What should I be aware of when opening a Lenovo X201 to look at the fan?

Question

My Lenovo X201's fan has been making a lot of noise on occasion recently (buzzing, sawing even); also, I've been getting shut-downs due to max temperature reached, although not at the same time as the noisy fan.

So, I was thinking of trying to open it up and having a look - at the fan at least - as suggested in answers on noisy fan questions.

Now, I want to be super-careful here, so:

• Do I need any special tools/implements other than the appropriate-size screwdriver?
• Is there any glue in there which I will need to undo?
• Anything special to watch out for?

I'm also not sure how to clean the fan or to determine whether the fan noise is related to the power-downs, but I guess that should go on a different question, unless there's some "pick your laptop apart guide" which covers all that.

Notes:

• A while ago I upgraded my Laptop memory to 2 x 4GB instead of 1 x 2GB; it used to be much slower before but didn't have power-outs.

Answer 1

Based on @Tetsujin's suggestion, this seems to cover the basics:

https://www.youtube.com/watch?v=IJZZSD8x9_8

It's a step-by-step video of disassembling the X201 and examining the fan.