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The Fluid keep transfering from the Master Cylinder to the ABS Modulator

Tiny
ROMEOOG
  • MEMBER
  • 1993 HONDA ACCORD
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,900 MILES
I have an 93 Honda Accord Ex, it has ABS. Since I bought it it has many leaking problems I have fix them all accept for the problem on the brakes system. The Fluid keep transfering from the Master Cylinder to the ABS Modulator, I have change the master cylinder out and even change out the Modulator thinking that would solve my problem but it still doing it. Now i'm stuck not sure what's the problem I guess the only thing left is the pump accumulator that I haven't touch. There is no code no lights whatsoever on the car. Can anybody help or ever run into this problem? I have been searching the net for days and haven't found the answer.
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Sunday, May 16th, 2010 AT 10:03 AM

7 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi RomeoOG,

The modulator is bad and leaking internally. If you had replaced with used parts, it would not be surprising that it reoccurred.
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Friday, April 9th, 2021 AT 1:15 PM
Tiny
ROMEOOG
  • MEMBER
  • 22 POSTS
Thank you for the answer, You know there is 2 little hole that when I press on the brake before I saw fluid coming out on the hole in the front if that means anything the hole in the back doesn't leak fluid.

So is that mean the Modulator is bad?
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Friday, April 9th, 2021 AT 1:15 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
The 2 holes should be sealed with rubber caps. If any is missing, internal leakages has occurred causing the stopper to be expelled.

It means the modulator is bad.
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Friday, April 9th, 2021 AT 1:15 PM
Tiny
ROMEOOG
  • MEMBER
  • 22 POSTS
The 2 rubber seal is missing when I got it. What I did was put something on it and seal it with JB Qwik and it still doing the same thing before which is transfering fluid from the master Cylinder.

So I gues buy another one?
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Friday, April 9th, 2021 AT 1:15 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You got a bad modulator and should get the seller to replace it for you.
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Friday, April 9th, 2021 AT 1:15 PM
Tiny
ROMEOOG
  • MEMBER
  • 22 POSTS
I bought it from a Junk Yard so I don't think they can help much.

Anyways I just place an order on Ebay it comes with a complete pump accumulator & also the modulator, but I notice that there's no rubber seal.

Do I need to seal it before install it? Does it matter if it has a seal or not?
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Friday, April 9th, 2021 AT 1:15 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
If it is a used unit, no rubber seals means that the accumulator is bad.

Do not install, get a replacement part first.

The junk yard should exchange the part for you.
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Friday, April 9th, 2021 AT 1:15 PM

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