Mesh Fix tutorials?

I’ve been told by other modelers that there is something wrong with the mesh in some parts. I’ve looked everywhere, but I either can’t find the tutorial for my version of Max (2011), or they don’t work in solving the problem. Anyone have any ideas on how to fix this problem?

http://th09.deviantart.net/fs70/PRE/i/2015/041/3/7/tfu_optimus_by_maddogsamureye-d8hix05.png

Try

Edit Mesh>Elements
Hide the parts that are fine
Switch to verts
Ctrl+A
Scroll down under Edit Geometry
Weld with a threshold of 0.01

It worked! Will post pics soon.