Mechanics

BRAKES

1992 Buick Lesabre • 6 cylinder Automatic • 1 miles

I'm a repeat customer, lol. Just had a question answered about my heating unit but now i'm having a problem with my brakes on my 1992 Buick Lesabre. The brake booster went out, we replaced, then the master cylinder went out, and we replaced that too. Now we are having trouble still with getting pressure to build up. It will build up if I RAPIDLY pump the brakes (about 5x before pressure builds up). We've attempted several times to bleed from the master cylinder and are still having problems. We've checked all the lines, and there are no leaks. Should we continue to bleed the master cylinder AND the lines or is there something we are missing? I appreciate the help greatly!
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Missjody
November 22, 2010.




When bleeding, are you starting from the right rear and working to the closest brake? (Right rear, left rear, right front, left front) Also, does the pedal go to the floor?

We only tried to bleed from the master cylinder last night. The pedal does go all the way to the floor, if the motor is running. Straight to the floor. This has been an on-going problem for me. Been dealing with the brakes on this car for about 6 weeks now. From the sounds of it, does it just seem like we need to continue bleeding the lines? Or does it sound like there's possibly something else going on? Joe, I really really appreciate the help you've given me. Its been very precise and has helped me out tremendously.

Tiny
Missjody
Nov 22, 2010.
I'm glad to help. I just want to help get this fixed. I have to be honest. Even though you replaced the master cylender, it sounds bad. That is if nothing is leaking. Did you "bench bleed" the master cylender prior to installing it? Also, have you bled the brakes at each wheel starting at the farthest wheel (pass side rear) and working to the closest?

Let me know. We'll figure this out.

Joe
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