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

  1. #31
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    Any updates after the install?

  2. #32
    Work in Progress sm1ke's Avatar
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    Quote Originally Posted by Silly Wabbit View Post
    Any updates after the install?
    Just checked it a few mins ago. I've gone through at least 3 tanks of gas now. I haven't touched it since reinstalling the baffle at the end of May.

    Still bone dry. No idea what I'm doing wrong. I have to wonder if I've plumbed the can incorrectly, or if the spot I've mounted the can plays some part. Chris_Top_Her suggested mounting the can lower in the engine bay, but there's nowhere to mount it so that I've got easy access from under the hood. I may just have to mount it lower and access it from underneath when I need to check/dump it.

    SW, could you take a look at how I've plumbed my can on the first page and let me know if I made a mistake somewhere?

  3. #33
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    Your plumbing seems fine to me. Have you try removing the hose to see if it's dry inside too? My can is to the left of the upper coolant hose and the plumbing in and out are about 12". I get a constant 20ml every 4k

  4. #34
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    Like Sm1ke, I also checked on my different catch can install and with the same result. It was bone dry with a hint of oil smell. My mounting point is next to the fuse box which is higher than the engine. I'm wondering if the blowby has enough force to make it through the hose and all the way up to the catch can.

  5. #35
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    Quote Originally Posted by Cx-9 Guy View Post
    Like Sm1ke, I also checked on my different catch can install and with the same result. It was bone dry with a hint of oil smell. My mounting point is next to the fuse box which is higher than the engine. I'm wondering if the blowby has enough force to make it through the hose and all the way up to the catch can.
    Yes, you've mentioned the location as a possible problem before and it seems that that might be the case. I think that I just didn't bother to try a different mounting spot because I read a paper that someone wrote on oil catch cans, and in it they stated that having the catch can mounted higher than the engine was best. At this point, I think I'm going to try temporarily mounting it to where Silly Wabbit has his can mounted, just to see if I get anything. I'll post when I make the switch, what my mileage is, and an eventual update when I find some time to pop the hood. Cheers fellas!
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  6. #36
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    Hi sm1ke, I wanted to installed a OCC on my KE Cx5 diesel and found you post. Is your can still empty? Cheers

  7. #37
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    Quote Originally Posted by circlerectangle View Post
    Hi sm1ke, I wanted to installed a OCC on my KE Cx5 diesel and found you post. Is your can still empty? Cheers
    Hi, yes it was still empty at the time, but I have just recently moved the location. Here is a photo of where I have relocated the catch can. Please note that I have a Corksport intake installed, so this mounting solution may not work for you. If I did not mount it here, I would have mounted it on the large coolant hose in front of the engine. I'm hoping the new location addresses the issue, but I will report back in 1000-2000 kms.



    Also, I'm not sure how similar the diesel engine is to the 2.5 Turbo, so please keep that in mind.
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  8. #38
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    Ive see people putting the catch can hose there, not the PCV. It does a good job tho. I just bought the can, will install it this weekend and get you updated.

  9. #39
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    Quote Originally Posted by circlerectangle View Post


    Ive see people putting the catch can hose there, not the PCV. It does a good job tho. I just bought the can, will install it this weekend and get you updated.
    That ADD W1 can is basically the same can that I have, it just has slightly different labeling and a brand name. Do you know what ports the lines are connected to?

    Also, what intake elbow is that? Looks sharp.
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  10. #40
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    Quote Originally Posted by sm1ke View Post
    Hi, yes it was still empty at the time, but I have just recently moved the location. Here is a photo of where I have relocated the catch can. Please note that I have a Corksport intake installed, so this mounting solution may not work for you. If I did not mount it here, I would have mounted it on the large coolant hose in front of the engine. I'm hoping the new location addresses the issue, but I will report back in 1000-2000 kms.
    Just to follow up on this, it has been 4000 km since relocating the OCC. I just checked it and it is still dry. I'm going to trim the tubing to see if that makes any difference, but I'm doubtful that it will.
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  11. #41
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    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?

  12. #42
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    Quote Originally Posted by BRnPA View Post
    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.
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