Thread: Advised not to fit catch can

I have a post up about catch cans in the engine bay. Is a catch can important on a modern turbo diesel? Good article
I was researching catch cans as I was considering fitting one to the 2.4 Puma. I e-mailed Mann-Hummel regarding their Provent2 unit. They advised me AGAINST fitting it as an after market installation. I know people do fit catch cans and I presume Mann-Hummel's reasoning against self installation will stand for all units not just their own. Here is the e-mail.

Thank you very much for your interest in our products
ProVent² is basically feasible for Diesel engines but it needs to be adjusted to the specific requirements of each engine type. Different parameters influence the performance and could, if applied wrong and not validated correctly, severe damage to your engine. Therefore we only supply this filter type directly to OEM´s and go through several development loops together with them. I am sorry to give you this negative feedback but in your case we are not able to support your inquiry.
Mit freundlichen Grüßen
Best regards
Dominic Burgstahler
Product Management HD&I Liquid filters
So it is not just a matter of buying one, conjuring up the pipework and fixing it in place. Other factors need to be taken in to consideration. Seems to me that if factory fitted the ECU will be notified and the catch can integrated into the system

I've decided not to bother with a catch can.