Replacing PTFE tube in Mk8 heatbreak I am trying to replace a Mk8 heatbreak on my printer. But which orientation do I need to put into the heatblock? The left image or the right image? Note that this specific heatbreak is missing a PTFE tube. ![enter image description here]( ![enter image description here]( I quickly looked at the other questions on this forum but could not find a clear result with images.

The PTFE liner should be in contact with the nozzle, and is normally cut half a millimetre over-size to ensure that it remains in contact.