing to do and only takes a few minutes, and if you are having the work done at a shop hopefully the service techs are familiar with the process.  Neglecting the catalytic converter break in can lead to premature failure of the delicate components inside, which will be a huge drag on yo

Catalytic Converter Break In

OEM catalytic converters can be fairly expensive, don’t ruin them on your first drive!

ur wallet.

Catalytic Converter Break In

  1. Start up the engine and let it idle until it’s warmed up.  Do not rev it.
  2. Once the engine is warm, or after around 5 minutes, increase the RPMS to around 2500 for around 2 minutes.
  3. Return to idle and turn the engine off.
  4. Let the car sit until it’s fully cool.

That’s it!  By doing this procedure, you slowly bring the brand new components up to temperature, without exposing them to high heat or gas pressure.  This allows all the materials to expand and set, including the ceramic substrate and matting which is installed in a compressed state.  During the partial throttle stage, you are effectively burning off the binding that keeps the matting compressed.  If you install a new cat and immediately gun it out of your driveway into the street, you can dislodge these components and cause them to break free, rattling around in the shell and reducing the overall effectiveness of your new catalytic converter.


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