Will all the brake fluid leak out if one of the chambers is leaking?

2019 HYUNDAI ENTOURAGE
50,000 MILES • 1.0L • 4 CYL • 2WD • AUTOMATIC
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DAVE213
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if a dual circuit system had a leak on one of its circuits, does the brake fluid all leak out after repeated pumping?
Jan 11, 2021 at 7:55 PM
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ASEMASTER6371
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Good evening,

The answer is no. Only the chamber with the leak will drain and the other will remain at its level.

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

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

I attached the diagram of the system for you when you are looking for leaks.

Roy

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Jan 11, 2021 at 8:21 PM
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DAVE213
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But will the brakes still be firm or not? And how long can someone drive with the spare circuit?
Jan 12, 2021 at 12:07 AM
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ASEMASTER6371
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No, the pedal will be half at best and the stopping distance will be greatly increased.

I would not drive it that way at all. I would get it fixed ASAP.

Roy
Jan 12, 2021 at 3:24 AM
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DAVE213
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So no floor touching.
I think it gives the same symptoms of failing master cylinder if i am not wrong.
Well, how far can you go if one of the circuit is broken?
Jan 12, 2021 at 3:26 AM
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ASEMASTER6371
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Again, I would not drive it with the pedal that low. It is an extreme safety hazard and needs to be repaired.

I would not drive more than the distance to a repair shop.

Roy
Jan 12, 2021 at 3:38 AM
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DAVE213
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Yes, i know usually in single circuit system ince the fluid is over the brakes stop working.
Does it take the same time for the dual system to stop working or take longer?
Jan 12, 2021 at 3:42 AM
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ASEMASTER6371
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When you have only one portion working, the pedal reaction time and distance for stopping are greatly increased as I stated before.

Roy
Jan 12, 2021 at 3:49 AM
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DAVE213
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Thanks Roy.
Jan 12, 2021 at 3:54 AM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Jan 12, 2021 at 4:00 AM