Remove ac compressor and let it hang you will have to fanagle it around to get the bracket off/on .I just let the bracket assembly hang down alittle and took care of the plug and reassembled it all. Put some loc-tite on that plug as well as alittle oil on the new "O" ring.I did the same one on my truck after I got it, I just replaced the one in back on the pass. side(down pipe was fun to work around) a few weeks ago. Thank god for freinds that was a 2 man job on that one.