After replacing and bleeding the brakes there is no pressure?

Tiny
SFINA
  • MEMBER
  • 2014 DODGE RAM
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 105,000 MILES
Brake change. No pressure after bleeding, replaced front calipers, service electronic brake system lit up during the change z no leaks.

I changed the brakes on my truck. In the process I had to replace both front calipers due to stripped pressure release valves.

I don't have a lift so I bled the front brakes while on the jack stand and couldn't get them to stiffen up.

I moved to the rear and bled both brakes and still no pressure. No air bubbles either.

Bled them until I saw the new clean fluid come through.

Then the "service electronic brake notification lit up on the dash)

Any ideas?

P.S. There are no leaks in the brake lines or by the master cylinder. Reservoir stays full.

Brakes weren't end of life but would need done probably by winter so I went ahead and took care of it while I was off work.
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Monday, April 5th, 2021 AT 8:06 PM

3 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good morning,

This sounds like the master cylinder has failed internally. The seals internally are not allowing pressure build-up. This comes from pumping the pedal after you replace the pads. The brake pedal goes down to the floor a couple of times and if the fluid was dirty, it can damage the seals.

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

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

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

Roy
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Tuesday, April 6th, 2021 AT 4:38 AM
Tiny
SFINA
  • MEMBER
  • 2014 DODGE RAM
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 105,000 MILES
Brake change. No pressure after bleeding

I changed the brakes on my truck. In the process I had to replace both front calipers due to stripped pressure release valves.

I don't have a lift so I bled the front brakes while on the jack stand and couldn't get them to stiffen up.

I moved to the rear and bled both brakes and still no pressure. No air bubbles either.

Bled them until I saw the new clean fluid come through.

Then the "service electronic brake notification lit up on the dash.

Any ideas?

P.S. There are no leaks in the brake lines or by the master cylinder. Reservoir stays full.

Brakes weren't end of life but would need done probably by winter so I went ahead and took care of it while I was off work.
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Tuesday, April 6th, 2021 AT 10:35 AM (Merged)
Tiny
STEVE W.
  • EXPERT
Those can be a bear to bleed. You actually need to bleed them 3 times total. You first bleed them in this order (1) Right rear (2) Left rear (3) Right front (4) Left front. Then you need to connect a scan tool and run the ABS system bleed to remove any air that got into the ABS unit. Then finally you do another manual bleed like the first one to get any air that may have come out during the scan tool procedure as you don't open the system for that it simply cycles the solenoids in the unit. Air in the system can set the light you have on as it detects the lack of system pressure. Once you have completed that you should have a solid pedal again.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system
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Tuesday, April 6th, 2021 AT 10:35 AM (Merged)

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