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Old August 8th, 2009, 03:28 PM   #1
Dieselphreak2000
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Default Brakes not working well....but working.

Ok, I'm lost as to what this might be, so I will tell the story from day one.

I drive my '97 K1500 540 miles to home and back to work each weekend. Its been at least a year since i've changed the brakes. Over the last month the pedal has been falling farther and farther to stop me. Now it's getting scary. So, I went to town, grabbed pads and rotors, pull off the old ones and,... they're fine. The pads have 70% life left, check the rear, needed a little adjustment, but still fine.... The brake warning light is on, no fluid is leaking, and it has plenty in the reservoir. What's wrong? The pistons move in the calipers, and I freed up everything in the rear brakes. Still stops but the pedal is damn near the floor and it doesn't stop very fast. Any ideas?
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Old August 8th, 2009, 03:42 PM   #2
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internal M/S leak? Booster working ok?
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Old August 8th, 2009, 03:56 PM   #3
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That's kinda what I thought. But It's not leaking fluiD, and the fluid level hasnt gone down either. I think I'm going to replace the booster.

I also remembered, every few times that I bring it to a stop i get a sort of "creaking", as i hold the pedal down. not from the wheels, but like its in the dash.

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Old August 8th, 2009, 06:01 PM   #4
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i think the master cylinder is leaking internally. it won't leak fluid outside but will cause the pedal to sink to the floor
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Old August 8th, 2009, 06:27 PM   #5
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i think the master cylinder is leaking internally. it won't leak fluid outside but will cause the pedal to sink to the floor
+1 Internal seals are leaking.
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Old August 8th, 2009, 09:29 PM   #6
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yup go for it
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Old August 8th, 2009, 09:56 PM   #7
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Quote:
Originally Posted by Dieselphreak2000 View Post
That's kinda what I thought. But It's not leaking fluiD, and the fluid level hasnt gone down either. I think I'm going to replace the booster.

I also remembered, every few times that I bring it to a stop i get a sort of "creaking", as i hold the pedal down. not from the wheels, but like its in the dash.
the booster does not effect pedal travel at all and they are a pita to replace, only mess with the booster if you have an overly stiff pedal.
sounds like your master cylinder seals are shot, you can rebuild or replace it then bleed the system.
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Old August 9th, 2009, 12:31 AM   #8
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Ahh, okay. Sounds like it going to be the master cyl. Any tips before I tear into this? And thank you to all.....
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