What is this? It was leaking and hissing green fluid which I think is antifreeze and started smoking. It's the one more to the right, my engine was running hot for a sec and then when back to normal? No idea what's going on, any ideas?

 

if it's a neon green than it's AC refrigerant. Those aluminum lines are AC lines not radiator lines. If I were in your shoes I would find a good 3rd party mechanic that specializes in cooling & AC systems and have them fix this - it's dirty, could be poisious and not really a DIY project.

 

That is the condenser line to the ac. The fitting has popped off as you can see the o ring. You will need to bri I to an ac shop to fix the line change the receiver dryer vacuum down and recharge

 

Welcome- those are definitely a/c lines and require a special collar tool to separate. Bealljk is right- go to an a/c specialist in your area to get this corrected before further damage is done to your a/c system.