I thought it was off the back but it looks like the thermostat housing is leaking and really bad- so will swap this afternoon

It seems that it is coming off the back of the engine- I will check the pump as well-

I guess I forgot to say that I see puddles under the thing- I did put a new tank and cap on and now it holds pressure- it's weird that it will dump coolant after 2km then be okay for 1200

010 xc60 3.0 T6 325000km- so about a year ago the low coolant warning came on and I poured in about 500ml of coolant- kept checking and it was fine, last week took a trip and all was fine until I stopped for a bit on a hot day and drove away after 30 minutes- the warning came back but it was only ab...