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Location: Jacksonville IL
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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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Old 04-07-2005, 03:24 PM
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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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'84 944 moneysucker edition (SFR, Corbeaus, etc.)
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Old 04-07-2005, 05:13 PM
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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
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Old 04-07-2005, 07:08 PM
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Two years, maximum IMHO.

nate
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1988 944... and a bunch of other cars
Old 04-09-2005, 03:16 AM
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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
1974 Vespa Rally 200, 1974 Vespa Primavera 125, 1963 Solex 2200, 1938 Buick Special, 2008 Mini Cooper S, 2010 Mazda CX-9, 1986 VW Vanagon Syncro Westfalia, 1989 VW Doka Tristar - in the stable
1989 Porsche 944, 1973 VW Beetle - gone but not forgotten
Old 04-09-2005, 08:26 AM
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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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Old 04-09-2005, 01:20 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)
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RX-7 built of other RX's (and a good place to throw money) (sold)
z31 300zx vg30det+ (new money sucker)
Old 04-09-2005, 09:09 PM
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