The heat break is the thin, shiny silver piece that connects the brass heater block to the extruded aluminum heat sink.
- Unscrew the nozzle
- Loosen screws and remove the heater cartridge and thermistor from the heater block
- Unscrew the brass heater block from the heat break
- Unscrew the heat break from the extruded aluminum heat sink
- Apply thermal compound to the threads of the heat break on the end that enters the heat sink. Do not apply thermal compound to the end of the heat break that enters the brass heater block.
- Reassemble in the reverse and then hot tighten the nozzle
