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master cyllinder leak

for some strange reason, my master cyllinder has developed a very slow, very small leak.

The cyllinder has two pipes leading into the bottom of the container; I can see a small trail of brake fluid residue leading from where the pipe closest to the firewall meets the master cyllinder itself.

what can I do about this?

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Last edited by CJFusco; 09-18-2003 at 09:09 AM..
Old 09-18-2003, 08:02 AM
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you should fix it so it doesnt leak anymore
















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Old 09-18-2003, 08:51 AM
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Ok, when youy say container, do you mean the reservoir? or are you talking about the hard metal lines from the cylinder itself?

from the base of the reservoir: empty reservoit, remove and replace rubber grommets from master cylinder, replace reservoir. bleed brakes.

from the hard metal lines - determine if the is coming from the cylinder or the line itself.

If it is coming from the master cylinder, make sure that the line itself is tight, otherwise replace.

if it is coming from the hard metal line. Pour yourself a beer, lament your situation because you are now officially hating life. (meaning the metal lines are a big pain in the ass to replace)

AFJuvat
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Old 09-18-2003, 06:53 PM
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it is from the reservoir; glad that it doesn't seem to be a very involving process

after i cleaned up the 'trail' of fluid yesterday (i know this stuff is pretty caustic), I looked today and it hadn't leaked any more... meaning it only leaks once in awhile i guess... nevertheless I will be replacing it soon, so expect many annoying posts on the topic in coming weeks.
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Old 09-18-2003, 07:11 PM
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You probably have a small leak under pressure (only when you press the brake pedal)

Don't know if Pelican has the grommets or not they are something like $3 each.

If your reservoir is nasty now would be a good time to change it.

AFJuvat
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Old 09-18-2003, 07:19 PM
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But there's never any pressure between the reservoir and the master cylinder?
Ahmet
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Old 09-18-2003, 07:32 PM
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ahmet... since there's no pressure going from the reservoir to the m.c., then the reservoir leak probably wouldn't affect braking performance, right? it would only be the pressurized part of the system that was affected; ie if there was a master cyllinder leak, i would get air in the system and that would affect brake performance... but since the leak is in the reservoir, i probably need new brake pads? correct me if I'm wrong, please...
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Old 09-19-2003, 01:49 PM
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Yes. I think you need brake pads. Make sure the fluid reservoir is seated into the master cylinder correctly. You may just need the seals at the joint btw.

Anyway, if you don't fix it over time you will probably draw moisture into the brake fluid from the air that displaces the brake fluid as the level goes down.
Ahmet
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Old 09-19-2003, 06:26 PM
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Quote:
Originally posted by AFJuvat
..................if it is coming from the hard metal line. Pour yourself a beer, lament your situation because you are now officially hating life. (meaning the metal lines are a big pain in the ass to replace)

AFJuvat
ROFLLLLLLLLLLLLLL

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Old 09-19-2003, 08:07 PM
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"Make sure the fluid reservoir is seated into the master cylinder correctly. You may just need the seals at the joint btw. "

when i discovered the leak, i pressed the reservoir down onto the pipe, and it hasn't leaked at all since then. I will get the new seals soon, and the pads ASAP.

Thanks for your help.

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Current Stable: Black 07 Porsche 987 Cayman S: Long-Tube Headers; FabSpeed Exhaust; VividRacing ECU Tune; IPD Plenum; 997GT3 Throttle Body. Blue 1983 Porsche 928S. 1985.5 Porsche 944 Rat Rod. 2011 Acura MDX. 2008 Mazda 3. Gone But Not Forgotten:Garnet Red 86 Porsche 951("The Purple Pig"). Alpine White 83 Porsche 944 ("Alpine Wolf"). Guards Red 84 Porsche 944.
Old 09-19-2003, 10:17 PM
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