Got tackled with my mac in my backpack. Left fan was making a clicking noise. Opened her up per these instructions and noted that my left fan was scraping against its housing. Not addressed in this guide, I used a tiny Philips to take apart the housing and see if I could do something about the blades scraping. They’re plastic so can’t be bent. Regardless, I think I was able to get something moved around in there because I put everything back and was sort of surprised when my mac powered on with no clicking.

Thank you a lot for this guide.