Dell OptiPlex 160L - Manual (Page 87)

b. Remove the heat sink by pressing the retention base tab while lifting one end of the heat sink.
10. Pull the release lever straight up until the processor is released, and then remove the processor from the socket.
1 securing clip
2 tab
3 slot
4 retention base
NOTICE: Lay the heat sink down with the thermal material facing upward.
1 heat sink
2 retention base tab
3 retention base
NOTICE: If you are installing a processor upgrade kit from Dell, discard the original heat sink. If you are not installing a processor upgrade kit from Dell,
reuse the original heat sink when you install your new processor.
NOTICE: Be careful not to bend any of the pins when you remove the processor from the socket. Bending the pins can permanently damage the
processor.