After replacing Master cylinder the brake pedal goes to the floor after starting the engine

Tiny
ELIZABETH DAVIS FREAR
  • MEMBER
  • 2008 CHEVROLET SILVERADO
  • 4.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 168,000 MILES
Replaced master cylinder. Bled them getting only fluid. Have pressure in pedal until starting engine then pedal goes all the way to floor.
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Tuesday, September 24th, 2019 AT 3:21 PM

1 Reply

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

This could be a problem with the Brake Master Cylinder to Vacuum Booster seal not seating properly or damaged. Can you inspect this seal and make sure that it is properly seated with no damage to it and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Wednesday, September 25th, 2019 AT 3:00 AM

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