One here is a video, skip to the middle he talks some jibberish.
[video]http://www.youtube.com/watch?v=Qztw_aUBQhI&feature=related[/video]
I would do a little google research if I was you to find out what the PS3 Blu Ray drive is model and brand. Before you buy anything of course.
http://www.newegg.com/Store/SubCategory.aspx?SubCategory=598&name=Blu-Ray-DrivesBuy from Newegg they have some pretty good deals on Blue Ray drives. I would suggest if you do open the system up check the brand name and model if there is a sticker. Find one similar on Newegg of the same brand name and google to see if it is a good replacement that works.