[DIY] Oil catch tank

Kevinho

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Kevinho

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My understanding is there shouldn't be a vacuum. But for some reason my crushed. Could be engine heat also but that's unlikely
I saw some post saying that you made the cylinder bore bigger right ?
Could it be that ?
Bigger volume in the combustion chamber.
Suck more air in during downward stroke. Causing morem vacuum than usual at the breather hose side.

Not sure whether it works that way.
 

Izso

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I saw some post saying that you made the cylinder bore bigger right ?
Could it be that ?
Bigger volume in the combustion chamber.
Suck more air in during downward stroke. Causing morem vacuum than usual at the breather hose side.

Not sure whether it works that way.
on my Myvi? It's completely stock. My old wira is a different story
 

vr2turbo

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vr2turbo

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I dunno.. maybe I connected mine wrongly or the filter was directional and I fitted it wrongly
Even terbalik, won't get crushed. Maybe because of heat it melted but then in my turbo VR also very hot still survived.......lol
 

Kevinho

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Kevinho

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My understanding is there shouldn't be a vacuum. But for some reason my crushed. Could be engine heat also but that's unlikely
I'm gonna try on my brothers Myvi to see whether got strong vacuum like u said.

Oh ya, guys, if I placed my oil catch can here shouldn't be a problem right ?
Away from engine, between battery, air box and fuse box
IMG_20180710_234112.jpg
 

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noripsni

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noripsni

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your crankcase runs at positive pressure, not a vacuum, its why you can blow crankshaft seals if the breather is blocked, the reason is some compression escapes past the rings, on the fiat engines at high rpm (7-8k rpm) the pressure is such that it can stop the oil draining back from the valve cover, causing filling of the valve cover, oil starvation to the cam and lowering the oil level in the sump, so abarth had a crankcase breather with oil arrester AND a valve cover breather with pipes going above the engine, then down to a catch tank. Now I know your car is not a fiat abarth, but i use this it illustrate how all internal combustion engines run at positive crankcase pressure not negative (vacuum), My plastic oil tank is also shrunken on my Coupe, its due to exhaust heat and the hot oil fumes melting the plastic, these bottles shrink when heated, try it, throw a water bottle on a fire.
800px-Fiat_Abarth_1000_Engine2.jpg
 

Izso

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your crankcase runs at positive pressure, not a vacuum, its why you can blow crankshaft seals if the breather is blocked, the reason is some compression escapes past the rings, on the fiat engines at high rpm (7-8k rpm) the pressure is such that it can stop the oil draining back from the valve cover, causing filling of the valve cover, oil starvation to the cam and lowering the oil level in the sump, so abarth had a crankcase breather with oil arrester AND a valve cover breather with pipes going above the engine, then down to a catch tank. Now I know your car is not a fiat abarth, but i use this it illustrate how all internal combustion engines run at positive crankcase pressure not negative (vacuum), My plastic oil tank is also shrunken on my Coupe, its due to exhaust heat and the hot oil fumes melting the plastic, these bottles shrink when heated, try it, throw a water bottle on a fire.
Heat from oil fumes shrunk my plastic petrol filter OCT. Makes sense but I didn't think a K3VE would make that much heat.
 

vr2turbo

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vr2turbo

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Heat from oil fumes shrunk my plastic petrol filter OCT. Makes sense but I didn't think a K3VE would make that much heat.
My VR runs even hotter if not mistaken, but plastic catch tank still ok.....lol
 

gunnerzz

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gunnerzz

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Have mah! Fuel injected cars fuel filter is made of metal, but much more expensive
much more expensive in term of price gap but still cheap.
only thing u cannot see through the container.not sure if the filter material can stand heat as its design to filter petrol which will be lower in temperature.
some cheapo version uses tissue like material...so must bw careful.
 

Kevinho

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Kevinho

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Have mah! Fuel injected cars fuel filter is made of metal, but much more expensive
Yea lar
Easily > 100 ringgit
But dunno whether got use good stuff for filter material anot
much more expensive in term of price gap but still cheap.
only thing u cannot see through the container.not sure if the filter material can stand heat as its design to filter petrol which will be lower in temperature.
some cheapo version uses tissue like material...so must bw careful.
 

vr2turbo

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Yea lar
Easily > 100 ringgit
But dunno whether got use good stuff for filter material anot
Depends on car model. Mine around RM40 to 60, but like bro. gunnerzz mentioned cannot see inside. I still prefer my plastic ones......lol
 

Kevinho

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Kevinho

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Lol, I guess I have joined the lazy gang. Not sure when my oil catch tank can finish making. I'll just put in the iswara fuel filter first.
IMG_20180715_195351.jpg
 

abubin

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abubin

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Can I get a clearer picture on MyVI OCT implementation? Noob here and very interested with installing OCT on my 2006 1.3 MyVi. Very sorry to bro Izso as I don't see the host clear enough going from where to where and which one is intake and outtake.
 

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Can I get a clearer picture on MyVI OCT implementation? Noob here and very interested with installing OCT on my 2006 1.3 MyVi. Very sorry to bro Izso as I don't see the host clear enough going from where to where and which one is intake and outtake.
Are you going to use a proper OCT can or one of those fuel filters?
 

abubin

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Are you going to use a proper OCT can or one of those fuel filters?
Have not decided yet.
Is there a difference? Probably going to those ready made cans where some have 2 ports and some 3 ports.
 

Izso

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Have not decided yet.
Is there a difference? Probably going to those ready made cans where some have 2 ports and some 3 ports.
i don't recommend what I did with the fuel filter. I found out later that it deformed and ended up clogging the inlet. It made it a lot worse. Better to use a proper OCT canister.
 

gunnerzz

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gunnerzz

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i don't recommend what I did with the fuel filter. I found out later that it deformed and ended up clogging the inlet. It made it a lot worse. Better to use a proper OCT canister.
Vacuum is too strong. If the filter is always dry then its ok. Once the filter is wet with oil (which it will) this will cause it harder to suck thru the filter and the air will pressure will crush the filter.
 

abubin

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i don't recommend what I did with the fuel filter. I found out later that it deformed and ended up clogging the inlet. It made it a lot worse. Better to use a proper OCT canister.
Ahh..I see. Definitely do not want it to cause more problems than benefits. In that case, do you have any OCT canister to recommend? For MyVI, is something like this good enough?