Maintenance help

Discussion in 'E3D-v6 and Lite6' started by Siggi, May 25, 2023.

  1. Siggi

    Siggi New Member

    May 25, 2023
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    I have a second-hand Prusa i3 MK3S with a Bondtech extruder upgrade and what I believe is an E3D V6 hot end.
    Does this look like the gold version? Would that have a copper heat block? How would I check?

    It seems the heat break clogged, so I dissassembled the extruder and the hot end. I was able to unclog the heat break by pushing the lump through, but now I'm wondering about re-assembly and possible parts replacement.
    The threads on the nozzle were covered in a white/gray substance that I'm not sure belongs there, and the nozzle doesn't thread freely into the heating block as-is. According to the assembly instructions, there should only be heatsink compound on the cold end of the heat break. I freed the hot end of the heat break from the heating block, and it too is covered in the same substance.
    I'm a total n00b at this, so please be gentle, but I'm wondering:
    1. Could this substance be heatsink compound and/or perhaps boron nitride?
      The stuff is dry and hard/powdery.
    2. Is it safe/sane to run a tap through the heater block to clean up the gunk?
    3. Is the nozzle reusable, or should I just replace it?
      This is a second-hand printer, so I have no idea how much time there's on this nozzle.
    4. Is there any reason I should change the heat break or the heater block?
    5. What, if anything, should I use for heatsink compound on cold end of the heat break?
    6. Should I worry about something for the hot end and the nozzle?
    7. Does anyone offhand recognize the thermistor and/or the heater in that picture?

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