How to install a catch tank and why? Porsche Cayman 987.2 3.4 - best mod to reduce carbon build-up

Oil Catch tank/can install on this Porsche Cayman S 987.2 2009-2012. The standard air oil separator, AOS, isn't enough to prevent the carbon building up on the back of the inlet valves. Installing a catch tank or can, helps to further reduce the oil deposits which stick inside the inlet ports and on the valves.

I have installed an ebay special mishimoto knock off, it basically looks exactly the same at a fraction of the price. This didn't come with any pipework so I had to purchase this separately. I got 1m of 10mm hose (internal diameter) and 0.5m of 16mm hose (ID) and you'll need 2 pipe reducers to join the two, 16mm-10mm hose. You will also need several hose clips and make some sort of bracket up to really mount it properly.

In all, this cost me less than $30 for the lot and its worth it.

Having direct injection means these deposits are not cleaned off in normal operation and after a while this carbon build up can cause misfires and reduce performance.

Having cleaner air being recirculated means a better/cleaner air/fuel ratio which will also mean you will get the maximum performance out of your engine.

Now you may be thinking, "do you need to recirculate the blow buy gasses?" Well due to emission laws, yes you do, but also having a positive crankcase ventilation also reduces oil leaks. If the crankcase pressure started to build up, it would need to vent it off somewhere, and the oil seals would be an easy place.

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