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Old 03-04-2009, 05:19 PM
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really need help. brakes dont work!

i drive an 81 camaro sb 350. so the other day i was driving and noticed my brakes werent working properly. i could pump them and that seemed to help but the pedal just goed to the floor otherwise. i replaced the master cylinder and it still doesnt work. i even got a second master cylinder because i maybe that one could be bad and the new one doesnt work either. so i rele need help i need my car to get to work. thank you for your help

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Old 03-04-2009, 05:32 PM
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Have you checked everywhere for leaks? Is it loosing fluid?
How did you bleed the breaks?
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Old 03-04-2009, 05:46 PM
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If you have rear drums a small leak in a wheel cylinder with do that.. Makes a huge differents in pedal feel and will pump up too.
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Old 03-04-2009, 05:50 PM
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where would i check for leaks? i dont think its loosing much fluid atleast it doesnt seem so. i bled the cylinder before installing and after. how else do you bleed brakes?
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Old 03-04-2009, 05:51 PM
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where is the wheel cylinder? how do i fix that or check that?
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Old 03-04-2009, 06:00 PM
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Pull the rear wheels off and then the brake drums. The cylinder is at the top, it is what the brake line is attached to. If there is any wetness near the ends of the rubber dust caps, they are leaking.

I have a couple questions
1 after you pump the pedal and you get brakes, if you stay on the pedal does it go back to the floor or does it stay high until you release it?

2 What was the original issue?

3 have you tried adjusting the rears ?

If you have never done it before, replacing those wheel cylinders can turn into a nightmare, the lines tend to break on a vehicle that old and a simple job can get real nasty real quick.

The other thing is these are your brakes, if you are not 100% sure what you are doing, take it to someone who does before you kill yourself or someone else.
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Old 03-04-2009, 06:14 PM
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well originally when i pumped them id get a pedal and itd go down but now it gets harder but still goes down alot and then goes all the way.

i was driving and they got worse and worse. luckily its a stick so i down shifted

how do i adjust the rears? would that cause this problem?

how can the rear brakes affect the front?

my neighbor is very expierienced with cars so hes helping me. he thought it was the master cylinder but when that didnt work he mentioned something about the rear. the reason im asking on hear tho is because 2 heads are better than one and hes busy alot so all your help is greatly appreciated
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Old 03-04-2009, 06:32 PM
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Jack up the rear, pull your wheel off and then pull the brake drum off. check both sides for wetness. My money is on a leaking wheel cylinder.

The brake fluid will go to the path of least Resistance. aka the leak.
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Old 03-04-2009, 06:37 PM
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so this would cause my front brakes not to work?
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Old 03-04-2009, 06:39 PM
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It will make it feel that way. Feels a lot like a bad master cylinder.
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Old 03-04-2009, 07:27 PM
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well the car liek doesnt really stop so they go down but also dont work. and yea thats what my neighbor thought but i replaced it and when the new one didnt work i replaced that one and still it doesn't work
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Old 03-04-2009, 08:04 PM
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Quote:
Originally Posted by weirdbeard
Jack up the rear, pull your wheel off and then pull the brake drum off. check both sides for wetness. My money is on a leaking wheel cylinder.

The brake fluid will go to the path of least Resistance. aka the leak.
I would be checking the wheel cylinders seen it so many times. cole
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Old 03-04-2009, 08:33 PM
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I has to be either air in the lines or you have a leak some place . Are you sure you have all the air out ? Also how old is the brake fluid ? You might consider about changing it . It does go bad . Have someone do the brakes while you start checking all the lines , the rear wheel cylinders and the front calipers . If you can't see anything then put the car on jack stands and pull all the wheel and inspect everthing real well . Clean everthing while you have it all torn apart with brake cleen . Make sure your rear brakes are adjusted . That is what I would do !
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Old 03-05-2009, 11:48 AM
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You have a leak. If you can pump the pedal up and then it slowly goes back down there is a leak somewhere. Is the fluid level in the master cylinder going down. Once you fill it it should stay filled unless it is leaking.
I also would vote for a wheel cylinder. Look at the backs of the rear tires for fluid or a mud like buildup?

If it is a wheel cylinder, change both sides.
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Old 03-05-2009, 12:29 PM
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thank you all for your help. im gonna try these things tonight hopefully
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