[MPWR]

Two things to make your life a bit easier when you're working back there-

1- Put the bonnet into 'maintenance mode'. On the upper mount on the left side hood strut, there is a single bolt (10mm, I think). Remove it. This will allow the hood strut top mounts to flip downwards. The hood will open up at nearly a 90 deg angle, giving you more room and light to work with.

2- Don't be afraid to stand in the engine bay, between the radiator and the front of the engine. Seriously. It makes messing with that pipe and the hoses much easier. Be careful not to kick the radiator if you're not replacing it.