15 - 30 Minuten
The left fan was quite noisy, I did use the iFixit guide to access the fans and clean/oil them, but the noise came back, so I decided to change both of them.
Thanks to the iFixit guides, it went smoothly, I took the opportunity to change the internal drive. It took about one hour. No problem at all.
In this specific instance, the guide was quite all right. My only problem is that I printed it to put the screws on the pictures. Ialmost forgot to dust the disassembled Mac away from them...
MacBook Pro 15" (Model A1211, A1226, and A1260) Left Fan
MacBook Pro 15" (Model A1211, A1226, and A1260) Right Fan