Introduction
Use this guide to remove the heat sink. Before reinstalling the heat sink, be sure to apply a new layer of thermal paste.
Tools
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Remove the following ten screws:
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Two 8 mm 5-point Pentalobe screws
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Eight 2.5 mm 5-point Pentalobe screws
 
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Wedge your fingers between the display and the lower case and pull upward to pop the lower case off the Air.
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Remove the lower case and set it aside.
 
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Use the flat end of a spudger to pry both short sides of the battery connector upward to disconnect it from its socket on the logic board.
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Bend the battery cable slightly away from the logic board so the connector will not accidentally contact its socket.
 
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Use a spudger to help lift the free end of the SSD just enough to grab it with your other hand.
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Pull the drive straight out of its socket and remove it from the logic board.
 
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Use the flat end of a spudger to pry the I/O board cable connector upward out of its socket on the I/O board.
 
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While gently pulling the I/O board cable upward near its connection to the logic board, use the tip of a spudger to pry upward on alternating sides of the connector to help "walk" it out of its socket.
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Remove the I/O board cable.
 
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Use the tip of a spudger to carefully flip up the retaining flap on the fan cable ZIF socket.
 
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Remove the following three screws securing the fan to the upper case:
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Two 5.2 mm T5 Torx screws
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One 3.6 mm T5 Torx screw
 
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Lift the fan out of the upper case and carefully pull the fan ribbon cable out of its socket as you remove it from the Air.
 
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Remove the heat sink from the logic board.
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When reinstalling the heat sink, be sure to apply a new layer of thermal paste. If you have never applied thermal paste before, we have a guide that makes it easy.
 
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To reassemble your device, follow these instructions in reverse order.
I recommend that one of the tools you obtain is a jeweler's loupe that mounts on your glasses. It makes things easier.
blairweaver -
This is not correct. You need the pentalobe tool at this point.
Duane Hellums -