Left fan too much noisy

Il Mio Problema

Noisy left fan, I tried to clean it but the problem was a defect in cover of the fan (see image) determining a little oscillation of the cover and the noise.

La Mia Riparazione

I simply changed the fan. Now the Mac is noiseless!

Il Mio Consiglio

The substitution is very easy, especially using the iFixit instructions.