So I tnink I will share my recent adventure with my Liana. I had been experiencing coolant loss to the expansion reservoir since a very long time. The mechanics, and Suzuki dealerships couldn't figure out the issue.
Despite my insisting that they check all cooling system pipes, they wouldn't and insisted that the head needed to be opened. I was open to the idea, but I kept insisting on pressure testing the cooling system, compression test etc.
None has the cooling system pressurizer, so I made one at home with a bicycle pump and some McGyver style shyte. Turns out the system was losing pressure.
Then I added flourescent water soluble yellow color to coolant and ran the car for about 50-60 Kms. I then checked visually with an ultraviolet torch, and fund coolant seeping through the joint of water jacket.
Next job is to fix that leak. It is a real pain to get ANY thing done in out country.