Remove the following 9 screws and 2 nuts from the heat sink:

Four 3 mm Phillips from around the fan and the heat sink bracket. The bracket can also be removed at this point.

One 11.5 mm (left) and one 4.5 mm (right) Phillips from the plastic fingers of the hinge grill.

One 4.5 mm Phillips at the top right corner of the heat sink.

Two 6 mm Phillips on the lower left corner and face of the heat sink.

Two 4 mm screw nuts with attached springs from either side of the heat sink.