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Hi all, I have a leak in the air intake system after the turbo, causing an almost total loss of boost. I first went under the car and found a significant amount of oil coming from just after the turbo, in what felt like a split where a short metal tube joins the turbo output. It seems like it's held on by one small bracket, which it hinges around. I've attached a diagram indicating the part. Does anyone know what that part is, and if it's supposed to be mounted like that? It definitely doesn't feel very solid. Split indicated in red. I then found what I think is the actual air leak, just under the inlet manifold. There is a lot of black gunk built up around it. I can feel the air coming out from under it, however I can't see it. It looks like to find it exactly I would have to remove the grill, radiator, and possibly the manifold itself. That's a fair bit of work just to put it all back together again. Has anyone else encountered this issue before, or have an idea about what might be causing this? The air can be felt somewhere around the flexible hose coming upwards, but I can't find exactly where. Thanks in advance for any help or advice that anyone can offer.

Ladies and Gents, I have a 2003 2.5 CRD with about 141k miles on the clock and I too have been losing coolant. Last year I realised that my thermostat was stuck open and the engine was taking ages to warm up. I then fitted an extra (working) thermostat to the top hose, and life was good... A month ago I was driving on a motorway and suddenly the temperature gauge went off the scale. I pulled in at a garage and found that the coolant level was very low. I topped it up and managed to limp home. I then removed the top hose thermostat and replaced it with a new one. I tested the old one and it did seem to stick. I hoped that the new thermostat would do the trick but I found that I am now having to add about a litre of coolant after every trip :-( After a long run I found that there were signs that the coolant had leaked in the area under the rear right side of the engine. There was also a pretty even film of coolant on the back of the car. I think that the leak is external and that it gets sucked up onto the back of the car when I'm moving fast. The engine is running smoothly and there is no sign of water in the oil. The exhaust is not smokey either. Do you have any clue as to what is leaking - is it a hose? Has anyone had this problem before? As always, very grateful for any advice that you have. Cheers, Argee