Brake Fluid Change???

[KimmoKekki]

Why you should not hit brake pedal to the floor ??

[CoryM]

Originally Posted by KimmoKekki

Why you should not hit brake pedal to the floor ??

Because the master cylinder piston only moves around 1/2 stroke in normal use. The bore wears, which leave a ridge at the end of it's normal stroke. So when you bleed and go all the way to the floor, the rubber piston seal has to go over that ridge and it tears. Then you have to replace the master cylinder.

Never go more than 1/2way to the floor when bleeding (unless master cylinder has just been replaced).