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Help please, Brake problems, Master cylinder?

 
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Old 10-28-2008, 12:52 AM
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Help please, Brake problems, Master cylinder?

Hey everyone,
So I had the scariest experience this last saturday in the canyons. I was driving a rather windy steep road and my brakes decided to take a Sh!t on me.
I was engine breaking mostly and just gently resting my foot on the pedal when all of a sudden it went straight to the floor. !!!!! O_O !!!!! twas scary. I pumped the brakes a few times and they worked again for a few seconds and then depressed all the way to the floor.
I thought maybe they overheated from canyons, but was same the next day. I can pump em up and they will slowly "leak" pressure till they are on the floor.

Not my break pads or rotors, they are fine.
No leakage from anywhere in the car, I asked my neighbor whos good with cars and he said the brake fluid was fine.

Also, can anyone give me an estimate on a Master cylinder fix if that IS the problem? A mechanic I called here is quoting 150 for the parts and 90 for labor... not ready to pay that much if I dont have to...

Any help would be great,
Thanks!
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Old 10-28-2008, 01:12 AM
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Re: Help please, Brake problems, Master cylinder?

yea it is a scary experience. makes your heart stop for a coupla seconds

sounds like either a leak somewhere causing air to get in the lines, or the MC.

first thing you should do is bleed all the brakes PROPERLY in case their is air in the lines, which it sounds like is prolly the problem.
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Old 10-28-2008, 01:19 AM
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Re: Help please, Brake problems, Master cylinder?

ya try it on a 70's doge trunk talk about pissing ur pants. Seem like the MC is out but try to bleed them like neck said might save u a lil money.

as far as price goes i did a quick look up on oreillyauto.com this is what i got
http://www.oreillyauto.com/EW3/Displ...ycleCount=2006
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Old 10-28-2008, 01:37 AM
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Re: Help please, Brake problems, Master cylinder?

fyi.... Exact same symptoms when my master cylinder went out on my 92 prelude
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Old 10-28-2008, 12:48 PM
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Re: Help please, Brake problems, Master cylinder?

My brakes were doing the same sh*t awhile ago. Had my lines bled and replaced. Got slightly better for a bit but still not completely fixed, I'm guessing the master cylinder is slowly going out on mine. So I'd look towards MC on yours too. My .02
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Old 10-28-2008, 01:13 PM
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Re: Help please, Brake problems, Master cylinder?

replace the master cyl, you are gonna need a lot of brake fluid. Its better to be safe than sorry.
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Old 10-28-2008, 02:59 PM
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Re: Help please, Brake problems, Master cylinder?

It is the cheapest at advance auto parts with the core. It is not that hard to replace (Total of 4 bolts). Bench bleeding was the hardest part.
If you do replace it your self, make sure you have a line wrench, so you don't strip the bolts.

Remanufactured is $39.99 With $35.00 core for a Si. Most of the time you can pick this up in store.
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Last edited by Dwend; 10-28-2008 at 03:05 PM.
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Old 10-28-2008, 07:24 PM
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Re: Help please, Brake problems, Master cylinder?

Thanks for the replies,
can someone tell me how to check if its just my lines leaking and not the MC itself?
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Old 10-28-2008, 07:38 PM
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Re: Help please, Brake problems, Master cylinder?

The seals in the MC went bad. Just replace, and bleed.
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Old 10-28-2008, 10:13 PM
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Re: Help please, Brake problems, Master cylinder?

if your lines were leaking, you'd notice a drop in the fluid level. but no doubt, if it is for certain the MC, go with the rebuilt one. you pay half the price and often times you get a core charge too. so it makes it even cheeper. and they are just as good as brand new ones. its really a quick job. 90 bucks sounds about right for labor if you don't want to do it yourself. but i recommend doing it yourself. its easy, and it gives you a sense of self accomplishment. it just feel so great working on your own car.
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Old 10-28-2008, 10:21 PM
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Re: Help please, Brake problems, Master cylinder?

maybe if your not to mechanically inclined, buy the refurbished part, pay the shop 90 for labor, and then bring your old one back for a core charge. Deff sounds like the MC though. good luck
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