I took the winter cover when I had my last service. It sounded quite good, with a check of the engine cooling system, flushing and renewal of the engine cooling fluids, 6 months/10K miles warranty on the engine cooling system and 6 Months AA cover, all for just £39.
For the last 2-3 weeks I've noticed the coolant level in the expansion tank to fall to the point it was almost gone.
I booked the car for a check up and was checking the engine bay on a daily basis for traces of a leak.
I found residue of antifreeze (greenish powder like) all over the air-condition pump and the following day I also saw the pump been wet with antifreeze (it was a dry day). I then noticed that there was residue on the hose that goes over the aircon pump (highlighted in attached image).
It seems it is coming from a metalic joint or something where a sensor of some type seems to be housed.
The weird thing is when I went to the garage they performed a compression test that (according to them) showed no leak, and refused to touch the car! their reply was to keep topping up the reservoir and come back another day...
I'm well p*ssed off at the moment and I'm about to call Vxl customer service to clear this out. Can someone give me some insight on the names of the suspecting leaking parts?
p.s.: I've got the 1.6 16v (X16XEL) engine which is a bit different from the image, but the highlighted part looks quite similar.