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post #1 of (permalink) Old 01-04-2001, 09:09 AM Thread Starter
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Spongy brakes?!?

The last thing I gotta fix on my rig (for now) is the brakes. I can not lock up the brakes. The pedal seems to just bottom out. It works ok sorta, just not strong enough. The front pads are still 3/8 thick. It also pulls to the left a little. Fluid level is OK, booster pumps up to stiffen with ignition off. So what gives? I'm going to put on longer SS brake lines but I've driven other jeeps with GREAT stock brakes! Is there any adjustment I can make? Could it be air in the system? I haven't bled it yet. What are the signs telling you guys? Jeep is: '91 YJ I-6 with 125K on it. Thanks for your help.

'91 YJ, I-6, 3" lift, 31s
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post #2 of (permalink) Old 01-04-2001, 09:24 AM
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Re: Spongy brakes?!?

Sounds like air in the lines. The air is compressing when you step on the pedal and making it fell spongy. Bleed all the lines and you should feel a big difference.

80 CJ7,256,T176,36's

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post #3 of (permalink) Old 01-04-2001, 09:41 AM
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Re: Spongy brakes?!?

Did you remove any of the brake lines recently? You need to bleed the system if you did. Spongy pedal indicates air in the system.
Otherwise I would look for any leaks in the rear wheel cylinders or hard lines.
Your master could also be leaking internally.
Oh, and make sure your rear drums and parking brake are properly adjusted also.
'79 CJ-7
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post #4 of (permalink) Old 01-04-2001, 09:52 AM
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Re: Spongy brakes?!?

Sounds to me like your master brake cylinder is on its way out, this is exactly the way mine acted when it needed to be replaced.

post #5 of (permalink) Old 01-04-2001, 11:49 AM
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Re: Spongy brakes?!?

Don't forget to check the brake lines. The rubber ones expand as they age and can cause the pedal to feel a little mushy....

Tommy B. in AZ -
More Guts than Brains.
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