Question about 1995 Buick LeSabre

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95 Buick LeSabre, brakes will only hold for a week then have to re bleed the system.has new master cylinder,Any ideas

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Check all your brake lines especially those going to the bleeder valve where you find the most air when bleeding. Also check for leaks at the rear of the master cylinder and at the calipers and wheel cylinders. If either half of the master cylinder is going low, that shows you there is a leak somewhere. If it's staying full, I'd suspect the master as having an internal bypassing problem.

Posted on May 27, 2011

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1 Answer

How to know if the brake booster is bad on a 95 buick lesabre


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While sitting at a traffic light the brake pedal slowly goes down. One pump and it comes back up to normal and holds. This is a '95 LeSabre very low mileage (31,000) very clean car. No signs of brake fluid...


There might not be a leak but I think there is AIR within the hydraulics. So if you have not checked your brake hydraulics for a very long time, it is good to check the master and brake cylinders.
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Apr 05, 2011 | 1995 Buick LeSabre

1 Answer

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you may have to run the motor as you bleed the brakes so the abs hydraulic unit can purge any air that might be caught within the unit itself.did you bench bleed the master cylinder before installing it on the car.this can save time and reduce the possible chance of air entering the system.make sure you don`t allow the master cylinder to run low on brake fluid.i also assume that you are bleeding the brakes properly.Left front brake works with Right rear brake and Right front brake works with Left rear brake.this is how the brakes should be bleed.

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1 Answer

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1 Answer

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1992 Buick LeSabre brakes bleed but very lil brake at pedle


start bleeding your brakes from the rear wheels and work your way to the front. I'm assuming you already did a pad change since you say you got the air out. make sure you keep the fluid level and not let it get too low while you're bleeding them or air will get into the master cylinder and you have to start all over again. Make sure you have someone help you that is competent enough to hold the brake pedal down all the way and not let off even the slightest bit until you get the bleeder screw tightened.

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1 Answer

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