Hello - sorry about the frustration. I haven't changed one on this vehicle yet......but they can be extremely difficult to get to. Some I have had to climb inside the engine area and kneel on the engine. Some I have been able to come in from the bottom to remove the tube. The directions, attached, don’t provide any hints. I also don’t know the variety of tools you have which can be a problem if you don’t have a variety. I am sorry I can’t provide you much more than t this.