last month a a friend of my mothers backed up into my rear driver side fender. i had the dent taken out but im getting a funky noise from the back left coilover. it seems to handle well, when i push on it seems to work fine, and when i go over spped bumps all is well.. but when im driving and i hit tiny bumps (even cracks) in the road the rear coilover seems to kinda rattle like somthings lose. im gonna jack it up and take a look see. any sugg. on what i should look for?
thanks oliver

 

top nut.

 

lol can do