20 - 30 minuten
The right fan on my 15" MBP started making alarming noises. I figured it would fail completely soon, so I ordered a replacement fan from iFixit.
I actually got the existing fan working again-for now. Using the guide on iFixit, I extracted the noisy fan, took it apart (there's only three parts), dipped the fan shaft in lithium grease, and reassembled the whole thing. The noise stopped-for now, at least.
You would think that I could have done this just using the Guide and without ordering the $40 part-I wouldn't recommend it. My experience is that parts like fans stay fixed for only so long; once they've begun to fail, the process is pretty much inexorable. Having the new fan on my desk for installation at my convenience is a lot better than having it break at its convenience. Plus, buying the part supports iFixit and keeps the great Guides coming-buying a part I may not need for a couple months is a LOT cheaper than paying Apple to replace it and being without my machine for a week while they do so!
MacBook Pro 15" (Model A1211, A1226, and A1260) Right Fan
MacBook Pro 15" Replacement Battery