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post #1 of 145 (permalink) Old 07-10-2018, 12:32 PM Thread Starter
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Default Oil Catch Can Thread

I'm not going to pretend to be an expert in all things catch can related, but I've read enough to be educated on the subject. The more I've researched, the more I've found running an oil catch can (OCC) is warranted for a Gasoline Direct Injection (GDI) vehicle.

𝐓𝐡𝐞𝐨𝐫𝐲 𝐨𝐟 𝐨𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧:
In port fuel injection, fuel is sprayed across the intake ports, which cleans oil off the valves. However, in a GDI system, fuel is sprayed directly into the combustion chamber. Hence, any contaminants accumulating on the ports/valves or in the intake tract are not cleaned by simply getting on the skinny pedal. In fact, spirited driving is going to amplify the issue, as it will create more pressure and in turn create more oil vapor. All of the oil vapor being recirculated is going to travel through the intake, and because of condensation and friction about the intake/vapor interfaces, will end up gunking up your intake valves and manifold. So, to prevent this "blow-by" vapor to accumulate in the intake tract, the vapor must be condensed and stored before it gets to the intake... AND THIS is where the catch can comes in.

From the Positive Crankcase Ventilation valve or the Breather Hose to the intake are hoses where all this vapor travels through. Placing an area for that vapor to accumulate is what you'll be doing.

In comes the OCC. You can do a few different things. I ordered one OCC, but because of the size limitations of the Q50 engine bay, I was unable to install it. I then purchased a cheap ebay 400mL OCC. But the moment I got to actually looking at it, I realized this was going to leak and be an all-around headache. Additionally, there was no access to the internals of the OCC, and since it was not baffled (because it was a cheap eBay POS) and it didn't have a way to put a filter material in, it wouldn't really do a good job at condensing oil vapor.

This brings me to the different designs. You can either use a baffled OCC (which is what I will be installing in the next post I am reserving on this thread), or you can create a "heat sink" in an empty cheap canister which will essentially do the same thing, which I will discuss now.

𝑫𝑶 𝑵𝑶𝑻 𝑼𝑺𝑬 𝑺𝑻𝑬𝑬𝑳 𝑾𝑶𝑶𝑳! 𝑰𝒕 𝒊𝒔 𝒏𝒐𝒕 𝒕𝒉𝒆 𝒔𝒂𝒎𝒆 𝒕𝒉𝒊𝒏𝒈 as a stainless steel scrub pad.

So there's two ways I know of to accomplish a functional OCC design.

First, you can go down and get an air compressor filter from Home Depot/Lowe's/True Value/Harbor Freight, some hose, and some barbed fittings to put it all together (most cost effective).





Or, I personally like a little bling, so you can also get an eBay OCC. These OCCs come without baffling, so we need a material to act as a heat sink to condensate the vapor for collection. In this case, you can place a stainless steel scrub pad between the inlet and outlet of the OCC. The oil vapor will drop in temperature when it comes in contact with the cooler steel mesh and condensate into the OCC. If you're worried about sucking bits of the stainless steel pad into your intake, simply put a check-valve fitted with a stainless steel screen material inline between the OCC and the intake. After a couple of years of running this type of setup, I am not slightly concerned about this... but you may choose to be more cautious. The one I saw on the first search actually comes with the stainless steel scrub pad as a "filter" which is exactly what it does.

DO NOT USE STEEL WOOL! It is not the same thing.



The biggest thing about the OCC is making sure you empty it at oil change or periodically between. If it gets full, where do you think that oil will end up? I'll give you a hint, not where you want it to go... XD

Additionally, this is a good place to check for contaminants in your oil. If you see metal flakes, excessive dirt, fuel, water, bunnies, whatdafukeva. If you have things that shouldn't be in your oil, then your next step is to figure out why, or take it to the dealer and say, "My oil sparkles like an 18 year old Vegas hooker."

For you engineer/physics nerds, if you care to see the math behind running an OCC:
Excellent PDF for OCC efficiency
Journal article on the condensation of a vapor

Local parts were mildly difficult to locate, so I have used the best of a limiting situation and what NAPA/Home Depot/True Value had to offer. The correct parts are on order, but I really wanted to get this together to test the functionality. If you go the same route I did, and don't buy parts that you are going to end up not using (this is how 75 year old men have every fucking part you could ever want in their garage):

Yep... I actually said that.

