Catch Can disappointment pics inside

[mattbta]

I'm so calling it this from now on LOL

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[CountryBoy19]

Do it. James let us know he wouldn't be around for a while, and I can't speak to his breathers.

I can, however, tell you that I take 2oz out of mine every interval (5000). In the course of just my ownership of this truck, that amounts to a soda can full of oil that's not in my intake.

Its not so much me doubting the need to get the vapors out of the intake, I trust that. It's just deciding what to do with them... many run a catch can bc thats the environmentally friendly way buts that's at a cost and I suspect the catch cans are still letting a lot of vapors by... vents would be the best way to keep vapors out and would also be cheaper

 

[SnowDrifter]

Its not so much me doubting the need to get the vapors out of the intake, I trust that. It's just deciding what to do with them... many run a catch can bc thats the environmentally friendly way buts that's at a cost and I suspect the catch cans are still letting a lot of vapors by... vents would be the best way to keep vapors out and would also be cheaper

Consider what's in the vapors and why the interest in a catch can

Some co2, co, fuel vapor is not an issue. That gets burned and pushed through the cat.

The concern here, is primarily oil or any sort of soot which deposits itself on the intake. Deposits are a valid concern if you intend to keep a vehicle for a long time. Much easier to stop them from forming than it is to remove them once they're there.

The vapors/gasses arent the concern. It's the other contaminants they carry with

 

[HiHoeSilver]

Consider what's in the vapors and why the interest in a catch can

Some co2, co, fuel vapor is not an issue. That gets burned and pushed through the cat.

The concern here, is primarily oil or any sort of soot which deposits itself on the intake. Deposits are a valid concern if you intend to keep a vehicle for a long time. Much easier to stop them from forming than it is to remove them once they're there.

The vapors/gasses arent the concern. It's the other contaminants they carry with

True, but the oil is technically in vapor form in the PCV hose. The catch can and (especially) its filter material gives the oil a place to condense back into liquid form and stay there.

 

[SnowDrifter]

True, but the oil is technically in vapor form in the PCV hose. The catch can and (especially) its filter material gives the oil a place to condense back into liquid form and stay there.

Lets clarify: When you say vapor, are you referring to a gaseous form of oil, or a suspension of oil in air?

I'm under the impression that the catch can is designed to capture suspended oil droplets in air as opposed to acting as a distilling column. That's what allows devices such as a centrifugal separator to work. https://www.alfdex.com/crankcase-ventilation/oil-mist-separator/

I need to run and won't get a chance to respond until late today or sometime tomorrow, but I'd like to continue this discussion. I think we could get some good info out of it

 

[HiHoeSilver]

Lets clarify: When you say vapor, are you referring to a gaseous form of oil, or a suspension of oil in air?

I'm under the impression that the catch can is designed to capture suspended oil droplets in air as opposed to acting as a distilling column. That's what allows devices such as a centrifugal separator to work. https://www.alfdex.com/crankcase-ventilation/oil-mist-separator/

I need to run and won't get a chance to respond until late today or sometime tomorrow, but I'd like to continue this discussion. I think we could get some good info out of it

Good point. It is liquid suspension in air. Motor oil doesn't boil until close to 300 F or more, so it really is just liquid oil that is getting "blown by" and caught in the media, not really condensing as I stated earlier.

 

[dubyagee01]

I have a “catch can” from a tier 4 industrial Kubota diesel. Its designed to return the oil to the pan. I was going to use it on an old Mercedes diesel. I am now wondering if it can be used on a gas engine.

 

[CountryBoy19]

Consider what's in the vapors and why the interest in a catch can

Some co2, co, fuel vapor is not an issue. That gets burned and pushed through the cat.

The concern here, is primarily oil or any sort of soot which deposits itself on the intake. Deposits are a valid concern if you intend to keep a vehicle for a long time. Much easier to stop them from forming than it is to remove them once they're there.

The vapors/gasses arent the concern. It's the other contaminants they carry with

The point I'm making is, with a catch-can you're paying a lot of money to still feed that crap to your intake. Has there ever been truly scientific testing done to see what is making it past the catch-can? You can't just put another catch-can there to see what made it past the first because you would only be capturing the stuff that made it past the first and was captured in the 2nd. What if those cans were only 10% effective? IE, I don't care about what makes it into the can, I care about what makes it past the can.

Vents completely resolve that question as it vents that crap to the atmosphere just like many older engines. But doing that opens up another can of worms, the environmental impact... of which I don't care to debate. I was just curious of he had a chance to look into the venting option anymore...

 

[bottomline2000]

The point I'm making is, with a catch-can you're paying a lot of money to still feed that crap to your intake. Has there ever been truly scientific testing done to see what is making it past the catch-can? You can't just put another catch-can there to see what made it past the first because you would only be capturing the stuff that made it past the first and was captured in the 2nd. What if those cans were only 10% effective? IE, I don't care about what makes it into the can, I care about what makes it past the can.

Vents completely resolve that question as it vents that crap to the atmosphere just like many older engines. But doing that opens up another can of worms, the environmental impact... of which I don't care to debate. I was just curious of he had a chance to look into the venting option anymore...

Adding a 2nd can would be a good test to see what is being missed. I have pulled my hose from my catchcan to the intake and it was dry. That's a good indication that nothing significant is blowing through. My original 5.3 intake literally had pools of oil in it and was completely caked up. I don't care about the vapor being recirculated but I would not want my PVC System vented. You will probably get carbon monoxide build up under the hood and could have deadly consequences.

Sent from my SAMSUNG-SM-T377A using Tapatalk

 

[swathdiver]

Bumping this to find out if you ever installed your breathers...

Not yet. I planned to do them last month but we had to move and it may be some time before I get around to it. The motor rarely sees full throttle or even rpms above 3000. I say this because it does not burn oil. 6 clean quarts in and 5k later, 6 dirty quarts out.