Dell PowerEdge R210 Hardware Owner's Manual page 91

WARNING:
The heat sink and processor are hot to the touch for some time after
the system has been powered down. Allow the heat sink and processor to cool
before handling them.
CAUTION:
Never remove the heat sink from a processor unless you intend to
remove the processor. The heat sink is necessary to maintain proper thermal
conditions.
5 Using a #2 Phillips screwdriver, loosen one of the heat-sink retention
screws. See Figure 3-15.
6 Wait 30 seconds for the heat sink to loosen from the processor.
7 Loosen the other heat-sink retention screws.
8 Gently lift the heat sink off of the processor and set the heat sink aside
with thermal grease side facing up.
CAUTION:
The processor is held in its socket under strong pressure. Be aware
that the release lever can spring up suddenly if not firmly grasped.
9 Position your thumb firmly over the processor socket-release lever and
release the lever from the locked position.
10 Rotate the lever 90 degrees upward until the processor is released from the
socket. See Figure 3-16.
Installing System Components
93