Hey everyone thanks for all this I noticed a rattling noise from under the bonnett yesterday took it to ford thinking it was a turbo problem only to find it was the exhaust gasket but after reading all this I will be removing the screen ASAP. Just have a few questions when removing the screen and piping do I have to drain the oil from the car if so how many liters does it take and what should I put back in it, and also when I put it all back together and put the oil line back onto the car befor I connect it to the turbo do I have to purge the line with oil befor start up if so how do I do it thanks to everyone for your help sorry if I asked questions that have already been answered hope my car lasts a bit longer now!!!