Post-repair macbook pro issues...

I just had the optical drive repaired on my MBP, and everything works fine right now, except for two things:

1. The optical drive is considerably noisier, and

2. The casing just above the drive is a bit loose and makes a popping noise when put weight on it (such as my wrist) and take it back off.

Is there anything I can do to fix it myself? It’s not a huge problem, which is why I can’t send it back to Apple, but it’s just really annoying. Thanks!