brake fluid leak
Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,453
Likes: 347
From: SC
brake fluid leak
I have brake fluid leaking slightly from where the master cylinder fastens to the booster. Bolts are tight. Is there a gasket there? Can't seem to see it in the FSM. Any ideas
Thanks
Thanks
Intermediate
Joined: Sep 2008
Posts: 40
Likes: 0
Yes
There are several seals in the bore/piston of the MC
No criticism intended but not flushing brake fluid can accumulate trash( dark fluid) and create wear.
Some times fluid leaks back into booster which is doubly bad
There are several seals in the bore/piston of the MC
No criticism intended but not flushing brake fluid can accumulate trash( dark fluid) and create wear.
Some times fluid leaks back into booster which is doubly bad
Last edited by covertte; Jan 22, 2009 at 06:55 PM.
Corvette Enthusiast
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From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
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Thread Starter
Melting Slicks
Joined: Mar 2008
Posts: 2,453
Likes: 347
From: SC
OK, I found the info on bleeding the brakes. Think I can handle this, although I am fairly new at this. Also it says to flush the system when new parts are installed. How would I do that, and after new cylider is installed do I just fill it and how much? I assume I would then need to bleed the system. Thanks for the patience.
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Le Mans Master
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From: Ft. Lauderdale Fl
Le Mans Master
Joined: Jul 2007
Posts: 5,043
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From: Tampa Florida
Make sure that enter your specific year model on their website incase your year model requires a different part #
This website sells the rebuild kit but it seems kinda pricey:
http://shop.advanceautoparts.com/Pro...tNumber=MK1856
Pro
Joined: Mar 2008
Posts: 552
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From: Dubuque Iowa
OK, I found the info on bleeding the brakes. Think I can handle this, although I am fairly new at this. Also it says to flush the system when new parts are installed. How would I do that, and after new cylider is installed do I just fill it and how much? I assume I would then need to bleed the system. Thanks for the patience.
Just make sure as you bleed the brakes that your fluid level in the master cylinder doesn't go all the way down. Continually fill it up.
To bench bleed a new master cylinder, clamp it to a vise. The fill it with fluid and use a screw driver or something to push in the piston about 1/4 of an inch repeatadly until no bubbles come back out into the reservoir. The new master cylinder should come with plastic screws to block off the line ports for bench bleeding.
It's not as hard as it sounds, Good Luck
Racer
Joined: Jul 2008
Posts: 317
Likes: 1
I bought a $30 mite vac manual hand pump with a reservoir, it made bleeding brakes on my truck easy as pie, best $30 tool I have ever bought.
Stick one end on the bleeder, pump up a vacuum, tighten bleeder when the fluid runs clear. Make sure you fill the master or have someone watching it, you don't want to run it dry, the lines don't hold a lot of fluid.
Stick one end on the bleeder, pump up a vacuum, tighten bleeder when the fluid runs clear. Make sure you fill the master or have someone watching it, you don't want to run it dry, the lines don't hold a lot of fluid.
Instructor
Joined: Jul 2007
Posts: 132
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From: Austin Texas
You can get a new AC-Delco from "thepartsladi" for a good price:
http://cgi.ebay.com/ebaymotors/86-87...6504QQtcZphoto
As others have said, it is not a hard job, just takes time and patience.
Big HINT: After bench bleeding, before you secure the MC to the booster, hand thread the 2 nuts from the front/rear pressure lines first. You do not want to accidently cross thread these.
http://cgi.ebay.com/ebaymotors/86-87...6504QQtcZphoto
As others have said, it is not a hard job, just takes time and patience.
Big HINT: After bench bleeding, before you secure the MC to the booster, hand thread the 2 nuts from the front/rear pressure lines first. You do not want to accidently cross thread these.
Instructor
Joined: Jul 2007
Posts: 132
Likes: 0
From: Austin Texas
Here is a writeup my dad did when he replaced MC on his '93 :
http://forums.corvetteforum.com/c4-t...-finished.html
http://forums.corvetteforum.com/c4-t...-finished.html
Instructor
Joined: Jul 2007
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From: Austin Texas
Racer
Joined: Aug 2007
Posts: 260
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From: Pensacola Florida
I just noticed mine last night and doing the same thing. Is there a way to clean the inside of the booster? Take it off??
Le Mans Master
Joined: Jul 2007
Posts: 5,043
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From: Tampa Florida
