Apple Xserve Intel (Late 2006) DIY Procedure for Heatsink - Manual (Page 4)

Xserve (Late 2006) Processor Heat Sink Replacement Instructions 
Caution: Try not to completely remove the screws from the airflow duct. Tiny black rubber
washers hold these screws captive on the underside of the airflow duct. If the screws are
completely removed, these washers can easily fall into the enclosure and become lost.
Processor Heat Sink
Note: Although the illustrations in this procedure are based on the heat sink that is farthest from
the DIMM slots (CPU B), the steps are the same if you are replacing the heat sink for CPU A.
Loosen the four screws securing the heat sink in the order indicated below. 1.