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Author
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Topic: Symptom of bad brake lines?
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Fastback68
Gearhead Posts: 3053
From: Sucat, Paranaque, Philippines
Registered: Jul 99
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posted 04-06-2004 11:35 PM
   
My brakes have become very soft. I replaced the internals of the master cylinder and it improved things, but now they're soft again. The pads are good and properly adjusted. The MC stays full, and there's no sign of leaking. But when I bleed the brakes, the fluid doesn't SQUIRT out but requires a lot of pumping to get it to dribble.
On this particular car, I've never replaced the brake lines. Is it possible they are simply clogged?
Thanks!
Simon
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SteveLaRiviere
Administrator Posts: 42859
From: Saco, Maine
Registered: May 99
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posted 04-07-2004 07:28 AM
The rubber hoses are known to delaminate on the inside with age. Brake lines are so cheap and so crucial I replace them at the slightest question.------------------
'70 Mustang Mach 1 351C 4V/FMX/3.25 Open
'70 Mustang Convertible 250 I6/3 speed/2.79 Open
'72 Mustang Sprint Hardtop 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
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TT670
Journeyman Posts: 16
From: NY, USA
Registered: Apr 2004
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posted 04-07-2004 09:04 AM
I agree on the rubber lines, they break down on the inside and create and obstruction. Other thatn that the only thing I can think of that would indicate a bad line would be a puddle on the garage floor. Improperly adjusted drum brakes can also create alot fo pedal travel and make for spongy feeling brakes. [This message has been edited by TT670 (edited 04-07-2004).]
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ddenton749
Gearhead Posts: 366
From: Kennett Square, PA, USA
Registered: Apr 2004
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posted 04-07-2004 09:56 AM
It sounds like you may have an internal leak in the master cylinder. Try pumping up the brakes and then hold the pedal down. If the pedal drops, and there are no external leaks anywhere, the MC is bad.
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