brake master cylinder leak

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NOVAhoe

NOVAhoe

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well i noticed a few days ago that one of the seals on my master cylinder into the brake fluid resorvior is leaking, i dont know how the hell that happens but it did, it doesnt even look old or worn out, but anyways i was just wondering if they make seal kits for that, cause i dont need to buy a new master cylinder, they arent expensive but whats the point, and also how hard is it, i know ill have to rebleed the brakes but thats no biggie, does the resorvior just pop out and you can pull the old seals out and push in new ones?

---------- Post added at 12:36 AM ---------- Previous post was at 12:26 AM ----------

hmmm well i did a little research and it looks like it might just be easier to replace the whole master cylinder as opposed to rebuilding it, at least the new one just bolts right on and all i gotta do is bleed it, plus it gives me an excuse to put fresh brake fluid in and bleed the whole system
 
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sparg93

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make sure you get the acdelco master cylinder...i've heard a lot of stories of Cardone leaking.
 
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NOVAhoe

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yeah the acdelco one from autozone is like 50 bucks, so why not, isnt acdelco like the gm oem parts anyways?

---------- Post added at 01:18 AM ---------- Previous post was at 01:13 AM ----------

is fenco any good? they have the most expensive one at auto zone, ive never heard of them though
 
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NOVAhoe

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yeah i found a link you posted to the same acdelco one in another thread to amazon, that will be the one i buy, thanks man
 
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NOVAhoe

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that might be easier, does the reservoir just pop off the master cylinder?
 
SunlitComet

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yes. that number is supposed to be the reservoir and grommets. remember to bleed the cylinder before hooking of the lines and bleeding the brakes. And remember also that brake fluid destroys paint.


  1. Lubricate new reservoir grommets with silicone brake lube, then press grommets into master cylinder body. Ensure grommets are properly seated.
  2. Lay reservoir upside down on flat, hard surface. Press master cylinder body onto reservoir using rocking motion.
 
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NOVAhoe

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sweeeeet, thanks, i think ill do that, its cheaper that way, and if all else fails ill just buy a whole new master cylinder, at least its a relatively cheap and easy fix all around
 
blue99tahoe24

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i ran in to the same problem today i had to put in brake fluid like 3 time and i just bought the master from autozone a while ago with lifetime warranty and today i went to check on it and the guy asked what kind of brake system i had and they didnt ask that before and he said i mite have the wrong one u guys think thats true? and what kind of brake systems do hoes have?
 
SunlitComet

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Not a great one. But definitely room for available improvement. That sounds fishy to me But he could be ASSUMING that he thinks you you have a hydra boost setup. We Stock a 4-wheel brake system with disc in front, drums in back 10" for 2dr, 11" for 4dr with a Kesley-Hayes 4-wheel 3-sensor ABS system and a vacuum booster.
 
Gzes

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I would try it and if it doesn't work then they do returns and u can try the other one
 
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NOVAhoe

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what does the hydra boost actually consist of? and how does it work, i keep hearing about it but i dont have a clue what it is
 
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