I have a brake problem, I had a spongy brake pedal, I bleed de system the pedal get ok, and one week later I have air in the system again, I keep bleeding every week but the air still coming in after one week of use, note, de air is always in the front wheels, can anybody give me an advice, thanks
Brakes air in the system
- Thread starter MarceloK
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GrumpyGel
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Nodge68
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Has the system been allowed to empty? If there is air in the ABS modulator, then SDD or other suitable diagnostic equipment is needed to purge the air from the system.
GrumpyGel
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Had this with my Wabco F1.
I removed the pipes to the modulator 1 at a time and used a syringe to pump fluid into it. Worked well for me.
Hi, the system didn’t allowed to empty, I change the master cylinder, I check the ABS module and is ok, I had air only in the front wheels, sometimes in the right or the left or both of them one week or so after bleeding, I must bleed once in a week to maintain the pedal up, I don’t have any leaks
Nodge68
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How can you change the MC without pushing air through the ABS modulator? It sounds like air is trapped in the modulator somewhere, which is causing loss of pressure.
There's no way that air can enter the system, if there are no leaks. So if you're getting air at the caliper, it must be coming from higher in the system, and not being fully bled out. Or you're allowing air back in through the bleed screw, before sealing it.
