Brakes

Asked by Jcripps Dec 15, 2018 at 11:40 AM about the 2000 Pontiac Sunfire SE Coupe

Question type: Maintenance & Repair

I blew a brake line and after changing the line we
bled the brakes but the pedal was still soft and
going straight to the floor and we ended up
changing the master cylinder and that didn't help
either what is my next step the only thing I can
think of is the black part that all the lines go into if
someone could give me some advice that would
be great

1 Answer
103,215

KenF answered 5 years ago

When you replace a brake line you have to really make sure to bleed out all the air. When you replaced the MC you also have to bench bleed it first, before installing it in the car. It should have come with a kit for bench bleeding. If it wasn't bench bled it can still have trapped air in it, and it is exceedingly difficult to bleed after it's on the car due to the angle it's mounted at. You also want to avoid bleeding air into the hydraulic control unit/ABS if possible. I'm not sure what you mean by "black part of the line", if it's the brake hose you are referring to, it would bleed same as the steel brake line. If your 2000 Sunfire still has rear drum brakes check the wheel cylinder too.

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