Question about Buick LeSabre

3 Answers

I have a Lesabre 1994, I was facing a defected front Brakes discs, so I repaired them & returned the old brake pads to the system since they were semi New! In the same day, I noticed that the break pedal is going very low when using the brakes1 I returned to the garage, and I told him the matter, so he told me to wait more days in order the discs and the pads to take their normal position. I did so, but the same low pedal still exist, so I returned to him and he pushed the air out from the brakes tubes, but nothing changed! I asked another garage about the matter, and after he checked it, he said "the Brake pump should be replaced" then I did so, but the brakes became worse than ever! The 3rd garage checked it out today, and I told him the bad history with the brakes, and after he checks it he said: "the Brake Servo need to be replaced"!!! So what may be the real problem? Noting that the brakes fluid is not decreasing or going out anywhere thru all the last period and till now!

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  • shamad312 May 31, 2010

    The new thing done today for the car with the 3rd garage is:
    adjusting the drag rate in rear drum brake system, and the result is : more less braking powerm so I can say: ther is 90% no Braking power!
    pls advise.

  • shamad312 May 31, 2010

    Do you have any other advises?

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3 Answers

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  • Master
  • 2,841 Answers

First off you should have replaced the brake pads with new ones and had the rotors turned. If after all you have done you still do not have solid brakes it very well can be the brake booster is defective or it can be just a hole in the vacuum line going to the booster. Your car is 16 years old. I recommend you replace every vacuum line under the hood. You may have multiple vacuum leaks causing a low vacuum condition which will cause what you describe. This is a cheap and easy fix. Replace them one at a time as to not get confused. A simple vacuum test will tell you if the brake booster is bad or not. You also do no mention the Master Cylinder. I recommend you replace it today. A bad Master Cylinder will cause your symptoms. So in other words replace the Master Cylinder and all under-hood vacuum lines and test the brake booster and replace if necessary. This should solve your problem.

Posted on May 31, 2010

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  • Master
  • 952 Answers

Hello,

Thanks for using FixYa. If the brake pedal wasn't low before you initially had your front brakes repaired, it could be a simple brake pedal adjustment issue. Also, the brake system need to be bleed properly. For the Lesabre, all four brake fluid release valves for the 4 wheels need to be bleed. The mechanic that you came to might have just bled the master cylinder for the brake system which is the easiest and most convenient way to bleed the brake system and push out air. That is wrong and is a bad habit for a lazy tenured mechanic. Have all brake fluid release valves bled properly and have the brake pedal adjusted before you buy anything else...

I hope this helps. Thanks and good day.
HotRatchet

Posted on May 31, 2010

  • shamad312 May 31, 2010

    1-the pedal was very normal before the 1st garage touvh the car.

    2-the 4 valves were bleeden normally.

    3-so I dont think the pedal needs any adjustment

    pls advise.

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  • Master
  • 3,489 Answers

You're driving a front disc, rear drum brake system. Everything you just told me is, the wrong pads were used to begin with which caused a low pedal and inferrior stopping power. Brake pads don't "build up". That's someone who doesn't understand brakes to begin with. Plain dumb. Anyways, 1. replace your brake pads with a quality AC Delco pad 2. move to the rear drum brake system and adjust the drag rate at which the shoes need to be set. This is where the shoes get adjusted against the drum but with a liight drag so that when we stop the hydraulic pressure equalizes and moves back to the front with more force and creates a very nice, solid, comfortable braking experience. They can bleed the brakes all they want, it wont do a damn thing. So in a recap 1. replace the fronts(AC Delco), 2. adjust the rear drums and 3. test drive with the mechanic who perfromed the job. I sure as hell would not go back to the 3 places that you did before.

Posted on May 31, 2010

  • 2 more comments 
  • Kori Policy
    Kori Policy May 31, 2010

    They are not doing something right and are probably trying to soak you for more money. Procede in the steps I gave you and you will see a dramatic improvement!!

  • shamad312 May 31, 2010

    you should know that 1st garage action were sharpinging both of the front brake discs+returning the used pads, so should I replace the fromnt Discs in addition to the brake pads?

  • Kori Policy
    Kori Policy May 31, 2010

    If they used an inferior pads with new discs, I personally would NOT allow them return the pads and shave money off something they should return and get new again. The way they make rotors now days are so thin to begin with that by the time you get to have to replace pads again, they will not be able to machine the rotors because they already did and guess whos going to pay the cost.....YOU!! Don't let them. It's there mistake for wanting to be cheap, make them fix it.

  • Kori Policy
    Kori Policy May 31, 2010

    They are addressing a vital safety situation and should be doing everything to reduce their liability, NOT trying to just get you out of there. If you get into an accident and you can prove your car was unsafe and they swore you are fine, you own them!!

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