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After replacing front brakes the brake pedal goes to the floor

Tiny
FIREBRICK1
  • MEMBER
  • 2001 MERCURY MARQUIS
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 118,000 MILES
Brake pedal pumps up, let it sit a few minutes it loses pedal it goes to the floor. Just installed new calibers and rotors and pads on front, re-bled all fronts and master cylinder, always kept fluid topped off. Trouble started when trying to bleed passenger side, could not get out the air, even with a vacuum pump. Used the clear tube method from passenger side to master cylinder, still no pedal holding.
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Friday, August 9th, 2019 AT 8:58 AM

2 Replies

Tiny
FIREBRICK1
  • MEMBER
  • 2 POSTS
Sending more on brake problem. I have found what looks like fluid on booster tank where master cylinder mates up to it.
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Friday, August 9th, 2019 AT 9:45 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

The rear seal is leaking into the booster.

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

You need a master cylinder.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

When you replace it, use a pressure bleeder to bleed the system. Vacuum and 2 person is not enough bleeding to get all the air out.

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

Roy
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Friday, August 9th, 2019 AT 12:56 PM

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