5 - 20 minutos
Macbook Late 2008 Aluminium was a bit too old and when I tried to run XBMC kodi and Eclipse Luna. The temperature gauge pro always pop that my CPU temperature is getting hotter. I decide to replace the heatsink and the thermal paste as well.
It did not go smooth even I had the iFixit pro tech tool kit. I think when I did the first attempt which is removing the logic board I was too excited to use the tool kit so I was really in a hurry. It happen the thing that I don't like to happen which stripping the screw :( it was a bit of a struggle but after using different type of approach of getting stripped screw out I solve it using a rotary tool kit with the help of screw extractor from Ifixit took me for about a month to solve it.
The first advice I want to give is to be patient on small screws.
Think everything is easy and entertaining and don't give up when you see struggle. I would like you to think it this way first attempt is not always good but the more you do it the more it you get the hang of it.