Really.....wow that's crazy. You need a crows foot to remove it from the pass. ex. manifold and just remove the egr valve with the other end of the tube still attached to it then remove the valve from the tube (this is way easier) the junkyard is your best bet for the tube and if you dont have a crows foot you have too take off the ex. manifold to get it off so in short get some if you dont have any.
That sucks...at least it's a cheap fix and sometimes easy, and just to be sure its not one of the two rubber heater hoses coming from the tube is it if it is thats awesome cuz thats like crazy easy to fix either way hope i helped you out