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Old 07-13-2011, 09:37 AM   #1
Izso
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Default [DIY] Oil catch tank

I never understood why engine manufacturers routed blow-by gases back into the intake manifold. All the oil vapour (read : Oil) gets trapped there and completely clogs the throttle body and intake manifold causing sluggish performance, inaccurate idling and in some cases engine dying off due to overly low idling.

In order to counter this problem, some budding aftermarket enthusiast created the Oil Catch Tank (OCT) and connected it to the PCV valve catching all the oil vapour therefore keeping the intake manifold relatively clean.


Picture taken from ZTH sales pages, copyright and all belong to the owner, not me

So I was thinking, is there a DIY-er way of doing this OCT without spending too much? Yes there was.

Tools needed :
1. Iswara Fuel filter
2. Automotive rubber hose
3. Clamps




Locate the PCV valve in your car (usually it's a rubber hose going from your cylinder head going into your intake usually before the throttlebody).




Replace this hose with your makeshift OCT and you're pretty much done.




The Iswara fuel filter has paper filters in it which will trap the oil vapour (read : Oil) and collect it in the filter. So be sure to replace the filter once it fills up (eventually). RM6 bucks give or take!

Enjoy!


Disclaimer : I've only done this for my Wira, Myvi and Toyota Unser without adverse effects. I do not and will not claim that this works for all car makes and models
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Last edited by Izso; 07-13-2011 at 09:38 AM. Reason: Typo!
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Old 07-13-2011, 02:01 PM   #2
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Default Re: [DIY] Oil catch tank

i like this... especially the filtering part... this can help ensure that only gasses go back to the intake manifold and not oil that managed to escape the tank....only downside is that its so friggin small...and everytime it fills up u need to buy a new filter. would prefer the type that u can empty out and reuse..

for the filtering some people use those stainless steel scourer ball (those stainless steel mesh ball thingy used to wash dishes) and unravel them abit and shove them in the OCT. it helps to catch even more oil in the vapor.
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Last edited by TitanRev; 07-16-2011 at 01:36 PM.
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Old 07-13-2011, 02:23 PM   #3
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Default Re: [DIY] Oil catch tank

Just for the record, I just discovered I connected the OCT to the wrong hose. I used the breather hose instead of the PCV!

(This is a Myvi btw)

So if anyone is doing this for their Myvi, please stay tuned. I will make corrections and post up followup pictures soon
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Old 07-13-2011, 02:44 PM   #4
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Default Re: [DIY] Oil catch tank

izso,
great diy bro...im gonna try it too...
u think it works for perdana ah?
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Old 07-13-2011, 03:18 PM   #5
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Default Re: [DIY] Oil catch tank

Quote:
Originally Posted by DanzEterna View Post
izso,
great diy bro...im gonna try it too...
u think it works for perdana ah?
Sure can Danz. Just locate the PCV valve pipe which goes from your cylinder head to the intake manifold. Usually there's two, one as a 'breather' and the other is the PCV. You'll wanna hook the OCT to the PCV
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Old 07-13-2011, 03:47 PM   #6
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Default Re: [DIY] Oil catch tank

Thanks Izso. Well Done.

Anyway, the breather is the one before throttle body hile the PCV is the one connected to the intake manifold. Correct?
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Old 07-13-2011, 03:58 PM   #7
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Default Re: [DIY] Oil catch tank

Quote:
Originally Posted by BoxCarRacer View Post
Thanks Izso. Well Done.

Anyway, the breather is the one before throttle body hile the PCV is the one connected to the intake manifold. Correct?
That would be correct!
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Old 07-15-2011, 06:04 AM   #8
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Default Re: [DIY] Oil catch tank

Hi Bro

On the average, how many km, does that oil filter last ?
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Old 07-15-2011, 07:22 AM   #9
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Default Re: [DIY] Oil catch tank

Quote:
Originally Posted by kaderAE101 View Post
Hi Bro

On the average, how many km, does that oil filter last ?
Um... I change it every 20k km. But even then it's barely 1/4 full
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Old 07-15-2011, 10:05 AM   #10
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Default Re: [DIY] Oil catch tank

Izso,

Thanks for the good idea.
The best part is, the OCT you invent doesn't consume much space like other product.
I wish to try on my 4G63T...
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Old 07-15-2011, 08:58 PM   #11
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Default Re: [DIY] Oil catch tank

Ok some updates.

I realised I connected the OCT to the wrong hose and used the breather hose instead of the PCV. How did I know? Apart from a friend pointing it out, the original hose I pulled out was pretty dry. The PCV hose that I pulled out today was wet and oily. A pretty good indicator of where to connect your OCT.

I pulled out the OCT, plugged the original hose back and swapped out the PCV hose.

So here's the updated product :

You can make out a little bit of oily bits around the green coloured sleeve.



I connected the other end to the bit that goes into the intake manifold.



Cable tied it a bit to keep it firmly in place and I'm done!
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Old 07-15-2011, 10:11 PM   #12
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Default

I think for NA should be no problem. But for turbo need be careful the back pressure end up yr engine oil needle fly up it give you more problem.

Anyway the invention look cute.
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Old 07-15-2011, 10:55 PM   #13
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Default Re: [DIY] Oil catch tank

nice DIY! where to buy those items for DIY though?
im located at KL/PJ
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Old 07-16-2011, 12:14 AM   #14
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Default Re: [DIY] Oil catch tank

Ohhhh, so that's what the oily hose is in my Kelisa intake. Was wondering what engine oil is doing in the intake... I thought my engine oil leaking . I got 1 spare saga filter, gona get some rubber hose and try this out . Thanks for the DIY.
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Old 07-16-2011, 01:59 AM   #15
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Default Re: [DIY] Oil catch tank

done bfore on my previous car, kelisa,only cost me rm5 for the fuel filter.just find out can diy it on myvi..
thanks bro!
will try it out on my myvi..
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