Car has been using oil at a decent rate in boost. Compression and leakdown are good, not a lot of miles on a fresh build. PCV was hooked up just like stock with the valvecover vent going to the intake on the turbo suction side. I removed the intake manifold where I found oil pooling from the PCV line. I figured disconnecting the PCV alltogether and venting it to atmosphere while leaving the valve cover vent going to the turbo suction would be a simple solution. In doing so, it seems oil consumption has dropped considerably but I have a very large accumulation of a milky thick sludge and water vapor in the line going to the valve cover vent. No evidence of this is in the engine itself. Is this just from a lack of crankcase vac? A mixture of oil and water vapor from the lack of PCV system? Will a catch can solve all these issues or do I have something else worse at hand?

 

I would run the vent hoses coming off the valve cover to a catch can... once you have a catch can setup you will be disgusted when you see what all is going into your intercooler, piping, and turbo. The only venting I have is two hoses coming off of the valve cover running to a catchcan. It gets half way full every 3 or 4 months.

The milky sludge is more than likely moisture in the hoses from the heat escaping the engine combined with this cold *** weather. Ive noticed this before on my car as well.

 

What's the big difference between that catchcan setup and the ones that drain back?

 

all u need is two off of the valve cover don t use the one s on the back of the block
the only thing coming out is vapor.......

look at this dyno of our dragcar we don t even have hose on the fittings lol
-see nothing but vapor comes out if your motor is fine....
http://www.youtube.com/watch?v=FGedfheB-FM

 

word. that'll be simple as **** to make at work.

 

lol
two cheap fitting from summitt

 

Nah i meant a 2 line catch can with a breather filter on the top.

 

i dont know why everyone is continuing to beat on the no drain back setup when it has been beaten to death the fact that it is not a problem at all. t1 clearly justified that it is fine to have a catch can oil return.

you should get a catch can with 2 vents off the front of the valve cover (the front of the valve cover has 2 baffles or you can go off the back of the valve cover but you will need to add a baffle on the inside of the valve cover) and have atleast 1 return to the back of the block.

 

Alright. There seems to be much debate on weather or not one should VENT the catch can as well. Seems most are vented, however the arguement seems to support that it will allow moisture to build in the oil. The theroy makes sense to me especially if you are in colder weather like I get in the winter. Its been around 32 in the mornings on the way to work recently so I need to take these things into consideration. This car is going to be my daily driver so I would REALLY like to get a handle on the oil consumption issue and put any worries behind me.

EDIT: also, this is on a single cam engine... so I don't know if the "dual baffles in the front" theroy would apply. I will check into it today since I have a spare valve cover I can check out.