Losing coolant issue

[Joopjbc89]

I took it to a mechanic for a coolant pressure test and nothing was visible leaking but once I drove it around thinking not much of it
Checked the level in the resivour tank and bone try
So guessing it's leaking near the engine and burning and evaporating

 

[greenacc]

It should leave stains if it's drying on the engine. Greeny reddish stains lol

 

[Joopjbc89]

Update it's was the thermostat housing leaking

 

[taptapindustries]

Update it's was the thermostat housing leaking

how did you go? fixed.?
Heres a video on thermostat replacement on the l98

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You could ad a smidge of sealant on thermostat rubber seal that mates to the engine and thermostat housing to improve the seal.
its quite a thin rubber seal.