One would think that computers are not in need of regular maintenance, in fact they are. After some time in operations - months or years, any original lubricants are gone. Recently, SVBUG was gifted several servers that had seen their prime, but were still useful. A little Oil and Lube did the trick.
Here are a couple of Tutorials on :
How to Remove and Apply Thermal Compound By Jeremy Blum (aka sciguy14)
http://www.youtube.com/watch?v=I3gx6c62D7I
Quiet noisy computer fans with a drop of oil by Greg Shultz
http://articles.techrepublic.com.com/5100-10878_11-5034842.html
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