I just made a tool to take the injectors out all you need is the right size crescent spanner a length of treaded bar with large washers and two nuts, a hammer head, now cut the crescent end off the spanner and weld it to the treaded bar so it at 90* to the length of the bar, now place the threaded bar through the hammer head, now put the washer and nuts on. Now you have a sliding hammer injector remover, works a treat !!!!