Guide: 2nd Generation CX-9: Aftermarket oil catch can installation

V
2018 CX-9 GT
I've been reading this thread with the anticipation of instilling a catch can on my '18 GT, but it seems that there is a small amount (or none as in sm1ke's case) of oil vapor being reclaimed. In reading the Mazda threads, such as this one, echoes what's being discussed above: Drive your car to operating temperatures and do get on it every once in a while. That being said, is the catch can really necessary if we drive like Zoom Zoom? :)
 

sm1ke

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Canada
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'18 CX-9 Signature
I've been reading this thread with the anticipation of instilling a catch can on my '18 GT, but it seems that there is a small amount (or none as in sm1ke's case) of oil vapor being reclaimed. In reading the Mazda threads, such as this one, echoes what's being discussed above: Drive your car to operating temperatures and do get on it every once in a while. That being said, is the catch can really necessary if we drive like Zoom Zoom? :)
Honestly, we won't know for sure unless we get some 2nd gen CX-9 owners with 100k to do a valve inspection, and report their style of driving and their location.

With that said, some of the cars that have had serious carbon build-up issues (some Audis, 2nd generation Lexus IS250s, etc.) have shown symptoms starting as early as 30k. These symptoms usually manifest as excessive engine vibration, poor gas mileage, and decreased performance. As long as your car isn't exhibiting these systems, there's nothing to worry about. Personally, I owned a 2nd gen IS250 for a few years and never had any issues. It had 90000 miles when I sold it, and it didn't have any carbon build-up symptoms. I drove it year round, my drives were always long enough to get the engine up to operating temps, and I did let the car stretch its legs every once in a while.

With my CX-9, I drive it like the IS250. It's driven year round, my drives are always 10-30 mins long, and I like to push the engine now and then (probably more often than I should, lol). The catch can, in my case, was just a preventative measure. I honestly believe now that it has to do with the bronze sintered filter that is included on some catch cans, but not on mine. I can't think of any other reason for why I'm not collecting any blow by.
 

sm1ke

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'18 CX-9 Signature
https://corksport.com/mazda-6-2.5l-turbo-oil-catch-can-kit.html

It seems that there is a problem in the place where we installed, and the pipe that should be near the firewall needs to be modified.
Thanks linxiabing, the installation is indeed quite different. I'm going to purchase more supplies for this installation and try to tackle it on a warm day, then report back and update as necessary.

Just a note - this installation does appear to be correct by all accounts, as the OCC is meant to go between the PCV valve and the intake manifold port. It seems to work for other owners, maybe just not for me. But I will try this alternative method. At the very least, it looks like doing it this way will prevent any blowby from ever making it into the intake manifold via the PCV valve.
 
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V
Mazda CX-9 Signature
https://corksport.com/mazda-6-2.5l-turbo-oil-catch-can-kit.html

It seems that there is a problem in the place where we installed, and the pipe that should be near the firewall needs to be modified.
That's definitely interesting. It seems complicated for sure. Can someone explain to me the engineering behind this install route? And that seems excessive for what it caught with 500 miles. You must have to drain it multiple times between oil change
 

sm1ke

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Canada
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'18 CX-9 Signature
That's definitely interesting. It seems complicated for sure. Can someone explain to me the engineering behind this install route? And that seems excessive for what it caught with 500 miles. You must have to drain it multiple times between oil change
It does seem excessive. They mention that the first time the catch can is installed this way, it catches an excessive amount of blowby, and that it should be changed shortly after install. Then they say that the can should be changed every 3000 miles or few months.
 

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