Brake Pedal sinking to the floor occasionally, failing MC? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-13-2007, 10:01 AM   #11
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Measure yours. You'll be asked when you ask for one. Yes, the length of the body measured along the piston housing, not including the flange. Just the long round part with the fittings in it, excluding the thickness of the mounting flange that bolts to the booster.

Again, see my general chat topic. It'* clearly explained.
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Old 12-20-2007, 02:21 PM   #12
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OK! Time to replace it!

Almost got in a accident just a few minutes ago. A lady pulled out in front of me when I was doing 50mph on 50mph 5 lane US Route 6. I slammed on the brakes and guess what? Barely any brakes!!!! Sunk RIGHT to the floor!! I panicked and started pressing on the emergency brake and swerved to get out of her way. I was SO close to hitting her it was unbelieveable, I was literally 5 feet away from slamming her stupid *** in her ugly *** Focus. SO, now the Bonne is parked 'till I get the master cylinder installed. I am SO paranoid right now, that I am still shaking. :(

A note to everyone - REPLACE your master cylinder if you are experiencing the same problem, or it could cost you your car, or worse, your life.

EDIT - I did get her license plate number, and plan to call the police, I also have a witness, my friend was driving her GA behind me and saw it all. Should I?
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Old 12-20-2007, 03:00 PM   #13
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You drove with your bad rear tires?

For shame
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Old 12-20-2007, 04:02 PM   #14
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The Rings in the master are done and you are not building any brake line pressure to acuate the brakes...

Let us know when you get it fixed

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Old 12-22-2007, 02:02 AM   #15
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Quote:
Originally Posted by Bonneville92V688

EDIT - I did get her license plate number, and plan to call the police, I also have a witness, my friend was driving her GA behind me and saw it all. Should I?
No. You drove your vehicle with a KNOWN brake problem that risked not only your life but the lives of others on the road. If you had a properly working brake system then I am sure you would not have had that close of a call. The brakes are the most important component on a vehicle. If you cant afford to fix it or dont have the time then you should park it. You could have killed yourself or some innocent family. I will not let a car leave my shop that is a safety hazard like that without signing a unsafe vehicle from. And if its real bad, then it will only leave on a tow truck or I will call the police. Too many people get hurt or killed in accident that could have been prevented. Just my $.02
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Old 12-22-2007, 10:33 AM   #16
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Let'* get back to the mechanicals and lay the morals to rest. This is a mechanical section of the Forum.

A rebuilt MC should be in the 40 dollar range. I'm very happy with mine (from NAPA).
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Old 12-22-2007, 10:35 AM   #17
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Yup, picked one up at Napa yesterday for $37.99. It'll go on today, 48* out, and a perfect time to do it.
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Old 12-22-2007, 10:51 AM   #18
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I'm assuming the MC was 8" on yours? Enjoy the balmy weather. I have two heaters running in my garage trying to keep it at an even 65. Do you have a vice for the bench bleeding?
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Old 12-22-2007, 11:15 AM   #19
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Yeah it'* a 8". Got 3 or 4 vises attached to the work table downstairs. I'm sure it will fit in one of them.
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Old 12-22-2007, 11:39 AM   #20
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Instructions should be in the box. Clamp the flange bottom only. Not the body. Sounds like you'll be ready to swap 'em in an hour.
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