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Brake pedal goes to the floor could not get all of the air out of the system

Tiny
GENEO1
  • MEMBER
  • 2002 TOYOTA SIENNA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
Brake pedal started going to the floor about a week ago.

I changed the Brake Pads, rotors and master cylinder and bled the breaks. Could not get all of the air out of the system when bleeding.

Now I am having the same problem I had when this started; brakes going to the floor slowly and most if not all brakes are lost.

Now I'm suspecting the brake calipers? Whats your take.
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Monday, October 26th, 2015 AT 2:28 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Unless the calipers have a visual leak or you have installed them on the wrong side of the car, you are on the wrong track.

If you have what we call a "creeping" brake pedal and you are not losing any fluid, it can only be the master cylinder or the ABS unit doing what we call bypassing.

If you are losing fluid, then you just need to find the leak.
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Monday, October 26th, 2015 AT 4:27 PM

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