Question about 2003 Buick LeSabre

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I have done several front brake repairs with disc and several rear brake repairs with drum, however, never a rear with disc. Anything special I need to be aware of with the rear on a 2003 Lesabre Buick

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If your car has ABS, then the rears may have the abs sensor as well since it's a disc

Posted on Sep 11, 2009

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I've never done one on a Buick, but the rear disks usually contain an emergency drum brake on the inside of the rotor that can make the rotor a "buick" to remove. I did my full size van and had to take it down the street to heat it up to get one side off.

There are also some cars with a rotating piston on the cylinder to act as a parking brake. This makes it necessary to rotate it to get the cylinder to retract - instead of just mashing it back in with a C-clamp....

I'm not sure which the 2003 Buick has, but it would be worth buying a Haynes manual to find out.

Posted on Sep 11, 2009

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Nothing special ...
No "self adjuster" like typical rear drums...

Go for it!

Posted on Sep 11, 2009

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Brake peddle is low,


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What tools do i need to repair the rear brakes ? is their also a special tool to pull the rear drum off ?


I don't mean to offend, but if you don't know which tools are required or how to remove the rear drum, the only advice I can give, is to have the brakes serviced by a trained technician. There are certain areas of auto repair that the do-it-yourselfer should not work on. The brake system is one of those. There is too much at stake if the job isn't done right. The safety of you and your family, and the guy in front of you on the highway when traffic comes to a halt at 70mph and your brakes fail. Everybody, me included, would like to think they can fix anything. But there are things best left to the pros. Again, I don't mean to offend, or imply that you are not a good mechanic. It's just the only answer I can give considering the circumstances.

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Can you tell me if it takes special tools to remove the rear brake hub and brake line


No, there are no special tools required beyond everyday hand tools.

Raise the vehicle.
Remove the rear wheel and tire assembly from the vehicle If the vehicle is equipped with rear drum brakes, remove any retainer clips from the wheel mounting studs, then pull the brake drum off the hub and bearing.
If the vehicle is equipped with rear disc brakes perform the following:
Remove the two guide pin bolts securing the front disc brake caliper to the steering knuckle.
Remove the disc brake caliper from the knuckle and brake rotor.
Hang the caliper out of the way using a wire hanger or cord. Do not support the caliper by letting it hang by the hydraulic hose.
Remove any retainer clips from the wheel mounting studs, then pull the brake rotor off the hub and bearing.
Remove the dust cap from the hub and bearing assembly
Remove the retaining nut, then the hub and bearing from the knuckle's spindle

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This is a big job for such a small part. I suggest you repair/replace rotors, pads, and anything else back there while you are at it. You will need to remove both wheels on both sides, as well as the axles (I think). See my earlier post on Rear Rotor removal to see how this is done.

You will need a large spindle nut to remove the axles.

DISASSEMBLY:
Once you have access to the parking brakes inside the rotor hat:
1. Lock out the parking brake w/a pair of Vise grips (on the parking brake cable under the cab)
2. Disengage teh park brake cable from behind the rotor assembly to allow easier disassembly of the parking brake shoes.
3. Disassemble the rear park brake shoes.

REASSEMBLY:
1. Reassemble the rear parking brake shoes. This is a typical, small brake drum configuration. Do one side at a time - so you can see how to reassemble each small part. Keep the springs and parts oriented the same: front to front and interior to interior, etc.
2. Release the parking brake cable
3. Install the disc brake rotor(s)
4. Install the disc brake caliper(s)
5. Install tire & wheel assembly
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1 Answer

What kind of brakes are on this car (front and rear)?


It depends on model. Most cars have disc brakes in front and drum brakes in rear. Some cars have disc brakes front and rear. Look through the front wheels, you will see the front disc, now look at the rear, if it looks like the fronts, you have 4 wheel disc brakes, if you cant see anything behind the wheel, it has rear drum brakes.

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You will probably not need anything other than a metric socket wrench set.

Many Toyota models have disc brake calipers that will flip up or down when you remove one of the two bolts that hold the calipers on. I am not sure of the setup on the Sienna.

When you remove either the upper or lower bolt and move the caliper, you can then remove the old pads. Also, you will need to push the piston(s) back into their cylinders to give you enough space to install the new pads. A large C clamp will usually suffice to push in the pistons.

I assume that you are talking about the front (disc) brakes. Some autos still have drum brakes on the rear, and those are a different story. They require several specialty tools to remove and replace the shoes.

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