Bongo Fury

Hi again
With reference to my post regarding oil deposits.
I now have identified that it appears to be comimg from the bolts which attach the
inlet manifold.The two bottom end bolts.The one nearest the front of the vehicle is worst.
Will it be a problem with the inlet manifold gasket ?
How serious is this.As I said before there is no change in my oil level.No oil dripping on the ground.
Am i just worrying about nothing ?

its probably just gunk from the egr and is why some blank off the valve

Agrees with Rob, I've seen it on a few but often l wonder that if gunge can get out then air can get in, not so much a problem with a diesel engine but some turbo boost could be lost on a TD