spongy brakes? milky brake fluid?

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spongy brakes? milky brake fluid?

Postby rwd_mayhem » Fri Sep 05, 2008 10:06 am

iv got a BF mazda familia, not a toyota i know.
The brakes wernt working when i got it and i thought i would be able to fix it. when i got it the pedal went all the way to the floor and pulled to the left under heavy brakeing, it also made gurgling noises from the booster.
so i replaced the booster and master cylinder and bleed the brakes and its still not working right! now the pedal needs to be pumped up for it to work properly.

When i bleed the front drivers side caliper, milky brake fluid came out which is weird.

anyone know what is going on here?
current: 1975 Valiant Regel
previous: 1980 mazda 626, 4AGE AE70 sedan, AE70 sedan, mk2 escort, KP60 starlet, TE71 liftback X2
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Postby postfach » Fri Sep 05, 2008 10:14 am

Sounds like it's got a lot of moisture in it, bleed ALL the brakes like normal (furthest from mc to closest) until the fluid coming out looks new.
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Postby rwd_mayhem » Fri Sep 05, 2008 10:45 am

and what causes moisture to get into brake lines?
current: 1975 Valiant Regel
previous: 1980 mazda 626, 4AGE AE70 sedan, AE70 sedan, mk2 escort, KP60 starlet, TE71 liftback X2
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Postby RS13 » Fri Sep 05, 2008 5:59 pm

rwd_mayhem wrote:and what causes moisture to get into brake lines?


Leaks, but you gotta remember that brake fluid is hydroscopic and will suck moisture out of the air if you leave the cap off the reservoir. Is it losing fluid? Highly aerated brake fluid can appear milky.. if there are no obvious leaks and the booster and master cylinder are definitely in good condition, I would drain the whole system of all fluid and start from scratch.
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Ex: 2x AE101, 5x KP60, KP61, EP71, 3x KE70, KE72, AE70, AE82, 2x TE71, AE90, AE92, ST170, plus 11 Hondas, 12 Nissans, 6 Fords, 4 Mazdas, 3 Mitsis, an Isuzu and a Lada!

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That sounds about right to me.

Postby Capin-Neemo » Tue Sep 09, 2008 10:30 am

cheack all the lines very thoughly for any leeks and make sure the slave cylinders in the wheels are in good condition the one with milky fluid may be sucking air in from somwhere and need replacing.
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