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Oil catch can question
by
camboscams
on 07 Jan, 2013 19:10
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#1
by
R.O.R-2.0
on 10 Jan, 2013 15:44
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So i just got one of these in the mail....
http://www.ebay.com/itm/261150422892?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
And as far as i can tell so far it is quite nice.
An inlet port on each side, drain on the bottom and baffles on the inside.
But there is no packing on the inside, steel wool or anything like that. So should i put some in it or will it make any difference
no baffles or steel wool/brillo?
you will definitely notice a difference...
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#2
by
camboscams
on 10 Jan, 2013 15:48
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So i just got one of these in the mail....
http://www.ebay.com/itm/261150422892?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
And as far as i can tell so far it is quite nice.
An inlet port on each side, drain on the bottom and baffles on the inside.
But there is no packing on the inside, steel wool or anything like that. So should i put some in it or will it make any difference
no baffles or steel wool/brillo?
you will definitely notice a difference...
So i will notice a difference if i do or don't pack it? it currently has baffles in it but no packing.
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#3
by
R.O.R-2.0
on 10 Jan, 2013 15:56
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baffles and packing are a requirement in my mind..
baffles and brillo are what actually separate the oil from the blow-by gasses..
if there is nothing in the can, the blow-by will go thru the can, and none of the oil will fall out of suspension in the blow-by..
if you want your can to work as good as it can, then pack it with brillo, but fairly loosely..
i like brillo better because its copper coated, and much more coarse than steel wool.. i would be worried about steel wool bits finding their way into your oil..
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#4
by
745 turbogreasel
on 10 Jan, 2013 20:17
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Mine made from a jar, and a coil of sheet metal with a bunch of nail holes separates at least 90% of the oil out. No packing whatsoever. I get a pool in the jar, and just some soot on a paper towel over the outlet.
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#5
by
libbydiesel
on 10 Jan, 2013 22:31
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The baffles themselves will separate oil. Oil is heavier than the gases it is moving with and so has greater inertia. As the gases move around a baffle, the oil with it's greater inertia is flung against the baffle.
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#6
by
camboscams
on 11 Jan, 2013 17:10
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Excellent thoughts! I think i will run it as the designer had intended it for now and if it performs poorly i will pack it.
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#7
by
CrazyAndy
on 11 Jan, 2013 17:57
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Can you see how the baffles are arranged in the can? Just a curiosity question.
Is this a precautionary install, or have you been having oil consumption concerns?
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#8
by
camboscams
on 11 Jan, 2013 18:51
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Well i'm having a decent amount of blow by pressure and some turbo shaft seal issues so this is my effort to lower cranckcase pressure and "help" my turbo return its oil below the oil pan oil level and not everywhere else. Also almost all of my headgasket failures have ended with a good amount of oil leaking past the gasket at the front oil drain hole.
Its a bit hard to describe but in this picture
http://www.ebay.com/itm/261150422892?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 The two side ports go into the body of the can and then the vent has an inch or so diameter tube with stepped plates on the inside that goes about half way down inside the body. pretty slick but we'll see
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#9
by
CrazyAndy
on 11 Jan, 2013 19:29
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Sounds good, keep us updated. Hopefully the block isn't wallered out, but the can should help.
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#10
by
bajacalal
on 12 Jan, 2013 22:34
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I wouldn't put any packing or wool in it.
I tried to do something similar and add a "screen" basically a large pipe cleaner, to catch some of the oil or slow down the velocity of the air flow so oil isn't sucked out, to my stock "hockey puck" breather, and that was enough to cause oil to spray out the dipstick tube.
Now, it didn't do this all the time, just when the turbo was at full boost, so I would imagine there was just too much blowby gas that couldn't escape.
I don't know of you could get away with this on an n/a motor but I don't think there should be any restriction at all.
I also picked up a Mercedes 240d oil catch can (as somebody recommended) and it has a very similar design to the one pictured (but isn't vented to atmosphere) and it has no packing inside.
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#11
by
R.O.R-2.0
on 14 Jan, 2013 07:20
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I wouldn't put any packing or wool in it.
I tried to do something similar and add a "screen" basically a large pipe cleaner, to catch some of the oil or slow down the velocity of the air flow so oil isn't sucked out, to my stock "hockey puck" breather, and that was enough to cause oil to spray out the dipstick tube.
Now, it didn't do this all the time, just when the turbo was at full boost, so I would imagine there was just too much blowby gas that couldn't escape.
I don't know of you could get away with this on an n/a motor but I don't think there should be any restriction at all.
I also picked up a Mercedes 240d oil catch can (as somebody recommended) and it has a very similar design to the one pictured (but isn't vented to atmosphere) and it has no packing inside.
you are supposed to pack them extremely loose..
and there is supposed to be LOTS of surface area for the oil to stick to the packing, while still allowing the blow by gasses to go thru the packing, unrestricted..
there isnt enough space inside a stock hockey puck breather filter.. they are not designed to be packed..
ive built a few aluminum catch cans, both baffled, and packed..
i find the ones loosely packed with brillo to work more efficiently than the baffled ones. could be that my baffles werent designed properly tho..
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#12
by
rs899
on 14 Jan, 2013 10:19
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I also picked up a Mercedes 240d oil catch can (as somebody recommended) and it has a very similar design to the one pictured (but isn't vented to atmosphere) and it has no packing inside.
I think the 240D can relies on centifugal force to remove the oil.
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#13
by
8v-of-fury
on 14 Jan, 2013 20:05
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#14
by
bajacalal
on 14 Jan, 2013 22:25
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you are supposed to pack them extremely loose..
and there is supposed to be LOTS of surface area for the oil to stick to the packing, while still allowing the blow by gasses to go thru the packing, unrestricted..
there isnt enough space inside a stock hockey puck breather filter.. they are not designed to be packed..
ive built a few aluminum catch cans, both baffled, and packed..
i find the ones loosely packed with brillo to work more efficiently than the baffled ones. could be that my baffles werent designed properly tho..
Well, I didn't use a very big screen, you could still blow through it pretty easily but I guess that was still too much.
I hope you don't mean actual Brillo too, you know that stuff with the detergent in it.
