trying to address frozen brake pedal (literally cannot push it down) found the cap to the master cylinder size to not match any of my standard sockets. What is the master cylinder lid or fill cover "trick" that I'm not aware of? looks like it'd be hard to get to under floorpan with an adjustable wrench and none of my sockets fit on it through the inspection floorpan hole. Its not rounded or anything, it looks very solid, but what size is it??? THANK YOU.
