"This drive has also been making search-loading or whatever you want to call it noises."
Do you mean that scratching type noise when you first boot up?
1. Does it happen at random or only when you copy files onto it?
2. Does it happen when the computer is idling?
Listen through the sounds of the WD HDDs and tell me if your HDD is making the same noises: http://datacent.com/hard_drive_sounds.php
Also, 50C+ is a bit warm for an HDD. After some research, a working HDD should be sitting around 35C-45C.
If your HDD is making those sounds etc. It mostly likely means that you've got a faulty HDD. Back up any data thats on it and get it replaced ASAP