Oil around the Intercooler coupler on inlet

[97ClipseDSM]

Well first off I own a 98 GSX. The car at this second has 58k original miles on it and I havnt had any major issue with it yet besides a small one which is kind of annoying me right now. First off, I got a brand new MHI EVOIII 16G that now has about 500 miles on it so Im pretty sure this is not a turbo problem.

Well today while i was just looking around my passanger side fender i decided to take a look at the stock sidemount. Upon inspection, I found dark oil all around the intercooler coupler on the inlet, kinda like it was seaping through it or something. I immediately pulled the intake off the turbo, and checked for play and oil inside, absolutely none. Car boosts fine, runs fine, with the exception of this problem. Any ideas on what it could be, there were a couple of small drips on the floor near the IC but mostly the coupler was covered in oil that looked pretty old/moist. Im not running a catch can, the line runs directly from my valve cover into the intake. My only concern is, what would cause the oil to seap through when all my clamps feel so tight & why is the oil there in the first place. I could understand maybe a drop or 2 but the whole coupler covered in old moist oil?? I do remember being a quart over the last 2 oil changes but would that cause the IC couplers to start leaking & I do remember doing some WOT pulls a few times this past week. Sorry if it sounds like newbie questions. I know my fair share of stuff but this one small issue has gotten me thinking.

Regards

 

[justin0469]

Most likely it is just from your VC. The easiest and cheapest way to fix that is to get a small inline fuel filter from walmart and cut the line going from your VC to intake and stick it in between. They are also clear so you can see when you need to change it. And make sure you follow the flow arrows.
If you do a boost leak test and you aren't leaking at the couplers, your couplers are fine.

 

[DGajre777]

Yes, it is from your valve cover. Run a catch can.

"The vent hose that runs from the valve cover to the turbo inlet hose puts a lot of oily blow by into the intake tract and intercooler and piping. When oil builds up inside the intercooler, it drastically reduces the intercooler efficiency. To prevent this, many people install a filter onto the end of the hose instead and put a plug on the fitting where it went into the inlet hose. Cheap fix ($10 for the filter) but it makes a mess now in the engine compartment instead of inside the intercooler pipes. This new smaller catch can will hold the oil that blows out, it also allows you to gauge how much oil is coming out."

Source: http://www.roadraceengineering.com/eclintake.htm

Install instructions:
http://www.roadraceengineering.com/instructions/catchcaninstructions.htm
http://www.roadraceengineering.com/instructions/greddycatchcan.htm