In this quick tutorial I will share my experience in removing an E3D
    V6 hotend  broken heat-break stuck in the heat-sink :
  
Step 1:
If this is an E3D clone, make sure the heat-break is not glued into the heat-sink, use some acetone or any diluent, you may need to heat it to make sure anything in the thread will melt and dissolve.
Step 2:  
  Find the right Torx head that fits your heat-break hole, in my case T20 Torx head fitted well.
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          Torx head has a good grip | 
      
Step 3: 
  
    Place the Torx head in the heat-break, and a few gentle hammer taps just
    for the T head to sit tightly. 
  
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          Torx head fits inside the heat-break | 
      
Step 4: 
  
    Unscrew the heat-break, if you find resistance try heating the heat-sink,
    or use solvents.
  
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          Unscrew the heat-break | 
      
And Voila !
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          Never thought it's that easy | 
      
Warning: Don't forget gloves and protection otherwise you will unscrew yourself not the heat-sink.
  
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