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| - | [* black] Lift and remove the heat sink assembly from the logic board. |
|---|---|
| - | [* icon_reminder] When reassembling your iMac, follow our [guide|744|thermal paste application guide] to reapply the thermal paste. |
| [* red] Loosen but do not remove the four captive T9 screws securing the heat sink over the CPU. | |
| [* orange] Remove the two 5.4 mm T9 screws securing the heat pipe to the logic board. | |
| [* icon_note] Some iMac models have a straight heat pipe rather than a curved one—regardless, the screws will be the same size/type and the ones over the CPU will be captive to the heat sink. |