Apple Xserve (Early 2008) DIY Procedure for Heat Ssink - Manual (Page 12)

Xserve (Late 2006/Early 2008) Processor Heat Sink Replacement Instructions 12
Carefully seat the heat sink over the processor, aligning the four screws with the holes in the 11.
logic board.
Tighten the four captive Phillips mounting screws for the heat sink in the order indicated 12.
below. Do not over-tighten the screws. If you have a torque driver, tighten the screws to 8
inch-pounds; otherwise, try to tighten the screws with equal pressure.
Replacing the Airflow Duct
Lower the airflow duct into position on the logic board. 1.
Note: When installing the airflow duct, be sure to route both the front panel board cable and
the backplane-to-logic board I/O cable inside the channel under the left side of the duct.