Hi, I recently bought a 14 plate Insignia Design 1.8, after a few weeks the temp gauge started going near the red. Took it to the Garage and they advised the header tank had a slight hole which was causing the leak, this was replaced. a few weeks later I started to hear a squealing sound which got gradually worse. Garage advised the water pump needed replacing which was changed. I have now discovered the coolant has dropped considerably. Any ideas as to what the issue could be. Thanks in advance.