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View Full Version : What are air breathers?



smallkid
13-02-2004, 11:23 PM
Hy guys I was browsing in Autobarn today and saw these little fellas.

They are called air breathers, and they are smaller versions of a pod filter. The filter size is slightly bigger than a 50 cent coin.

Anyone knows whut are they ancd care to explain their function?

Thanks!

McChook
13-02-2004, 11:25 PM
I dunno aye....

smallkid
13-02-2004, 11:25 PM
BTW guys here's a pic

http://www.tuneshops.com/productimages/Breather_Tenzo_sm1.jpg

McChook
13-02-2004, 11:28 PM
OH

put them on the top ofyour catch can/oil breather or if you are japanese, you would call it a surge tank, but not in Australia

smallkid
13-02-2004, 11:29 PM
Is it? Any good?

Any pics showing their application?

McChook
13-02-2004, 11:32 PM
hang on, skyline's and silvias always have them, so look for under bonnet shots... we have a catch can on the race car, so I will look in our archives

McChook
13-02-2004, 11:54 PM
one of these

http://www.gcg.com.au/catalogue/Oil%20Filters%20&%20Oils/oil%20air%20seperator%20round.jpg

In action (filter missing coz cusco ones don;t use them
http://www.nismo.com.au/pricelists/Cusco/cuscooilcatch.jpg

smallkid
13-02-2004, 11:57 PM
Whoa...okay....okay since I am curious, and a ill knowledged guy, what does an oil catch tank do?

McChook
13-02-2004, 11:58 PM
well, it separates air from oil... catches excess... its a safty thing...

DAVE, i know you are here.... answer....

smallkid
14-02-2004, 12:00 AM
Well, these breathers..besides teh oil catch tank...no other applications?

McChook
14-02-2004, 12:01 AM
oh, I' sure they prolly do other things

riceboys prolly hang them from their rear vision mirrors instead of air fresheners

smallkid
14-02-2004, 12:05 AM
oh! now i get it!!

hee hee....

Becaus i see one fitted somewhere along some pipings as well. Not too sure whut piping are those though.

Weq
14-02-2004, 12:33 AM
U can stick them directly onto any crank case. Its just a breather for the PCV system. If u get a heep of blow-by, then u use a catch can to help separete the air from oil. otherwise u can just attach one of those guys to ur crank case and let it vent to the atmosphere. Note: if u do get blowby with the breather, expect some oil in ur engine bay.

McChook
14-02-2004, 12:34 AM
:thumbsup:

what he said exactly. altho venting causes a DEFECT

smallkid
14-02-2004, 12:44 AM
Hmm..does that mean that it removes excess pressure in your engine oil? I cant imagien engine oil spewing out to your engien bay though

Weq
14-02-2004, 01:08 AM
the PCV (positive crankcase ventilation) system is built into all cars. From factory it is ducted straight into ur intake manifold. U can mod it with a 'cool' breather if u wish..
Yes air does come spewing out, ive got a good video of a turbo b16 with HUGE blowby. This usually indicated advanced o-ring wear though.

smallkid
14-02-2004, 01:12 AM
IS that the little pipe that goes to the air filter? Something like a fat straw

Weq
14-02-2004, 01:07 PM
yer from ur valve cover to ur airfilter or throttle body.

smallkid
14-02-2004, 04:17 PM
Yeah. That is the one

wynode
14-02-2004, 05:07 PM
Its attached at the end of the crankcase breather hose. This hose usually feeds back into the intake manifold and as a result reduces the combusting efficiency slightly. Hence people use such a breather to keep the oil vapour out of the chamber.

Note though, that it is defect worthy as it vents to the atmosphere.

smallkid
14-02-2004, 08:55 PM
Oooh! Okay! Competely understood now. Thanks guys!!

Jim80y
14-02-2004, 10:13 PM
What you need is one of these:

http://www.we-todd-did-racing.com/wetoddimage.wtdr/i=wMjczNDE4NnM0MTNkZmQzMXk1NDE%3D.jpg

You can either connect it to the valve cover or inbetween the PCV valve and intake manifold.

smallkid
14-02-2004, 10:28 PM
Okay...another question guys

An oil catch tank. Their applications are most suited for a Turbo car right? Either that or a larger capacity N/A car.

So my puny Civic does not need it?

smallkid
15-02-2004, 10:28 PM
so guys, any good?

Integ LS
16-02-2004, 06:57 PM
Ive got one on the teg the way I figure it is if their is any blowby (unlikely in NA motor) but incase I dont want it going into throttle.