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Brake pedal go to the floor? I have replaced a caliper, Master cylinder and hose and still nothing

Tiny
KICK N OUGHT
  • MEMBER
  • 1999 TOYOTA AVALON
  • 3 CYL
  • 286,765 MILES
I have replaced a caliper, master cylinder, and hose and still nothing has changed, it has only gotten worse. Someone tried to give me front brakes only but nothing. Someone recommend I change my booster, will that fix it? Thank you.
Thursday, June 29th, 2017 AT 8:35 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

After replacing those components have your bleed the brakes.
Any time a caliper, master cylinder or hose gets replaced; air will get trapped inside the brake system. Unless the air gets purged out it will stay in the system. And since air compresses it will make the brake pedal go to the floor without actually applying the brakes.

Here is a helpful guide to brake bleeding:

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

I have attached the brake bleeding procedure below.

Please let me know of any questions.
Thank you.
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Saturday, October 9th, 2021 AT 7:16 PM

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