The left fan of my girlfriend's Macbook Pro 15" A1226 started making a loud rattling/grindi
The repair went very smoothly. Took about 30 mins from start to finish.
I followed iFix's guide to a T but Instead of replacing the fan I disassembled it, cleaned out any debris and applied lubrication with RadioShack's Needle-Tip Precision Lubricator to the axle. WD-40 would've worked just as well. Problem solved.