'85 Fleetwood brakes
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, '85 Fleetwood brakes in Past Cadillac Vehicle Discussion; I have waded into my brake problems again. About two years ago, I replaced all the brake parts, like rotors, ...
  1. #1
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 Fleetwood FWD
    Join Date
    Mar 2009
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    mich
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    '85 Fleetwood brakes

    I have waded into my brake problems again. About two years ago, I replaced all the brake parts, like rotors, calibers, drums & cylinders on the rear, hoses, booster, master cylinder etc.
    The brakes have sucked since day one, but I'm determined to figure out why. The vacuum pump is a POS, and vacuum with engine running = about 17 inches HG.
    So...figuring that was the problem, I bought a new electric pump from Summit Racing, made a bracket, and mounted on the front side of the left strut tower.
    It pulls a LOT of vacuum, like 30 inches, and it's plumbed just to the brake booster.

    No dice...brakes un-changed.....
    My current suspect is the master cylinder, which came from Autozone about two years ago. SO today I bought a Cardone brand to try.
    Next item will be a boat anchor maybe....

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  3. #2
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 Fleetwood FWD
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    mich
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    Re: '85 Fleetwood brakes

    Well, with a new master cylinder, and another section of brake line replaced, bled all for corners, nothing has changed much. Pedal is right up at the top. Some kind of weird ( probably simple ?) problem going on here....

  4. #3
    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Connoisseur
    Automobile(s): 98 DeVille, 97 DeVille d'Elegance
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    Feb 2012
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    Re: '85 Fleetwood brakes

    So the pedal is hard at the top and doesn't pus easily and car won't stop? or does it just suck at stopping?
    I had a car that the rear adjusters NEVER worked right even after replacing everything. Every few months I would have to adjust them manually then it would be fine again.
    If you're talking about the booster isn't assisting the braking.... that's another story.
    Are there mutliple MC's available for your year? Sometimes the auto places have the wrong listings, bore and strokes are wrong but it'll fit just fine brakes will suck though.

  5. #4
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 Fleetwood FWD
    Join Date
    Mar 2009
    Location
    mich
    Age
    82
    Posts
    727

    Re: '85 Fleetwood brakes

    I have adjusted the rear brakes, which may have brought the pedal up, but it's hard to push it seems. I'll be into it again in a day or so......
    The booster is holding negative/vacuum pressure, so it's not leaking. I have a vacuum gauge in the line, to help sort out the problems.

  6. #5
    rodnok01's Avatar
    rodnok01 is offline Cadillac Owners Connoisseur
    Automobile(s): 98 DeVille, 97 DeVille d'Elegance
    Join Date
    Feb 2012
    Location
    NC
    Posts
    3,805
    I would check the applications to see what the specs are for your mic and see if they match. I had the opposite problem a few years ago, excessive pedal travel no matter what. Turned out to be wrong mic, that mfg listed incorrectly

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    I would check the applications to see what the specs are for your mc and see if they match. I had the opposite problem a few years ago, excessive pedal travel no matter what. Turned out to be wrong mc, that mfg listed incorrectly

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