sboothd

I have a 2013 1.6 Octavia and have been losing coolant for 3/4 months, intermittently, but more regularly on motorway runs. After having a pressure test done showing no leaks at my local vag specialist I went to Skoda main dealer. They think it’s the charge air cooler leaking internally and want just shy of £1500 to replace it. However, I’m not convinced they’re correct and done want to waste that amount of money. I’ve noticed that the coolant is coming out of the relief valve on the expansion tank, as it’s wet underneath and the uv light shows the coolant residue there. Could this still point to a charge air cooler fault? Thanks