After replacing the brake lines, brake booster and Master cylinder, the brakes do work and the pedal goes to the floor?

Tiny
PATTERSONWINDY
  • MEMBER
  • 2006 KIA OPTIMA
  • 4 CYL
  • AUTOMATIC
  • 199,000 MILES
I have replaced all brake lines. I have replaced brake booster and master cylinder and brake pedal still sinks to floor with no brakes. Help
Monday, February 20th, 2023 AT 6:24 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,840 POSTS
Hello,

Did you bench bleed the brake master before installing it? If not, this needs to be done. Please check out the video below.

https://youtu.be/WDxvEQrMkBg

This guide can help as well:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

If the brake master was bled, then you have air stuck in the ABS unit so the valves inside the unit will need to be held open while you bleed the system. Please check out this video to show you how:

https://youtu.be/nQRnKyVyMuQ

Please let me know how it goes.

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Monday, February 20th, 2023 AT 12:24 PM

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