Well the AC stopped blowing cold. Wifey took her to the local shop for a recharge and the tech discovers this. I am guessing the previous owner was trying to save a buck and cap the rear ac. Where can I find a diagram to find out what this part number is? That's the best photo I could take on the ground. Should I try to replace the line then take to a shop for a recharge or just let the shop do it all? Thanks!