[DIY] Oil catch tank

[vr2turbo]

I've done this before. It didn't really work well for me. The plastic oil filter kinda compressed from the vacuum.

Is there a vacuum? The gas not just passing through?

 

[Kevinho]

Gonna turn this thing into oil catch can lol.
Just need to measure the PCV valvle size etc.

 

[Izso]

Is there a vacuum? The gas not just passing through?

My understanding is there shouldn't be a vacuum. But for some reason my crushed. Could be engine heat also but that's unlikely

 

[Kevinho]

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.

 

[vr2turbo]

My understanding is there shouldn't be a vacuum. But for some reason my crushed. Could be engine heat also but that's unlikely

My hyundai and VR ones are okay, changed them a few months back

 

[Izso]

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

 

[Izso]

My hyundai and VR ones are okay, changed them a few months back

I dunno.. maybe I connected mine wrongly or the filter was directional and I fitted it wrongly

 

[vr2turbo]

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]

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

 

[vr2turbo]

As long got place to fit it in.....

 

[noripsni]

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.

 

[Izso]

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]

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

 

[Izso]

My VR runs even hotter if not mistaken, but plastic catch tank still ok.....lol

conclusion the RM5 plastic petrol filter was made of shit quality

 

[vr2turbo]

conclusion the RM5 plastic petrol filter was made of shit quality

Maybe because mine RM8 ones.....lol

 

[Kevinho]

Lol, 3 ringgit difference.
Come we make higher quality ones using metal bottles

 

[vr2turbo]

Lol, 3 ringgit difference.
Come we make higher quality ones using metal bottles

Have mah! Fuel injected cars fuel filter is made of metal, but much more expensive

 

[gunnerzz]

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]

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]

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