Its the valve cover breather. The excess oil thats in the valve cover get blown out through that hose and into the intake, bad bad bad, and it goes into the turbo, then the lower pipe, to the intercooler, and then to the upper pipe and into the intake, you do the math.

 

go to pepboys a buy a clear cheap inline fuel filter. it will only be like $3. on the passenger side of the valve cover is a tube that sticks out with a rubber hose that runs to your intake snorkel. pull the line off the intake and attach it to the fuel filter. i did the same thing and currently just letting it hang against my tranny. i then capped off the nipple on the snorkel.

 

I recommend making that hose either VERY VERY short and letting it dangle there, or keeping it long and making a simple mount somewhere so its not just in the way.

 

1) Just go to Pep Boys or wherever and get about 2-3 feet of hose that's the same size as the current breather hose (the stock hose will be too short). I think it's 5/16", but I'm not sure. Yes, the stock hose is metric, but you can find SAE sizes that are within fractions of a millimeter of the same size. It'll fit. And it's only about $1 or so a foot.

2) Unhook the stock hose and connect the new hose to the valve cover nipple and run it down toward the ground. No catch can needed and no inline fuel filter catch can to clog up and restrict flow.

3) Get some vacuum caps to plug your intake pipe.

4) Clean your intercooler.

5) Enjoy.

 

I've had other tell me its bad to just cap it off and let it hand cuz you loose the pressure in the case.

 

Well, I have no idea what "loose pressure in the case" means, but I've had no problems with mine in the year or so I've had it this way. And besides, what do you think a catch can is doing? It's the same thing, it's just providing somewhere for the oil to go besides onto the ground.

 

The line into the valve cover should be filtered or dirt will be pulled into the engine by the pcv system , that's why the hose was originally connected to the inlet tube after the air filter. Oil is pushed into the inlet tube when the crankcase pressure is high (when your making boost) because the pcv system can't flow enough to maintain a slight vaccum in the crankcase

 

Now that makes sense. I have been planning on getting a "real" catch can one day, actually. Jaz has a pretty decent looking one that's not too expensive.

 

I had gone and picked up a little filter for mine and now I just wanna get a catch can. It just makes a big mess in my engine bay now, cuz it's a lil mini pos lol; however, i stopped all that crap from running through everything

 

I just got one of those breathers on my head, too. At least it makes LESS mess in my engine bay than before, but why would the stock oil breather line go into the turbo? What's the point of Mitsu doing that, if it's so bad?
And I found an expensive kit with a catchcan and breather filter for the crankcase...

RRE\\

 

I went the 'inline fuel filter' route. It's simply inserted between the crankcase vent and the intake pipe. I've been running this way for about a year, and there's no oil in my intake anymore. I do, however, replace the filter with every oil change. It's only $3.

 

I went the 'inline fuel filter' route. It's simply inserted between the crankcase vent and the intake pipe. I've been running this way for about a year, and there's no oil in my intake anymore. I do, however, replace the filter with every oil change. It's only $3.

I do the same thing: inline fuel filter, replaced every oil change.
I found mine at Pepboy's, Purolator part # 23170 if anyone's interested. It was $2.99.