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brake pressure problems
my late 85 944 isnt building any brake pressure, ive got fluid and no leaks but i have no pressure unless i pump them about 10 times
how do i check/fix this, im not really expearianced in the line of brake systems if you cant tell
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95 - BMW 740i (daily driver) 02 - kawasaki mean streak (nice weather driver) RX-7 built of other RX's (and a good place to throw money) (sold) z31 300zx vg30det+ (new money sucker) |
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04-07-2005, 04:24 PM
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Join Date: Oct 2004
Location: Memphis
Posts: 340
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I'd say it's the brake cylinder. It's right on the brake booster under the resovoir. It's an easy swap and should fix the problem. It'll cost you less than $100 and about an hour of time using tools you should have.
1. drain cylinder and remove all hoses going to it 2. remove 2 or 3 bolts holding it and the resovoir to the Master Cylinder. 3. put in new cylinder 4. hook up "bleeding hoses" and bleed cylinder (to do this I recommend mounting it to the Booster and pumping the brake pedal - much easier 5. install hoses on new cylinder and replace fluid.
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Ryan '84 944 moneysucker edition (SFR, Corbeaus, etc.) '02 Jetta TDI 280Lb/Ft 145Hp @ wheels. RC2 PP357's |
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04-07-2005, 06:13 PM
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Join Date: Dec 2001
Location: Cordova, TN
Posts: 1,222
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A good time to remind everyone to change your brake fluid every three years or so. Brake fluid absorbs water and eventually the moisture will cause rust.
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Roger Hall 81 924 N/A Some people are like Slinkies. Not really good for anything, but you still can't help but smile when you see one tumble down the stairs. |
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04-07-2005, 08:08 PM
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Join Date: Jan 2004
Location: Falls Church, VA
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Two years, maximum IMHO.
nate
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1988 944... and a bunch of other cars 
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04-09-2005, 04:16 AM
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Feelin' Solexy
Join Date: Oct 2003
Location: WA
Posts: 3,802
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I don't know guys, being able to "pump up" the brakes sounds a lot like air in the lines to me. Did you do a thorough bleed after your last brake work?
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Grant In the stable: 1938 Buick Special model 41, 1963 Solex 2200, 1973 Vespa Primavera 125, 1974 Vespa Rally 200, 1986 VW Vanagon Syncro Westfalia, 1989 VW Doka Tristar, 2011 Pursuit 315 OS, 2022 Tesla Y Gone but not forgotten: 1973 VW Beetle, 1989 Porsche 944, 2008 R56 Mini Cooper S |
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04-09-2005, 09:26 AM
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Join Date: Jan 2004
Location: Falls Church, VA
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IMHO on an old car with questionable history, if the pedal has ever gone to the floor the MC is toast, if it isn't now it will be. the seals ride over a corroded portion of the bore and get all kinds of torn up.
nate
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1988 944... and a bunch of other cars
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04-09-2005, 02:20 PM
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i as well thought it was the lines, i bled thesystem multiple times just to be sure
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95 - BMW 740i (daily driver) 02 - kawasaki mean streak (nice weather driver) RX-7 built of other RX's (and a good place to throw money) (sold) z31 300zx vg30det+ (new money sucker) |
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04-09-2005, 10:09 PM
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1985.5 Porsche 944 2.5NA
