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Discussion Starter · #1 · (Edited)
I was thinking of adding an oil catch can to my car.

I understand this is added to turbo'd cars, was wondering if anyone has any insight in adding them on daily driver-naturally aspirated cars.

After adding my CAI I personally don't like the idea of having engine gas/gunk (blowby) recirculated back into my throttle body. I do understand this is setup by factory and is most likely for fuel economy and emissions.

Pretty much I have two questions:
-Will I hurt my car in any way if I add an oil catch can to my car (aside from wasting my money) will it decrease fuel economy, fail emissions? make my run rich/lean?

-Anyone with experience running an oil catch can on a NA DD car? Any problems or issues? Better cleaner intake and throttle body?

Thanks.


mods please feel free to delete 2nd post:
http://www.forteforums.com/forums/performance-modifications/5176-oil-catch-can.html
 

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2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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Adding an oil catch can in the hose from the valve cover to the intake is not a bad idea. It will not affect the engine operation or fuel mileage. It will reduce the amount of residue that eventually requires cleaning of the throttle body. During normal engine operation the engine is ingesting minute oil vapor...during hard accelleration the engine can ingest engine oil through this hose. An oil catch can will eliminate some of the oil and oil vapor from getting to the intake. If someone made an oil catch can that looked good on our engines I wouldn't mind installing one. I just don't care for what's out there -- fit-all type catch cans.
 

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Discussion Starter · #3 ·
Thanks for the input. Im pretty set on getting one now, cant seem to find any good ones used in my area. Just dont wana mess up the install on one of these things.

So install would be something like:

Engine crankcase <hose> oil catch can inlet <house> air intake nipple (and thus back into my throttle body)

Is that the install process.

Ebay kits seem like they'll get the job done, except they dont come with instructions

Ebay Kit:
MITSUBISHI HYUNDAI IMPREZA 750ml JDM OIL CATCH TANK CAN on eBay.ca (item 320640241305 end time 09-Mar-11 11:45:46 EST)




3 questions.
1. which nipple is in/out (on the can) does it matter?
2. based on picture do you know if all cans come with a filter median or is it just condensation (i read that some ppl use lawn mower filter to help promote the gunk build up as rapid air flow may just negate the concept of the oil can)
3. in the picture what is that double sided nipple connector used for?
 

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2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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Looks like the double nipple conector is their filter. If the can is just hollow then it wouldn't serve its' purpose unless you have lots of oil coming through your tube. I like the lawnmower filter idea the best -- stuff the can with it and then it won't matter which outlet goes to the engine and which one goes to the intake. The pictured can has an indicator on the side to let you know if the can is full -- you won't really use that on an N/A car unless you have a really worn engine or you are driving wide open all the time!

If you look at older carbureted cars you'll see that they did put a filter inside the air cleaner assembly where the PCV hose connected -- served the same purpose as a catch can. Required you to change them at certain intervals or when dirty.
 

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Discussion Starter · #5 · (Edited)
call me an idiot, but how would the inline filter work?

I would assume it would be installed after the can (so between can and air intake) and it would somehow block the engine gunk, and it would somehow fall backwards - back into the canister? - does this mean i should install the filter really close to the exit nipple? wouldnt this clogg the whole line (well wouldn't there be a chance it would clog the whole line)

maybe im just crazy but I would assume the filter element would be located inside of the canister (and yes I know i could fill the whole thing with lawnmower filter) but then whats the nipple for?


Thanks.



EDIT:
maybe the nipple is like a back flow trap? - liquid can only go one way?
 

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Discussion Starter · #7 ·
Okay so I would install the filter (the double nipple thing in the picture) after my canister (on the exit side) and it would block all gunk, and somehow 'push' it back into the canister?

like the gasses would passby and the blowby would get trapped at the filter and automatically fall back downward into the canister?
 

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I had that exact same catch can from Ebay install on my old 92 Probe. I was absolutely suprised at how much oil built up in that thing in just around 5,000 miles. Somewhere around half the can was filled with oil, I never looked up if that was normal. I never lost any oil in my engine because I checked it regularly but I just couldn't think if all that was going into my motor. Granted I did know it was being burned by the combustion still just seemed like alot.
 
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