Macbook pro 13in back case clicking noise when flexed? (late 2013)

Question

Yesterday I noticed that when I put a moderate (but by no means excessive) amount of pressure on the back of the case in certain areas with my thumb, there is a very audible clicking noise produced when the pressure is released. You can also feel resistance or a change in flex which to me, feels as though the case comes in contact with something on the inside of the computer, although I really can't be sure. It feels almost sticky when the pressure is released and the sound happens. What I'm wondering is, has anyone else experienced this, and if so was anything actually wrong, did it lead to issues etc. or is it just how the case sits. I looked at a display model of 13in late 2013 retina and it did not have this sound or feeling that I could tell (but still had similar flex). The 15 in late 2013 was much sturdier than the display 13 in retina and the old 13in without the retina screen felt like a solid piece of metal in comparison to my laptop. Here's a picture of the areas I can hear the sound when pressed
It's not really the flex I'm concerned with, I am aware that flex happens when you have thin pieces of aluminum. This weird feeling and sound just don't seem normal to me. Please if you have a late 2013 13in retina, let me know if you hear or feel anything when you press here!

Answer 1

Hi f,
I know you're looking for someone with the same model MBP as you have; sorry, I don't have one, but I'd like to point out a couple of things.
You already know that not all of them make that noise, as you've tested a display model. Because of that, I would definitely bring my MBP into an Apple Store and have them look at it. If you're still within 14 days of purchase, you may even want to consider a return and get a new one.
Another point: if there is something amiss with your MBP, continuing to make it "click" could be causing harm, and I would stop doing it immediately, tempting as it may be. ;-)
If the clicking is caused by picking up your MBP with one hand, use two hands to pick it up. As you've noticed, the case is rather "flexy;" this flex, exacerbated by picking it up with one hand, has caused internal hardware problems with MBPs and PBs in the past. If memory serves me, they used to put it in the owners manual; if they don't anymore, I think they should. Two hands.