It keeps making sounds I don't know from the fan and it keeps crashing

You haven't given much detail but it sounds like the fan is covered in dust or is damaged.

This guide is for the battery but it shows you how to take the bottom cover off.

Taking off Bottom Cover

Once the cover is off take a look at the fan. Is it covered with dust? If yes blow off and gently clean off the fan blades. It might be a good idea to turn the system on its side with the top open to a 90 degree angle so it is stable. Press the power button and see if the fan is spinning properly. If not then replace the fan. If yes then test it to see if the overheating problem is gone.