Apple Xserve Intel (Late 2006) DIY Procedure for Thermal Grease Kit - Manual (Page 9)

Xserve (Late 2006) Thermal Grease Kit Instructions 
Carefully seat the heat sink over the processor, aligning the four screws with the holes in the
logic board.
Tighten the four captive Phillips mounting screws for the left processor heat sink in the order
indicated below. Do not over-tighten the screws.
Repeat steps 1–3 for the right (CPU A) processor heat sink.
Note: After installing the heat sinks, be sure to re-install the airflow duct.
Closing the Xserve
Replace and secure the cover.
Slide the Xserve back into the rack, and tighten the front thumbscrews to secure the Xserve
in the rack.
If the server case was locked, use the enclosure key to lock the security lock on the front
panel.
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