Before doing this you should get a low damage weapon that has a fast attack speed - such as the white items sold by Dalaran vendors.
Find your weapon dealer by searching on WoWHead:
Weapons - Items - World of Warcraft
Click your 'Type:' - then search and sort it by attack speed.
Once you have your weapon:
1- Go slightly west of K3 to the wreckage zone [Picture 1]
2- Aggro a Savage Hill Scavenger [Picture 2]
NOTE: Some of them won't aggro, they'll always evade so ignore those ones
3- Pull them to the nearby Tauren looking for parts - he will fear him away which is what bugs the gnoll [Picture 3]
4- The mob won't attack and you can beat him until he's dead - note it gets more annoying at higher levels because you will be doing more damage, but it works really well. [Picture 4]
To make the mobs last longer you can take off your gear which won't matter because they won't hit you back.
Hope this helps!