Loudest Fan in the world...
10 - 45 Minuten
My right fan bearing was going out. It was making so much noise i was asked to leave my universities "none quite" study area.
Repair went great and was simple. MBP is now quite and cool.
While i was in it I took the Optical drive out and cleaned it. The drive works again after not working for a year and a half.
Follow the guide and there is absolutely no stress.
MacBook Pro 15" (Late 2008-Mid 2012 excluding Mid 2009 2.53 GHz) Left Fan
MacBook Pro 15" (Late 2008-Mid 2012 excluding Mid 2009 2.53 GHz) Right Fan