Every time I turned on my MacBook Pro it sounded as though it was preparing main engine thrusters. The known problem, but seemingly ignored by the late Mr. Jobs, with MBP fans finally struck again. Having already repaired the fan and logic board under warranty last year. So it goes I guess no product is without issue even ones with trendy Apple logos.
Repair was easy. Though I had experience taking my MBP apart to replace the HD and Smart Drive. The whole process took about 20 minutes. 50 bucks for a fan doesn't compare to the 1100 you'll spend when the logic board overheats and melts in your lap.
A few tips that I have for people taking apart a MBP for the first time are as follows. Use the makeshift tray to keep track of screws. The little bastards can hit the carpet or floor and bounce for weeks. Ending up in some preschoolers Kix cerial box. But the cover to the MBP memory acts as a pretty good tray to keep track of screws. Just keep in mind how many you remove, the types there are and if possible where they go. Draw a little diagram. There is nothing worse than getting the case back on and having an extra screw...cuz you'll be taking the whole thing apart again.