Yep thats identical to mine. I've got VAGCOM but my car doesn't show any errors at all. The reason i was thinking down the lines of a split in a hose was because the noise is the same as when you have a split diaphram on a DV. One of my mates had a hole in a boost hose the size of pin which was untraceable by eye, as soon as some air was forced into the hose it would expand to the size of a 5 pence piece! The only reason I thought the noise went away after the car was warm was because the hoses would get warm/soft and the split/hole wouldn't open as much!!!! Just a stab in the dark though.
I've got to book my car into a VAG specialist soon for some bits to be done so I'll ask them to check the hoses with a pressure test.
So, update time.
Just returned from MSD, who are doing the clutch and I am recovering from an expensive meeting. Plenty of meat on the clutch, but it has been terminally damaged by oil via a leaking gearbox oilseal, but a replacement clutch was expected. Dual mass flywheel is also damaged and this was not expected.
To get to the "chirping" point: with the gearbox out, access to the turbocharger is very much easier, as is access to the relevant hoses. The turbocharger shows significant bearing wear: insignificant end float but substantial vertical movement of the impeller shaft in the housing. I will put a dial guage on it and report further, but comparing it with a new turbo (where vertical movement is nominally nil) clearly shows the extent of the play and the wear. Whether this is the cause of my "chirps" we will find out when the new turbo is fitted. All hoses looked good.
Incidentally, the air hoses from the turbocharger had evidence of oil mist in them. The understanding is that the bearings in the impeller shaft in the turbo are designed to hold oil pressure to float the shaft in the housing and when the bearings fail, oil is seeps past, thus failing to support the shaft, the oil then gets into the hoses.
So money is flowing out here: clutch, dual mass flywheel and turbocharger, oil supply pipe and gaskets and all plus labour!!.
Internet next to look for the best price for a K04 turbocharger. When the installation is complete and the car is back on the road I will let you know whether it "chirps" or not.
"Chirping" noises = fckd turbo is not what I really wanted to hear!! Wonder whether the vanes on the impeller shaft have been touching the housing, or whether the "chirp" is just dry bearings?????