It was 4:30pm when I happily walked down the lawn to leave to my friends. My boyfriend says "let me do your brakes, it will take 20 minutes". I say "20 minues"? His response, "yup". Its 1:30am and he is still freaken out there. WTF. Its a 2002 ford mustang.
If the pads are worn down heavily, it can be difficult to push the brake piston back to it's new position where you can fit the new pads in... Especially on the rear brakes if the piston has to be rotated and pushed at the same time. And if there is rust, you can spend a decent amount of time lubricating or heating up bolts. However 9 hours is a lot of freakin' time to be doing brakes! Maybe you should check to make sure he's still alive.