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ABS brakes losing brake fluid

Tiny
MARY J ACRES
  • MEMBER
  • 1992 HONDA ACCORD
  • 2.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 2,300,000 MILES
Having severe leaking from the passenger side from the ABS container keeps overflowing, and i'm having to keep putting almost a full bottle of brake fluid every 2-3 days, master cylinder keeps draining all of the brake fluid into the ABS reservoir keeps overflowing from the lid in the engine down through the front right passenger wheelbase. Then I have no brakes at all, until I fill the master cylinder full with brake fluid.
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Friday, October 16th, 2020 AT 5:09 PM

10 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More then likely the master cylinder is the issue as feeds brake fluid to the ABS unit for it to pulse the brakes when it needs too. However, when this happens do you feel any ABS activation? It would pulse the pedal and you would hear a buzzing.

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

Let's start with this and go from there. Thanks
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Friday, April 9th, 2021 AT 11:53 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,752 POSTS
Hi,

I attached a pic below and highlighted the inlet hose. There were problems years ago with them leaking at that point. Check for a cracked hose.

Next, does the fluid drop when the vehicle isn't being used? One last question. Can you upload a pic of where you see the leak so I have a better understanding of exactly what is happening?

Let me know.
Joe
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Friday, April 9th, 2021 AT 11:53 AM
Tiny
MARY J ACRES
  • MEMBER
  • 7 POSTS
Thank you for everyone's help. We figured out the problem was the seal on the ABS container lid wasn't fighting tight so it caused the system to fail. So it had no where to go. So it caused to much pressure build up, and the ABS container overflowed from the loose cap. If we should need any further assistance in the future about this car we will let you know.
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Friday, April 9th, 2021 AT 11:53 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,752 POSTS
Hi,

I'm glad you got it taken care of.

Take care or yourself.

Joe
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Friday, April 9th, 2021 AT 11:54 AM
Tiny
MARY J ACRES
  • MEMBER
  • 7 POSTS
Okay, I will check for a cracked hose. Yes, there is a puddle of brake fluid on front right passenger side, ABS reservoir keeps taking all of the brake fluid out of the master cylinder causing the ABS reservoir to overflow from the cap area down through the engine into the front right wheel well, and leaves a puddle under the car. The entire duel brake system fails, including basic braking completely stop, he has to use his E break to stop his car. Yes, I will upload pic's and a short video showing the leaks.
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Friday, April 9th, 2021 AT 11:54 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,752 POSTS
Hi,

We need to find where it's coming from. If you get a chance, upload the pics so I can see them.

Joe
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Friday, April 9th, 2021 AT 11:54 AM
Tiny
MARY J ACRES
  • MEMBER
  • 7 POSTS
It was a hole in the main brake line on front passenger side tire.
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Friday, April 9th, 2021 AT 11:54 AM
Tiny
MARY J ACRES
  • MEMBER
  • 7 POSTS
Hear is pictures of the leaks:
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Friday, April 9th, 2021 AT 11:54 AM
Tiny
MARY J ACRES
  • MEMBER
  • 7 POSTS
More pic's of the leaks, and the master cylinder, ABS module, video of the hole in the main brake line on front right passenger tire. The brake fluid leaking out is dark black. The other day it was a black slug looking stuff coming out of the ABS module when it was over flowing out of the cap, and now the main brake line has ruptured completely.
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Friday, April 9th, 2021 AT 11:54 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Great catch. Glad you found it and thanks for the update. Clearly we need to replace that line. Let us know if you need anything else. Thanks for using 2CarPros.
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Friday, April 9th, 2021 AT 11:54 AM

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