Brake fluid leak?

[bail]

Brake fluid keeps on decreasing despite of no visible leak. My brake pads and drum shoes are all new. What could be the problem?
Corolla 1997 gli 1.6 here.

[sirkosero]

Brake fluid in thr brake master is leaking to the hydrovac (brake booster)

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[bail]

Brake fluid in thr brake master is leaking to the hydrovac (brake booster)

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Will this be a costly repair?

[sirkosero]

Will this be a costly repair?

Depends. If repair kit is possible, that would cost you around 1k. If not, prepare a few thousands.

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[pdspd]

Check for fluid leak on flooring under the brake pedal.Maybe the fluid leaks inside (pushod connecting the brake pedal and the brake master cylinder).

[mina_nuka]

If your exhaust fumes smell sweet and your spark plugs are glazed, it indeed is leaking brake fluid past the master cylinder to the vacuum brake booster and into the intake manifold.

[bail]

so whats the best solution for this since i cant find any leak between the brake master cylinder and booster.

should i just replace the master cylinder with a new one? replace the booster? or buy a brake repair kit?

[jvnj]

so whats the best solution for this since i cant find any leak between the brake master cylinder and booster.

should i just replace the master cylinder with a new one? replace the booster? or buy a brake repair kit?

One way of checking if it leaks through the hydrovac is to pull off the vacuum hose which connects the hydrovac to the intake manifold. If there are presence of oil or fluid, then it is precisely leaking. I would suggest you to replace the entire assembly instead of the repair kit only, as the diaphram in the hydrovac has already been soaked in fluid, which eventually will fail afterwards.

[bail]

One way of checking if it leaks through the hydrovac is to pull off the vacuum hose which connects the hydrovac to the intake manifold. If there are presence of oil or fluid, then it is precisely leaking. I would suggest you to replace the entire assembly instead of the repair kit only, as the diaphram in the hydrovac has already been soaked in fluid, which eventually will fail afterwards.

When you say entire assembly, this includes the brake master cylinder?

[Fifiro]

Up ko lang po, having same problem with my nissan cefiro. Tanong ko lang pwede ba gumamit ng ibang hydrovac+master cylinder assembly? Or may parang universal assembly? Sorry for noob question. Thanks!

[dr. d]

Up ko lang po, having same problem with my nissan cefiro. Tanong ko lang pwede ba gumamit ng ibang hydrovac+master cylinder assembly? Or may parang universal assembly? Sorry for noob question. Thanks!

i-isa lang ang prinsipyo at general design ng hydrovac. nguni at iba-iba ang mounting configurations at dimensions nila.
malamang ay hindi kakasya ang ibang tatak sa cefiro.
subukan nyo ang pinsan nilang sa sentra, at baka lang sakali...
but i doubt it.

errr... why replace it, sir?

[Fifiro]

i-isa lang ang prinsipyo at general design ng hydrovac. nguni at iba-iba ang mounting configurations at dimensions nila.
malamang ay hindi kakasya ang ibang tatak sa cefiro.
subukan nyo ang pinsan nilang sa sentra, at baka lang sakali...
but i doubt it.

errr... why replace it, sir?

sir ang sabi kasi sakin worn out na brake master ko at may singaw na rin ang hydrovac, kaso lang ngayon kasi wala kami makitang surplus para mareplace. Yung hydrovac po ba narerepair pa?

[jaypee10]

sir ang sabi kasi sakin worn out na brake master ko at may singaw na rin ang hydrovac, kaso lang ngayon kasi wala kami makitang surplus para mareplace. Yung hydrovac po ba narerepair pa?

sealed ang hydrovac diba.kaya malabong ma repair..bili nalang ng bago

[SilverHorizon]

1.3k lang sa auto supply Hydrovac ng big body...
kabibili ko lang last last week.

P.S
nabuksan na ba Drum brakes mo?
minsan walang visible leaks sa labas pero once iangat mo makikita mo tagas na pala piston ng drum.

[Fifiro]

sealed ang hydrovac diba.kaya malabong ma repair..bili nalang ng bago

may makkunan na pala ako sir, 3500 hydrovac at brake master assembly pang Cefiro talaga, mahal ba sobra? Local surplus.

Actually tolerable pa naman brakes ko nirecommend lang mechanic ko palitan brake master. Yun pala di match sa hydrovac ko. Kaya sobrang nanikip ang brakes. Nadamaged rin ata nila seals sa hydrovac kakaadjust nung pushrod to the brake master kaya papalitan ko narin. Hay.