FYI in the picture posted I see MK8 extruders. These are not what is on the ender 3. Not even the same type. MK8 in your pictures are direct drive and the ender3 has a Bowden setup. Just saying. I know my extruders well. I have changed so many right here on this forum. So many. apples and oranges. This is why we should go join facebook groups for our specific machine.