Question about 2004 Buick LeSabre

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Can't compress piston on rear caliper when replacing pads 2004 LeSabre

Why can i not compress the piston on the rear caliper on my 2004 LeSabre?

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  • Mike Butler
    Mike Butler May 11, 2010

    Have you tried a "C" clamp, slowly?

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All you need is a pair of needle nose pliers. With the pads removed and the mount bolts for the caliper out you can position the caliper so that with your other hand holding the pliers slightly open, (enough so that the points fit into the slot on the face of the piston) press the pliers against the piston firmly and twist. One direction or the other will screw the piston back into the caliper. Simple!

Posted on May 13, 2009

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It takes a special tool that turns and rotates it down. lis28600.Lisle tool

Posted on Apr 21, 2009

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1 Answer

How do you compress the break caliper on a 2004 Kia sorento


IS THIS A REAR OR FRONT CALIPER?
1. FRONT CALIPER: INSERT A LARGE C CLAMP WITH THE SCREW END INTO OPEN BORE OF CALIPER PISTON, THE STATIONARY END SHOULD BE SNUG AGAINST THE CALIPER END HOUSING: THAT THE PISTON MOVES IN AND OUT OF
COMPRESS C-CLAMP UNTIL CALIPER PISTON SEATS FULLY AGAINST THE CALIPER SEAL. INSTALL NEW PADS
2. REAR CALIPER: RENT AT AUTOZONE A REAR DISC CALIPER COMPRESSION TOOL. THESE CALIPER PISTONS WIND IN CLOCKWISE, INSTEAD OF JUST SLIDING BACK INTO A SMOOTH BORE. THEY HAVE GROOVES THAT FOLLOW A MATCHING SET IN THE CALIPER HOUSING.
FURTHER QUESTIONS?....JLGPROP@YAHOO.COM

May 19, 2012 | 2004 Kia Sorento

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How to retract brake caliper piston?


Hi, if this is a front caliper that is still on the rotor, I pry between the rotor and rear brake pad to push the piston in. I usually have to pull on the caliper a bit to get it retracted enough to get a screwdriver in between. If the caliper is already off the rotor, I leave the old inside pad on the piston and put a large c-clamp over the caliper to push on the pad and retract the piston. If this is a rear disk caliper or if you have any questions, please reply.

Jul 31, 2011 | 2004 Buick LeSabre

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I have a 1990 buick lesabre and i cant get one o the break pads on....... what am i doing wrong?


you may not have the caliper pistons fully compressed so the brake pads will not go back on. Place a large C-clamp over the left inboard caliper housing and the outboard pad, and tighten to compress the caliper piston. good-day !!

Jul 29, 2011 | 1990 Buick LeSabre

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Steps to replacing rear brake pads


A special tool is required to compress the caliper piston on the rear brakes-don't use a C-clamp on the piston.
Raise the vehicle and remove the tire. The rear calipers have only one guide pin. Remove this pin and raise the caliper. Remove the old brake pads. Using the special tool compress the caliper piston-the piston will have one or two slots on it. These slots must in the correct position to remount the caliper. Install the new brake pads and slide the caliper back over the rotor and replace the guide pin. If the caliper doesn't slide over the rotor you'll need to reset the slots on the piston. Replace the tires and you're ready to go.

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1 Answer

The piston of the rear brake caliper will not compress to fit the pads on the rotor...


On some vehicles with rear disk brakes the piston also is self adjusting to keep the pads close to the rotors. This piston screws in to back it off. Turn the piston counter clockwise to back it off.

Oct 08, 2010 | 2004 Buick LeSabre

2 Answers

Change rear break pads on 2000 Buick. Cannot compress break cylinder in order to install new pads using C clamp and bleeding off break fluid.


There's a special tool required to compress the rear caliper pistons. You may want to rent the tool. If you look at the piston you'll see one or two notches. The special tool has nipples to fit these notches. The caliper piston will have to be compressed with the tool and the notches will have to be placed in the o'clock and 6 o'clock for the brake pads to slide over the rotor. If you rent the special tool have the renter show you how to use it.

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1 Answer

Can not get rear break piston to compress to allow for new pads


The rear disk brake piston does not compress back into the caliper, it has notces on the caliper piston that a tool fits into and the caliper piston is actually turned or screwed back into the caliper, and a notch in the piston must also be aligned to fit the the small protrusion from the backing plate of the inner brake pad.

The brake tool can be obtained from most auto part stores, and it is usually square with protrusions sticking out from the sides in different patterns to fit various caliper pistons, and it usually attaches to a 3/8" drive extension and ratchet.

Do not compress this type of caliper piston because the caliper can damaged.

Jun 12, 2010 | 2004 Pontiac Grand Am

2 Answers

I cant seem to get the rear brake caliper to compress so it will fit over the new pads


There are two stlyes of calipers for the rears. One is ratcheting so the piston has to be turned back to colaspe. The other type compresses with a C clamp. If a large retaining spring is on the inner part of the caliper you have the ratcheting type. A brake cable will attach to the spring as well. If not it will compress instead

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1 Answer

Unable to compress caliper piston to replace brake pads


If the problem is with the front caliper replace it. If the problem is with the rear caliper you need a tool that will compress the piston back into the caliper by turning it. Most auto parts stores will have a caliper tool for this.

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