That plate a is supposed to be a heat shield to assist in stopping radiant heat getting to the intercooler. Why it has oil soaked it if? Your intercooler is leaking boost pressure and oil vapours that enter the air intake from the crank case breather to before the turbo are also leaking out. Two things you need to do here . 1. Buy a new welded intercooler, not one with crimped end tanks as they leak from factory. 2. Instal an oil catch can. This is a filtration system that goes inline from the tube that runs from the rocker cover to the intake pipe (after the air box and before the turbo) this will remove the oil vapours.
Oh and 3. Getting an EGR blanking plate and block that off too. This will stop dirty exhaust gases going back into the engine.


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