I have replaced this hose when I replaced the water pump, and head gasket. There are not much room between the pump and the head. Not sure if you are able the squeeze the hose in without taking out the water pump.

If you are to take out the water pump. Take a closer look at the tensioner, it must tension back. You don't want to find out it would not tension when you put everything back together.

The only special tool you need is a rod that holds the fan clutch, rotate the power steering pump to the right.

Jack