Rick Anderson said:
I just cleaned up my 2.5L oil puking problem.
That is NOT a flapper valve, it can't move, there is a supporting piece of metal at the end to support it. Its a baffle.
The way I've read and sure appears to me, that CCV system works differently than a PCV system is that instead of using a PCV Valve, the CCV system uses an orifice.
The Orifice acts like the PCV Valve in the system to circulate air.
I also cleaned out the valve cover and took apart and cleaned those tubes. There were just baffles, no Reed Valves, nor could I see anything could support a Reed Valve.
I could be wrong, but if the system used Reed Valves, I think more people on the board would know more about it, as well, you think it would be better described in the manuals and literature, which I've only found talking about Orifices.
Rick,
Puking is right! Such colorful descriptive english, gotta love it!:clap:
Anyway, How do you know that yours, the "baffles", had not been modified before you got the jeep? Mine looked exactly like a reed valve plate and reed valve (which looks like a thin flexible flat piece that lays over the opening on the plate and seals the opening until flow from the other side unseats it) where the thin piece had been bent open permanently! Of course I am not sure mine had not been messed with either since it had 225,000 miles on when I got it which is why asked if anyone had ever seen an FSM, drawing, parts list picture, or even bought an inspected a new one, because I was suspicious of the way mine looked when I inspected and cleaned them. The problem is it simply is not discussed or documented anywhere except maybe the dealers parts catalogue with part numbers.
If they are just a baffle, they sure spend a lot of money on hardware for a poor design in my book. (the baffles that is).
You are close on the difference between the PCV and CCV system. There is a bit more to it that one can deduce from the names. PCV is Postive Crankcase Ventilation, and CCV is just Crank Case Ventilation. The PCV requires some positive pressure in the crankase to force open the normally closed PCV valve. The CCV uses an always open, always flowing metering orifice as you noted already. The CCV system ventilates the crankcase much better than the PVC system which help reduce gas dilution of the oil (?) over time.
I would still like to physically see both sides of new one or at least pictures or drawings of how they should be installed or layed out.
Note that mine were bent, not flat on the thin part, and they could be installed facing up (open) or facing down (mostly closed almost sealing off the plate and gas flow).
Wish I had taken pictures of them now.
Perhaps the next person(s) to clean their valve cover would be nice enough to post some pictures of their non-valve (or valve) baffles for us all???
Of course for all I know some one might have made their own baffle/reed valve and stuck it in the valve cover of this jeep? Woudn't be the first time.
For me, getting ALL the valve cover gaskets, grommets, etc to seat and seal and getting a new 2.0 mm orifice (I am using a slightly smaller custom orifice currently) on my small CCV line has solved my oil in the filter problem for over 3000 miles, so what ever I did when I reintalled those baffles (which is how I installed them partly open all the time like a baffle) was not a problem after all.
The tick is getting all the leaks fixed, having a clean small CCV tube line with no leaks and a properly sizied orifice on that line.
For someone who has serious blowby problems they should probably use a slight larger orifice to move more air! I even toyed with the idea of using a neddle valve on mine for a while to fine tune it! Keep in mind that extra flow though the small CCV line (or a plugged no flow condition) will affect idle speed!!!
Now that I say it, think it, some with persistant low idle problems might want to check the small CCV tube and orifice for blockage! I have actually closed mine on purpose (squeezed the rubber tube closed that I have mending a broken tube spot) and watched my idle speed drop by 100 to 200 RPM!