protyne

hi guys

I noticed my coolant level has dropped around 0.5L within the radiator after a month of driving. There is no coolant level change in the overflow tank be it hot or cold.

My coolant temp is averaging 180-185F hence no overheating here. Oil and coolant both look consistent and do not suspect any mixing. Checked the amco silicone coolant hoses installed new few months back and did find some crystalised coolant on the stock rubber hose leading to turbo which I'm planning to change.

What else should I be looking at for this loss? Why does the coolant no drain back into the radiator from the overflow tank and loss is only within the radiator?

Thanks in advance!