Last edited by Administrator; 09-19-2018 at 12:37 PM. Reason: Updated
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post #2 of 145 (permalink) Old 07-10-2018, 12:33 PM Thread Starter
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Updated as of 19 September 2018

Parts:
My car: 2017 Q50 RS.

𝑀𝑖𝑠ℎ𝑖𝑚𝑜𝑡𝑜 𝑏𝑎𝑓𝑓𝑙𝑒𝑑 𝑂𝐶𝐶 $115 𝐴𝑚𝑎𝑧𝑜𝑛 MMBCC-MSTWO-BK OCC

𝑉𝑎𝑙𝑣𝑒 𝐶𝑜𝑣𝑒𝑟 𝐵𝑟𝑒𝑎𝑡ℎ𝑒𝑟(&#119904 #8 𝑎𝑛𝑑 #4 𝑓𝑟𝑜𝑚 𝑑𝑖𝑎𝑔𝑟𝑎𝑚:
3' of 1/2" ID hose $15 True Value
1' of 5/8 ID hose $7 NAPA
(2x) 5/8" to 1/2" reducing couplers $4 at Home Depot

𝑃𝐶𝑉 𝑉𝑎𝑙𝑣𝑒 𝐵𝑙𝑜𝑤-𝑏𝑦 𝐻𝑜𝑠𝑒 #14 𝑓𝑟𝑜𝑚 𝑑𝑖𝑎𝑔𝑟𝑎𝑚:
3' of 3/8" ID hose
2' of 1/2" ID hose thanks Anne! XD
3/8 to 1/2 reducing coupler

𝑀𝑜𝑢𝑛𝑡 𝑢𝑠𝑒𝑑:
1/2" self-tapping screws $unknown (I have a bunch of these laying around)
90 degree corner angle plate $1 True Value

𝐒𝐢𝐳𝐞𝐬: 𝐒𝐢𝐳𝐞𝐬:
Breather Blow-by Hose - 5/8"
PCV Hose - 3/8"
Mishimoto OCC IN/OUT lines - 1/2"

𝐎𝐯𝐞𝐫𝐯𝐢𝐞𝐰:
Go from the Breather to your 5/8" hose => reducing coupler => 1/2" hose => OCC IN
Go from Breather Hose => reducing coupler =>1/2" hose => OCC OUT

𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐨𝐧𝐬:
If you use the Mishimoto OCC, you're going to have an in and out. Engine side goes to the in and blow-by hose connects to the out. If you get in there and get confused, just remember, your motor is a huge metal thing and the hose is made of rubber.

𝐌𝐨𝐮𝐧𝐭𝐢𝐧𝐠:
It's a tight squeeze.There is a solid black bracket in front and just above the breather valve/hose. I screwed through my 90 degree angle bracket into that bracket with the self-tapping screws, then attached the OCC bracket to the angle bracket using 2 more self-tapper screws. It was not lining up properly, so I used the vice and turned the 90 degree angle bracket into a 50-60 degree bracket then reattached. Where it is mounted makes unscrewing the bottom to empty a PITA, you'll be better off unscrewing it from the bracket, removing the hoses, emptying and reinstalling.

𝐂𝐨𝐧𝐜𝐥𝐮𝐬𝐢𝐨𝐧𝐬:
I've only had this installed for about a week or so, I haven't checked to see if it has collected anything. The blowby hose was coated with oil, so my guess is that the OCC will work as advertised.

𝐍𝐨𝐭𝐞𝐬:

𝐐𝐮𝐨𝐭𝐞𝐝 𝐋𝐚𝐧𝐜𝐞 𝐟𝐫𝐨𝐦 𝐀𝐌𝐒 (𝐝𝐢𝐚𝐠𝐫𝐚𝐦 𝟏 𝐥𝐚𝐛𝐞𝐥𝐞&#119837:

𝘏𝘰𝘴𝘦 #10 , 𝘥𝘰𝘯’𝘵 𝘮𝘦𝘴𝘴 𝘸𝘪𝘵𝘩.

Hose #14 is the PCV hose, do not VTA, make sure this routes back to the intake manifold and use a separator if you wanted.

Hose #8 and #4 route back to the compressor inlets, passenger side in the coupler and drivers side into a fitting on the turbo. These can be VTA but is recommended to route back to the intakes. You can use a separator in each circuit to keep the oil out.

2: Shaun has installed Vent to Air (filtered) OCCs on the breathers referenced above, which works well.
PCV VALVE OCC MUST BE A SEALED CAN, VTA = No Joy.

