Cheers for this just did my ohs based on this, one pro tip is use the spanner on nut towards the top of the injector to easily turn and work it free. Also a great tool for removing the seal is a tent peg with a point ground into it with a grinder. Whole job took me an hour and most of that was finding where I left the bag with the new seals in. Toyota garages can supply the parts for a tenner if your not near Lexus.