The silver is a new Puralator and the stock is the other.
Why does one have a check valve in it like I'm used to seeing and the stock one have no check valve?
You can see a small hole through the stocker while the replacement does not because of the check valve.
The stocker is marked with an ACDelco logo and a CV 2001 C 15
The stocker also has no rattle to it when you shake it.
Any reason why one would be better or worse than the other?

 

The orificed PCV was instated to cut down on oil consumption. It wasnt used in older NBS trucks. Soemtimes it works and sometimes it doesnt. Depends on the setup I guess.

 

So basically its good forever or until the orifice rusts out to a larger more oil belching size?
All I can say is the new one pushed out of the hole on a short drive to the hardware store, then after about a 16 mile ride home was about half way out of the valve cover again.
I checked the hose for vacumn with and without the new PCV and it was very strong, I wonder if the positive boost pressure is pushing it out??
Looks like eliminating the PCV system is looking better all the time, the only thing I don't want is the continuos smell of oil coming from a breather type filter.

 

Good possibility. Metco's big breather might be a good idea.

 

TGO2Z71,

Did you intall a check valve on the hose that runs from your throttle body to your passenger side valve cover? If you didn't, that would be your "boosted crank case problem".

Jeff

 

The STS kit comes with a solenoid cintrol valve for this reason, I just am not sure if it is working properly or not. I'm going to send off a e-mail in the morning to STS and ask if the issue I am having with oil belching out the filter in this pic are normal under higher boost, or any boost for that matter.
The filter that came with the STS kit was just a fiber material sourounded by a plastic sheid, like one found in the air cleaner assembly on a carbureted vehicle. I replaced it with this motorcycle type crankcase vent filter.
One of the lines in this picture goes back to the uper TB passenger side. The line from the passenger side valve cover first goes into this control valve and then to the TB.

 

Which PCV valve is better? I have the check valve style and I am having major oil consumption problems and am going to swap in a new PCV valve in hopes that, that is the problem. I didnt see the small orifice one at the autoparts store.

 

The orificed type will help. But sometimes high crank case pressures will push it our the dipstick out. You try a catch can yet?

 

No havent tried a catch can yet. Im going to replace the pcv first then go from there. I still plan on putting a catch can on there but not until I do my intake/head/cam swap this summer.

 

I've had some ideas on why I got the oil blowing out of my crank filter under boost.
When this hapened it was weli below freezing, days before that is was above freezing.
When its above freezing the condensation inside the engine can vent properly, under below freezing temp I think the filter soaked in condensation froze up almost solid.
The oil and crank pressure had no where to go go so it pushed out my dipstick and ulitmately blew oil out the breather filter under hih crankcase pressure.
I put a half assed catch can set-up on just to keep oil from starting a fire by dripping on my exhaust.
After checking the inside of the catch can, there was a very small amount of oil, and a good amount of water. The crank filter steams quite a bit when the engine is warm and it cool enough out here to see it steaming. It's doing its job when you see staem coming out of it, but as soon as its soaked in engine oil it cannot vent properly after freezing. Pressure builds and something must give. I also saw a lot of milky oil/water crap inside my dipstick and under the oil fil cap.
Now that the crank filter has been cleaned, no more milky crap and its venting properly.
I'm making a catch can that catches the oil, then it will vent to a water seperator and then vent the final air out the same filter, oil and water free.

I don't think I'd see half these issues if it were not for the ocasional 15-20 degree days here.