Coolant leak

Can you get a couple pictures of these lines? Are they going around the thermostat housing or are they coming from the housing?

Also when you say they leak under pressure, are you pressure testing it like in this video below? How much pressure are you putting on them or do they leak under normal pressure when the engine is running?

https://youtu.be/W8kra65m15c

Take a look at the diagrams below that will show a little more detail.

However, if you can get some pictures that will help us identify them for replacement.

Thanks

Unfortunately the link that you posted provides an error. If you can just attach the pictures using the link below "Add image or video"

Thanks