Im happy to carry on emptying them every 2 weeks. The idea isnt for labour saving. Its to double filter the moisture out so only the crank fumes are left to go back into the turbo.
A baffling catch tank question.
- Thread starter Rich.T
- Start date
Yeah but surely if the first fills up the moisture will just flow back down into the crank as opposed to the second can?
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I have just emptied my catch can (has tap in bottom) I got approx 1/2 an egg cup out of it.
A couple of things here - I tried 2 catch cans - well a catch can and a plastic drink bottle - It didn't work as expected. You just ended up having to empty 2 all the time.
Vent to atmosphere if done properly works fine and isn't messy as its only venting fumes the liquid still stays in the can.
The hockey puck with a catch can does nothing.
The engine is a suction pump so yes you will get some suck back from the catch can but again if its baffled and not full it cant/wont pull anything back. Also the catch can cannot be restrictive if the engine is pumping out x through the breathers the catch can must be able to deal with that x and not cause the engine to not breath. Turbo motors much worse than nasp at this - My BAM breathes heavy but doesn't produce lots of fluid .
A couple of things here - I tried 2 catch cans - well a catch can and a plastic drink bottle - It didn't work as expected. You just ended up having to empty 2 all the time.
Vent to atmosphere if done properly works fine and isn't messy as its only venting fumes the liquid still stays in the can.
The hockey puck with a catch can does nothing.
The engine is a suction pump so yes you will get some suck back from the catch can but again if its baffled and not full it cant/wont pull anything back. Also the catch can cannot be restrictive if the engine is pumping out x through the breathers the catch can must be able to deal with that x and not cause the engine to not breath. Turbo motors much worse than nasp at this - My BAM breathes heavy but doesn't produce lots of fluid .
Possibly, i dont know. The 2nd one would in theory, wouldnt get much in it. Just catching that 'spits through' from the 1st that would normally end up in the puc etc
The problem im finding with the can i have is its poorly baffled.
I got what seems to be the popular choice for this car but not 100% happy with its ability.
It is catching a lot of water which im happy with as it shows its working.
But due to the air speed passing through it i feel that a lot of moisture is being drawn in and straight back out again. Due to the lack of baffling its actually got.
Some sort of media in there (thus increasing the surface area the fumes come into contact with) would help as itd catch the moisture and would run to the bottom of the can when the engine is switched off.
But getting that wrong could cause catastrophic engine damage.
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Ok, been out side and had a look at what i can do to improve on what i have.
Ive not got any real options with where the can is so that'll be stayin put.
The thing i have noticed is the puc sits a good inch lower than the can outlet. And my way of thinking is every little helps so have ordered a slightly longer section of silicone hose to raise it up a couple of inches. Once ive done that im going to leave well alone.
After this ive decided i need to move on with my life haha so will stop over thinking this and leave it be.
Ive not got any real options with where the can is so that'll be stayin put.
The thing i have noticed is the puc sits a good inch lower than the can outlet. And my way of thinking is every little helps so have ordered a slightly longer section of silicone hose to raise it up a couple of inches. Once ive done that im going to leave well alone.
After this ive decided i need to move on with my life haha so will stop over thinking this and leave it be.
Well, i couldn't stop thinking about it haha.
Bought a load of new parts and refitted the entire pcv system BUT kept the catch tank.
Fitted inline between the pipe up from the pcv and the puc.
I was going to leave it 2 weeks and check in the catch tank.
But going for a long drive at the weekend with my missus and the hound so thought id check it today.
Unscrewed the can and there's nothing in there, just the smell of crank fumes.
And i mean bone dry. Wiped it out with a piece of kitchen towel and not even a thin film of oil!
So the pcv is clearly working but what happens to the moisture? Straight out the exhaust?
I know its been warm this week but i was expecting something in there.
Bought a load of new parts and refitted the entire pcv system BUT kept the catch tank.
Fitted inline between the pipe up from the pcv and the puc.
I was going to leave it 2 weeks and check in the catch tank.
But going for a long drive at the weekend with my missus and the hound so thought id check it today.
Unscrewed the can and there's nothing in there, just the smell of crank fumes.
And i mean bone dry. Wiped it out with a piece of kitchen towel and not even a thin film of oil!
So the pcv is clearly working but what happens to the moisture? Straight out the exhaust?
I know its been warm this week but i was expecting something in there.
I think it collects the moisture A) as the engine cools down and any oil vapor can condense B)cold nights when external weather causes condensation inside the can. Be interesting to see what it’s like in a month. That being said the oil vapor would pass over thousands of hours use. Mine has been bone dry a month or so now too
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