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Author Topic:   bleeding brakes
bryanb30
Dirt Freak

Total posts: 243
posted February 17, 2003 07:10 PM  
im having trouble bleeding the brakes on my camaro... it has a wilwood 7/8 master cylinder and 4 wheel disk brakes ..when we try to bleed them we get a pretty good pedal and then the pedal goes to the floor..is the master cylinder too small or do i need some kind of proportioning valve or what? please help me play day is march 1st!!!!!

Flatlander
Dirt Freak

Total posts: 355
posted February 17, 2003 11:03 PM  
If you're building up a good pedal and it goes awayI would look for a leaksomewhere it takes a lot of patience sometimes to get all the air out but thats part of the fun you fight scracth and claw then all of a sudden something works just like you want it too perserverance

bryanb30
Dirt Freak

Total posts: 243
posted February 18, 2003 07:45 PM  
so is the one wilwood master cylinder enough for 4 wheel disk brakes? i dont think i have a leak but this weekend i will check it all again....also i have done away with the stock metering block or valve or whatever the thing is called.. was this a mistake? if i keep having trouble with this im gonna put a stock master cylinder on it and try that..

dman60
Dirt Full Roller

Total posts: 65
posted February 18, 2003 10:52 PM  
Did anybody bench bleed the master cylinder?
Also, check for leaks where the lines come off the master cylinder. This area is notorious for leaking air, no fluid, just air. I messed around with this situation for weeks before I found it. The fitting that goes from the master cylinder to the brake line fitting was bent. It sucked air, but didn't cause fluid to leak out.
Hope this helps.
Stan

Flatlander
Dirt Freak

Total posts: 355
posted February 18, 2003 11:52 PM  
I would think the master cyl is fine Dman Makes a good point about the lines and bench bleeding it seems like a leak or loose line does the pedal hold up as long as you hold it or does it build up and immeidiatly leak down while pressure is being applied

outlawstock17
Dirt Forum Champ
Total posts: 1363
posted February 19, 2003 07:58 AM  
can you pump the brakes and get a firm pedal after it has gone soft? if the master cylinder is lower than the calipers, you may need a 2 lb. residual pressure valve.

bryanb30
Dirt Freak

Total posts: 243
posted February 20, 2003 06:56 PM  
no i didnt bench bleed it...ok here goes.. it will pump up to a good pedal and then when you get your last "pump" on the pedal and hold it...it goes to the floor ...also if you leave it for a little while and just hit the brakes, there is no pedal at all
I will take the thing off and bench bleed it, check everthing and let you guys know how it goes.. but im pretty sure i dont have a fluid leak cause ive looked, but i could have had grease in my eye or something!!

bryanb30
Dirt Freak

Total posts: 243
posted February 23, 2003 08:26 AM  
i guess the problem was is the rf brake, i was wanting to learn how to drive on 4 wheel brakes but i dont have time to fix it so i unhooked the rf and i have good brakes now.....almost everyone runs 3 wheel brakes here anyway so for now the heck with the rf!!

jnewman44
Dirt Forum Racer

Total posts: 83
posted February 23, 2003 10:10 AM  
I use one man bleeding,start at RR as usual,take a piece of small clear nylon tubing and press it on the brake bleeding nipple(by hand),put the other end of the hose in a bottle half full of new brake fluid(the end of hose must be in fluid), open the bleeder,now slowly pump the pedal until no more air bubbles come out ,then close the bleeder before removing the hose from the bottle.

Pickel
Dirt Forum Champ
Total posts: 784
posted February 25, 2003 08:15 AM  
thanks everone who replied... i have a great pedal when i just hook the LF and the rear brakes up ...the way i have it setup is, i have a 90 degree elbow style fitting ******* into the master and the LF and rear brake lines ***** into that.... to get the rf brake line hooked up i used 2 90 degree fittings and that is when i have the problem, no pedal...but again when i have just one fitting and just the LF and rear brakes hooked up i get a very good pedal... I AM A ROOKIE SO SHOULD I LEARN HOW TO DRIVE THIS CAR ON 3 WHEEL BRAKES!!!

Pickel
Dirt Forum Champ
Total posts: 784
posted February 26, 2003 09:01 AM  
bryanb30, just a little something to keep in mind. You WANT (at least it's been so in my experience) 4 brakes for when the track goes dry slick.

So you might want to double check your plumbing so as to fix your brakes.

Curious, the line going from the master to the RF, what line did you run: solid (what size), braided steel, plastic?

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bryanb30
Dirt Freak

Total posts: 243
posted February 26, 2003 09:24 PM  

i just used the stock line and i checked the rubber line and there is a tear in it but it wasnt leaking fluid, i will replace that line and see if it helps..thanks again everbody... THE DIRT FORUM KICKS **** !!!!

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