FSI Injector Removal
 

Are there any tips or hazards I should know about before I pull my injectors to have them cleaned? I have a mystery tick on my top end that I think I've traced to one of the passengers side injectors?

I am going to try and swap all of the injectors from one side of the engine to the other and see if the tick moves. Anybody here attempted this?

Any help or insight would be greatly appreciated.