Front: Done
Engine bay: Done
Tips:
A lot of the coolant hoses around and to the throttle body/water pump are showin in the "Oil Cooler Hose" diagram in the official Acura parts diagras like this one. Don't be fooled.
Not every hose looks exactly like the diagram. Sometimes the diagram will illustrate a hose as being longer than it actually is so the ends will line up with the hard lines or in the diagram. Sometimes the hose will even be a different shape! (I only ran into this once...a hose that was pictured as straight actually had a significant bend in it.
Don't be shy about pulling parts off if they are in the way. Four bolts, a couple of connectors and some coolant hoses will get the throttle body out of the way. Ditto for that vaccum hose distribution bracket that is on top of the throttle body.
It's nice when you can replace one hose at a time...makes positioning the new hose correctly a snap. But you can't do that most of the time in the NSX...too many hoses in the way of other hoses. If you have a good mechanical memory it shouldn't be a problem. Just keep the parts diagrams handy. But if you tend to forget how things were arranged, take pics as you go. You won't really have any problem getting each hose on the right hard lines or reconnecting the various electrical connections you have to unplug. But it isn't that hard to mount a hose backwards. (I only did this once and eventually it became obvious). Or you might find a hose is not oriented correctly and you have to unclamp it to striaghten it out and other stuff you have already reinstalled is in the way. (I didn't have that problem but I could see how easily it could happen.)
Take your time. This advice appears in almost every coolant hose thread and I can't emphasize it enough. It's about 100 in the garage and worse in the sun this weekend so I only worked for about 15-30 minutes between long water breaks. Things always went smoother right after a break than toward the end of a long work session. If a clamp or hose was giving me trouble, I would take a break. Afterwards the same job was easy.
Replacing all those coolant hoses is really a pretty easy job but its easy to mess up or do damage if you hurry or get impatient.
Next weekend I will take care of the five hoses under the car. (I hope there's only five 'cause that's all the new parts I have left.)