So I've looked over the link from another thread. http://www.audi-sport.net/xf/threads/how-to-guide-pd-tdi-injector-adjustment-clearance-lash.183040/ But I'm still a little bit unsure, so just wanting to confirm... Turn the engine over until the rocker for the injector I'm adjusting is at its highest point, So not pressing down very much on the injector? Crack off the 18mm locking nut Put the Allen key into the hole and unwind it all the way, then start winding it down by hand lightly until