Replacing the fan
20 - 30 minutos
The right fan was doing a big ratle and was not even able to reach higer rpm.
The repair went smoothly. My only difficulty was re-attaching the keyboard lid to the frame because the clips near the superdrive. I had to press it firmly to attach them.
Not much advice. Just be patient with the superdrive clips and dont be affraid to press it a little bit.