injectors

Hello. It depends on the type of 3306. Is it a PC or DI engine.If it is a PC engine the injector is held in the chamber by a 15/16" nut. Remove the nut and pull out the adapter,sometimes this is tight,if so screw the pipe back on and prise it free with a screw driver.Unscrew the injector from the end and screw the new one on FINGER TIGHT ONLY. Reassemble with new o ring on the nut and new seal under the pipe.If it is a DI engine let me know how the injector is held in the head, I can then tell you the procedure.