Triangulated faces appear on my of my objects

The obects displayed in unreal are all fine except for one object which displays as triangulated faces when they are mapped with texture. can anyone help me out with this problem. The import was from Sketchup as a FBX file. Settings are all left on defaults export and import settings.

Something very wrong with this mesh. Looks like it lose smoothing groups and UVs, and maybe something else… O_o
It needs some cleanup in 3dsmax or other software.