3: DO NOT USE PVC couplers. Attached in the pictures is the first Home Depot reducing couplers I used. They are blue and I am lucky they didn't completely melt.

Link to original: https://www.infinitiq50.org/…/123703...-can-thread.h…

Link to PDF (Courtesy of Lordie Lord Lord): https://drive.google.com/…/1jFrWDuGn...zVX6E80s…/view

𝐃𝐢𝐬𝐜𝐥𝐚𝐢𝐦𝐞𝐫:
I am simply providing a overview of what I did. If you get in there and accidentally **** **** up, that's on you.

𝐃𝐎𝐍'𝐓 𝐌𝐄𝐒𝐒 𝐖𝐈𝐓𝐇 𝐇𝐎𝐒𝐄 #𝟏𝟎 (𝐢𝐭'𝐬 𝐢𝐧 𝐭𝐡𝐞 𝐛𝐚𝐜&#119844

𝐃𝐨𝐧'𝐭 𝐯𝐞𝐧𝐭 𝐭𝐨 𝐚𝐢𝐫 𝐨𝐟𝐟 𝐭𝐡𝐞 𝐏𝐂𝐕

𝐃𝐨𝐧'𝐭 𝐭𝐫𝐲 𝐭𝐡𝐢𝐬 𝐢𝐟 𝐲𝐨𝐮 𝐬𝐮𝐜𝐤 𝐚𝐭 𝐭𝐡𝐢𝐧𝐠𝐬 𝐥𝐢𝐤𝐞 𝐝𝐢𝐫𝐞𝐜𝐭𝐢𝐨𝐧𝐬.



[/quote]
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Yep... I actually said that.

Last edited by Scary; 01-28-2019 at 10:24 AM. Reason: Installed to breather side, PCV side coming soon.
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post #3 of 145 (permalink) Old 07-10-2018, 01:08 PM
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Good thread and content. Looking forward to your solution.

Here are some videos related to GDI and catch cans.



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post #4 of 145 (permalink) Old 07-10-2018, 04:35 PM Thread Starter
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Quote:
Originally Posted by JohnInNH View Post
Is this gust the wrong pic?
Hah, this should have been your first question.

Yes.

Yep... I actually said that.
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post #5 of 145 (permalink) Old 07-10-2018, 07:45 PM
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Quote:
Originally Posted by Scary View Post
Hah, this should have been your first question.

Yes.

OK.. thanks. Putting it in our cars makes a lot of sense, especially if you are going to tune it. (More cylinder/ring pressure & possibly of more blowby).. I deleted my post as the pic is changed
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post #6 of 145 (permalink) Old 07-13-2018, 11:22 PM Thread Starter
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Here's what I know so far, the hose coming off the PVC is 5/8 ID. The fittings on the Mishimoto OCC are 1/2". Brass reduction barbed couplers in those sizes are hard to come by locally. I have PVC and will keep a close eye on it, but I should be fully installed tomorrow if my wife let's me break away before the birthday party for the toddler.

However, this new OCC is small, so no problem finding a mounting solution me thinks.

Yep... I actually said that.

Last edited by Scary; 07-15-2018 at 10:26 PM. Reason: Pics or it didn't happen.
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post #7 of 145 (permalink) Old 07-15-2018, 12:38 AM Thread Starter
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Okie dokie... Installed it, I will do a detailed write up sometime tomorrow. Because my hands fucking hurt.

Self tapping screws won the day, this thing was a PITA to install. But a quick drive +logs didn't show anything bad happening. I'm not 100% sold on the mounting solution... Only one screw holding it in place for now. But I'll be testing and measuring the amount of oil separated and updating as I learn more.
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Yep... I actually said that.

Last edited by Scary; 07-15-2018 at 10:25 PM.
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post #8 of 145 (permalink) Old 07-15-2018, 11:29 AM
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In for results.

Thanks for the pioneering effort.
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2018 Iridium Blue, AWD, Q50 Red Sport w/ Sensory and ProACTIVE packages and an illuminated grille emblem that is no longer anything special as my neighbor's lowly Chevy truck has one too.
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post #9 of 145 (permalink) Old 07-15-2018, 07:56 PM Thread Starter
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Thread updated with quick write-up. Ask questions if needed.

Yep... I actually said that.
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post #10 of 145 (permalink) Old 07-15-2018, 10:47 PM
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Looks like a good creative install. Wouldn't this engine require two OCC's thought? One for each bank?
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