Valve Cover Change: need help identifying hoses

Going to replace the valve covers this weekend and need to remove some hoses and components. Can anyone help me identify the parts marked #1, #2 & #3. Can 1 & 2 be removed without flushing the radiator.
This valve cover will not come off because the #1 hose is right in the way and although it looks straight forward, there is very little wiggle room unless it is disconnected.
The valve cover on the drivers side is quite hard to pull off, any ideas on how to get it off without damaging it?
Thank you.
2=air injector hose
3=exhaust heat riser valve actuator
You have to drain some coolant in order to remove 1.
You can lay a stick of wood on the side of it and give it a little wack to break it loose or pry gently with a stiff putty knife watching not to bend it.





