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Homemade Oil Catch Can (pics)

Started by _Aquarius - LC_ , Apr 21 2006 01:55 PM

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20 replies to this topic

#1 _Aquarius - LC_

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Posted 21 April 2006 - 01:55 PM

G'day all,

Here is something I should have done ages ago!!!!
If, like me, you have a worked Holden 6 that loves
to suck oil up the PCV, then waste it by blowing
embarrassing blue smoke out the exhaust.
Here is a low $$ fix. Firstly it is a common problem
if you are running roller rockers and/or a rocker cover
with poorly designed baffles that allow the oil to get
past instead of just the vapors.

Anyway money is very tight at the moment so I
could not afford the $80 to $120+ purpose built oil catch
can, or the $180 alloy rocker cover to fix the problem.

So $32 later I made this:-

https://cache.gmh-to...02/000_1405.jpg

I bought a drink bottle from Amart All Sports (2 for $10)
A few brass fittings, a ball tap from Enzed, a few hose
clamps and 1 metre of rubber hose.

https://cache.gmh-to...02/000_1398.jpg

Catch can without the breather (for use with PCV)
https://cache.gmh-to...02/000_1397.jpg

Catch can fitted in the engine bay
https://cache.gmh-to...02/000_1410.jpg

https://cache.gmh-to...02/000_1409.jpg

Tap with fitting into blank fuel pump plate
https://cache.gmh-to...02/000_1415.jpg

This simple set up seems to work very well. The oil is
retained in the catch can, all you have to do periodically
open the tap to allow the oil to drain back into the sump.

Please note: my catch can is using the original PCV, so
therefore the tap needs to be closed while the engine is running
otherwise the PCV will try and suck air up the pipe from the sump.

I just thought I'd share with you all.

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#2 _355lxss_

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Posted 21 April 2006 - 02:46 PM

wow that great thinking there, looks like a very effective setup and hell cheap too!
How did you fix the brass fittings to the bottle?

Great work :spoton:

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#3 _Aquarius - LC_

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Posted 21 April 2006 - 04:15 PM

Thank's 355lxss,

The brass fittings have tapered thread, so i just drilled the
holes in the aluminium bottle slighty smaller than the first
thread, once i got it started [carefully], they just tap there
own thread & because of the taper seal perfectly. :clap:

The real tricky part came next. The fitting that is designated
to run a hose back to the intake manifold, needs to be extended
in length on the inside of the can. I used another fitting with
female thread and a short piece of hose, it needs to reach just
short of the opposite side of can. This is so only vapour is sucked
back to the into the intake & the oil entering the can through the
short fitting runs down inside the can and stays there.

The photo is a little blurry, (close up)
https://cache.gmh-to...02/000_1402.jpg

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#4 _jap-xu1_

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Posted 21 April 2006 - 05:49 PM

How did you fix the brass fittings to the bottle?

old bong skills lmao

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#5 rodomo

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Posted 22 April 2006 - 12:49 AM

What are the huge convoluted pipes for?

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#6 FastEHHolden

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Posted 22 April 2006 - 01:12 AM

looks like cool air into his air box

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#7 rodomo

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Posted 22 April 2006 - 01:52 AM

Must be having probs with evaporation?

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#8 _Aquarius - LC_

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Posted 22 April 2006 - 08:55 AM

Must be having probs with evaporation?

Never had evaporation problems. The pipes supply air to the carbs,
one picks up cool air from behind the grill and the other from underneath
the front.

I designed this plate/heat shield so that when the bonnet is closed, a 1/3
of my engine bay is essentally cold air box. It works very well.

https://cache.gmh-to...202/Triple5.jpg

https://cache.gmh-to...202/Triple3.jpg

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#9 _Herne_

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Posted 22 April 2006 - 09:28 AM

That heat shield/cold air appears very similar to what historic racers use to overcome the no cold air induction allowed rule

From what I remember they dont run the pipes though.
Class N* (is it Nj) from memory

Cheers
Herne

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#10 rodomo

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Posted 22 April 2006 - 09:46 AM

Ah! Now I see. Clever!

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#11 Tiny

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Posted 22 April 2006 - 11:21 AM

Shithot Well done!

Goes to show what a bit of lateral thinking can achieve when funds are tight!

When are you going to start selling them

LOL

Cheers!

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#12 _brett_32i_

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Posted 22 April 2006 - 12:38 PM

im a fan of your cold air setup!!

i just wish they made 3 litre drink bottles...stupid CAMS

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#13 _JBM_

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Posted 22 April 2006 - 03:21 PM

You can also fill the bottle with stainless steel scourers to help condense the oil vapour back to a liquid, it increases the surface area for the condensation to occur.

James

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#14 _Aquarius - LC_

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Posted 22 April 2006 - 07:06 PM

Shithot Well done!

Goes to show what a bit of lateral thinking can achieve when funds are tight!

Thanks Tiny and every one else, for the encouragement!!!

It seems my whole car has been built using this method of thinking!!! LOL
These forums have been great motivation to get out and do some more
work to the old girl.

JBM @ 22 April 2006, 3.21PM

You can also fill the bottle with stainless steel scourers to help condense the oil
vapour back to a liquid, it increases the surface area for the condensation to occur.

Thanks JBM, I think I will do that, good tip and makes sense.

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#15 _wabbit_

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Posted 22 April 2006 - 08:40 PM

im a fan of your cold air setup!!

i just wish they made 3 litre drink bottles...stupid CAMS

have a look around for used fire extinguishers. some of them work very well

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#16 _Jewboy_

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Posted 23 April 2006 - 06:08 PM

The tapered threads are NPT, don't get BSP as they are parrallel thread (was sold these even after i asked for NPT)

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#17 J-Rod

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Posted 23 April 2006 - 07:38 PM

The tapered threads are NPT, don't get BSP as they are parrallel thread (was sold these even after i asked for NPT)

BSP (British Standard Pipe) is available as parallel or tapered

NPT (National Pipe Thread) is tapered only

cheers

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#18 _brett_32i_

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Posted 23 April 2006 - 07:55 PM

as stated by j-rod, bspt is the code.

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#19 _JBM_

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Posted 23 April 2006 - 08:22 PM

If u r using BSPP (British Standard Pipe Thread, Parallel) tapped hole or female fitting use a BSPT (British Standard Pipe Thread, Tapered) male fitting or pipe.

If u r using a parallel to parallel connection a secondary seal is required, ie fibre washer or o-ring.

Same For NPT. JIT or whatever thread form u r using.

James

Edited by JBM, 23 April 2006 - 08:33 PM.

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#20 LC-069

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Name:Mark
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Posted 25 April 2006 - 02:20 PM

Just wondering why have you extended your pvc valve from the rocker cover?

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#21 _Aquarius - LC_

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Posted 25 April 2006 - 07:15 PM

Just wondering why have you extended your pvc valve from the rocker cover?

G'day LC-069,
My engine builder made the extension up for me a few years ago.
It's filled with filtration foam, which i renew every few months.

This was our first attempt to stop oil from being sucked up the PCV,
but would still allow adequate ventilation. It worked very well...
However my engine's now alot more powerful these days, so i
needed something more! That's why i have made the catch can.
I've left the extension in place because it's working perfect. :clap:

Hope this answers your question ! :rockon: