Rear brake line blew up.
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, Rear brake line blew up. in Past Cadillac Vehicle Discussion; Well, lost brakes, almost crashed into another vehicle. This car has not been ever driven in a snow, lines looked ...
  1. #1
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Rear brake line blew up.

    Well, lost brakes, almost crashed into another vehicle. This car has not been ever driven in a snow, lines looked solid and, nevertheless, I see brake fluid dripping under left rear passenger door.
    Has anybody had a good luck with prefabricated kits for 1995 Fleetwood Brougham? Any reliable source? I am pressed for time. I need to fix it within a couple of days. No lift, just a jack. Thank you!

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    jayoldschool's Avatar
    jayoldschool is offline Super Moderator
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    Re: Rear break line blew up.

    Super normal for these cars that have seen any road salt. Every single one I've owned broke that line. This is a tough job to do without a lift, but you could pull it off. I did one one my back, all the other ones since on a lift. Just cut out the bad section, flare, add unions, and put in a pre-flared section. Available at any parts store.

    You need:
    mini tubing cutter
    brake flare tool
    section of preflare
    brake fluid
    buddy to help you bleed (and hope those bleeders crack open or you're replacing wheel cylinders, too)

  4. #3
    91FleetwoodCoupe's Avatar
    91FleetwoodCoupe is offline Cadillac Owners Fanatic
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    Re: Rear break line blew up.

    I had it happen on my '91 Fleetwood coupe about a month ago. A shop fabricated and installed the new rear line (just one line for both rear wheels) for me and I paid $185.

  5. #4
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: Rear break line blew up.

    The line blew up right by the fuel filter. I am afraid I will have to plug the rear lines at the hydraulic modulator with a ball from a ball bearing and use only the front ones for a while. I'll replace the bad sections (so far two) as soon as I have a chance. I am in the middle of a trip I cannot postpone anymore.

  6. #5
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: Rear break line blew up.

    What are the fitting threads for rear brake lines at the hydraulic modulator? One is 10 mm , the other is 12 mm, as for threads , they both seem to be 10 mm. Am I correct? Are they indeed metric?

  7. #6
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    Re: Rear break line blew up.

    They are metric, bubble flare, not double.

    Please, don't drive it until fixed. Please.
    soy_chingon13 and RedCadi like this.

  8. #7
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: Rear break line blew up.

    Yep, 10 mm x 1 mm and 12 mm x 1 mm. A 6 mm ball from a ball bearing sealed the both exits for rear brake lines, so no more break fluid loss. There is a wet spot in front (not under) master cylinder , though. Maybe overfilled the reservoir? But it is a few inches away from master cylinder. Another mystery. Of course, I am reluctant to drive with only front ones. Have done it many years ago with my other Caddy and the front lines blew up shortly. Now, that was bad.

  9. #8
    DB2Guy is offline Cadillac Owners Connoisseur
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    Re: Rear brake line blew up.

    Check with Inlinetube. They may sell the complete brake line set. I bought a set for my '90 Fleetwood. I don't recall what I paid. I found the set on eBay sold by Inlinetube. Their website has a catalog but I don't know how up to date it is. Email or phone them and ask. Seems like what I bought are stainless steel or have nickel alloy added to detour corrosion. Piecemeal replacement cost too much so just replace them all to be safe would be my advice.

    https://www.inlinetube.com/

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    DB2Guy is offline Cadillac Owners Connoisseur
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    Re: Rear break line blew up.

    I did an eBay search on "inlinetube brake line 1995 cadillac". There are several listed.
    This is just one listing I found. $160

    https://www.ebay.com/itm/1995-1996-C...kAAOSw7btaoY5y
    soy_chingon13 likes this.

  11. #10
    HUF's Avatar
    HUF
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    DB2Guy,
    Thank you!

  12. #11
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
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    Re: Rear brake line blew up.

    Upon closer inspection, there are several suspicious spots so the both rear brake lines should be replaced between two green lines in the picture. It is just easier to cut and flare the lines in those spots.
    1. Do I really need all those bents, or I can do something more streamlined and attach it to the frame with cable ties or copper wire?
    2. Is this brake line a right choice for the job? It says SAE flare nuts, but does not say what thread they are. Are these right unions (3/8" -24) for the nuts?
    3. All flares should be double flares, correct?IMG_20190513_201331.jpg

  13. #12
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    silverfox103 is offline Cadillac Owners Enthusiast
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    Re: Rear brake line blew up.

    Huf

    You need to fix the brakes correctly, putting in little pieces here and there doesn't cut it. That's rinky dinky. I had the same thing done on my 96 FW last year, front to back, both sides --------$321. My car only had 70K and never used in the winter.

    I don't get why you're spending all this time to figure out how to not do it correctly. I'm also guessing your're still driving it around, a week later.

    Think Smart!

    Tom
    brougham and RedCadi like this.

  14. #13
    brougham is offline Cadillac Owners Master
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    Re: Rear brake line blew up.

    You need to do the proper amount of bends to make the lines fit properly and not rub anything. If there are multiple areas that look bad you're better off replacing the whole line from fitting to fitting.
    If you need to drive the car and it's becoming an issue trying to figure out the fix play it safe and get a shop to do it.
    silverfox103 and RedCadi like this.

  15. #14
    RedCadi is offline Cadillac Owners Enthusiast
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    Re: Rear brake line blew up.

    Every Cadillac I've ever owned lost brake lines from time to time. I had them transported to the mechanic. Car was back on the road the next day. It's not worth putting yourself and other motorists at risk with faulty brakes.

    BTW my dad's Cads lost brake lines when I was a kid. Just something that happens.
    silverfox103 likes this.

  16. #15
    Johnfull is offline Cadillac Owners Fanatic
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    Re: Rear brake line blew up.

    Anything about the brake lines that causes a soft pedal, even right after a complete brake job?
    My mechanic says it's normal, but I have to drive with my head in the steering wheel to get my foot close enough for all that travel.
    I've not seen any drips on the garage floor. When RediCadi said it's normal to lose brakes on a Caddie, I had to jump in...

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