When I clicked that link, I had liked that before but never remember watching it... thanks for posting.

 

yeah those are one way valves

 

I don't understand why they'd put fabric/paper in there at all unless they wanted some air to pass through. And that's going to clog fast....

 

there is no evidence that all mainstream air is intended to flow thru that paper screen and out the CCV box. to me that screen looks like a droplets trap intended to deflect drops dripping down to make them go around the three intake ports of what looks to be a pressure valve (3 holes in and 1 hole out). to me, the paper screen is not inline to catch 100% of the air flow.

 

So that thread was from 2020. It's wild that there was no filter or baffles, from what could be seen IIRC... you still running the same box? How's it working if so?

 

So, is the new box worse than the old one?
if it shuts flow off a high boost, that seems bad.
less flow overall seems bad, likely leading to higher internal pressure.
if it clogs up sooner, that's bad.

 

All of the OEM boxes shut off flow and allow crankcase pressure to build during high boost, every version to date.

Each is different, better who knows?

 

there are a few different threads going right now about ccv pressures and some of the same people are in all of them.


some additional comments reguarding the 100% assumtion that all 6.7 engines will develop oil seal leaks if the stock setup is left in place.


I personally have put a guage to my oil dipstick tube and got zero changes of crank case pressure while parked at different rpms.


but on the other hand....there are videos of caps blowing off due to high cc pressure and there are videos of guys demonstrating high vacumes when the cap is off....they take the cap off...but their palm over the oil fill cap hole...wait a few minutes...and when they remove their palm a big reverse vaccume burp happens. then on another thread a guy rigs up his oil fill cap with a hole and puts a sensor in it and sends the data to a gauge and rips up the highway trying to make the needle move and concluded what I concluded and had zero changes to CC pressure at any rpm.


dont know what the heck is going on....some engines have excessive CC pressure...some have excessive vacume pressure and some have neither.


so I find it hard to believe that in a 6.7 that does not have mechanical problems....leaving the stock CCV in will blow your pan seals.


so right now..my head is spinning...leave the stock CCV in and your doomed....vent it to air and you could be releasing pressure. and oil will pool in the hose and burp out onto someones windsheild on the highway.... or if you have a 6.7 that generates vacume....the hose you run to the bottom of the chasis will be sucking sand dust into your engine....if you think not returning to intake is good and you vent to exhuast pipe them your dealership is going to say you have a bad dpf becuase your exhuast will always be black.


all in all...I think I like the vent to exhuast idea the best...if your engine generates CC pressure the gases will go to the exhuast....if your engine generates vacume then you will just suck in exhuast fumes....if your engine does neither then nothing will happen.


.

 

Well..... that's as clear mud!

 

So why *wouldn’t* you want to vent to atmosphere assuming neutral stance on pollution.

 

if your engine is one of those that develops CC suction instead of CC pressure you would be sucking in dirt particles thru the “ CC to air hose”

 

How or when do you see a crankcase developing a negative pressure (vacuum aka suction)?

That would be a very interesting condition to see in a multicylinder 4 stroke ICE.
If it is a concern a simple filter would alleviate this concern, but given there is no way I can see this being a condition that can exsist for any significant time the oil coated hose with ~5' of length and a few bends is essentially an oil bath filter in of it's self and one of the best types of filters for dusty conditions though a little messy and high maintenance when used as an air intake filter.

 

There would be at least a little protect from the catch can.

but yes I see the point. How do you determine if you’re a lucky engine developing that?

or do we just suggest to spe that they develop a reroute kit with a reverse filter?

 

Again when do you see a multicylinder 4 stroke ICE generating negative crankcase pressure both significant and with a duration long enough to "suck" dirt and dust into the system?

I genuinely would like to here how this can happen.

 

When I install my CCV delete after getting my truck back from the second oil pan leak repair, I plan to put a small high flow filter on the end of the hose. Mainly to keep insects, etc. from crawling in.