Question about 2006 Pontiac Montana SV6

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Replacing the rear brake pads, piston will not compress. Any suggestions?

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Hello this is what you will need most auto part stores carry these $10 to $20.00 you will use a 3/8 drive ratchet to operate this tool your calipers turn in not like the front calipers.Replacing the rear brake pads, - regeetone_6.jpg

Posted on Jan 03, 2011

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  • Master
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I have always used the old pad and a large C-clamp to compress the piston down evenly. if this won't help it compress, loosen the bleeder valve, when compressing. There may be a one way valve on your brake line, allowing fluid to flow one way only. try this, and let me know. hope this helps

Posted on Jan 03, 2011

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1 Answer

Changing the rear brake pads and can't compress the piston into the caliper- any ideas? 2003 rendezvous


FIRST REMOVE SMALL AMOUNT OF BRAKE FLUID FROM THE BRAKE MASTERCYLINDER. THEN USE A LARGE C - CLAMP AND LEAVE THE OLD BRAKE PAD IN PLACE ON PISTON SIDE THEN COMPRESS THE PISTON IN CALIPER BORE. IF YOU SEE SIGNS OF BRAKE FLUID LEAKING AROUND PISTON SEAL.THE BRAKE CALIPER NEED REPLACING.WHEN YOU FINISH BRAKE JOB NEW BRAKE SHOES IN PLACE MAKE SURE BRAKE MASTERCYLINDER COVER BACK ON MASTERCYLINER THEN PUMP BRAKE PEDAL UNTIL NEW BRAKE PADS SEAT AGAINST BRAKE ROTOR.CHECK BRAKE FLUID LEVEL IN MASTERCYLINDER MAKE SURE ITS NOT LOW.

Aug 12, 2011 | 2003 Buick Rendezvous

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I have a 2003 tiburon and I changed the rear rotors and pads but can't seem to get the caliper back on cause the lower guide pin doesn't slide like the upper one. I have never seen this before is...


YOU NEED TO COMPRESS THE CALIPER PISTON USING SPECIAL TOOL 09580 - 3400 OR YOU CAN USE A LARGE C CLAMP AND THE OLD BRAKE SHOE NEXT TO CALIPER PISTON.BE SURE TO SIPHON OUT 1/3 BRAKE FLUID OUT OF THE MASTER CYLINDER BEFORE COMPRESSING CALIPER PISTON BACK IN THE CALIPER BORE.WHEN YOU FINISH REPLACING REPLACING REAR BRAKE SHOES.MAKE SURE BRAKE MASTERCYLINDER RESERVOIR COVER BACK ON RESERVOIR BACK IN PLACE.THEN PUMP BRAKE PEDAL TO SEAT BRAKE SHOES AGAINST ROTORS AND UNTIL YOU GET FIRM SOLID BRAKES.THEN CHECK BRAKE FLUID LEVEL.DONT DRIVE CAR IF BRAKE PEDAL FEEL SOFT NOT FIRM.CHECK FOR LEAKING BRAKE HOSE OR LEAKING CALIPER PISTON SEAL.

May 08, 2011 | 2003 Hyundai Tiburon

1 Answer

Need help in replacing front and rear brakes on a 2003 mitsubishi montero full size


Hi there,

The pads are easy to change. You do not need any special tools. If there are no grooves in the rotors I would just put on new pads. Don't get cheap pads or they will squeek. I would strongly suggest that you flush out the old brake fluid. You will be amazed at how brown and gunky the old fluid is. Flushing the fluid regularly will help make your calipers and master cylinder last a long time. I like to use Valvoline Synpower brake fluid, it is a couple bucks more but it is DOT 4.

One last tip. When compressing the brake caliper piston you do not want to push the fluid back up to the system, because you might get some crud into the ABS module. Therefore, when compressing the piston, loosen the bleed screw to let the fluid flow out of the bleed screw.

This is how to get it done:
  • Remove the old fluid from the master cylinder resevior with a turkey baster. Top up master cylinder with fluid.
  • Remove the right rear wheel and bleed/flush the brakes with the old pads on. Top up master cylinder with fluid(important). Remove the caliper, open the bleed screw and compress the piston, close the bleed screw.
  • Install new pad and caliper
  • Bleed again. Top up master cylinder with fluid.
  • Repeat on remaining 4 wheels RR, LR, RF, LF.
Glad to be of help!!!

Jan 21, 2011 | 2003 Mitsubishi Montero Sport

1 Answer

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.

Jan 01, 2011 | 2000 Buick LeSabre

1 Answer

How do I reset rear brake piston when replacing pads?


When you take the caliper off, take a large C-clamp and put on the caliper. Tightening the clamp will compress the piston. Then put the new pads on, and remount the brake caliper.

Dec 26, 2010 | 1993 Lincoln Town Car

1 Answer

Rear brake pads replace


Rent a tool from auto zone to help you compress the rear brake piston. It cannot be compressed with c clamp because the piston must be turned while it is compressed.
Autozone will charge you approx. $60 for the rental and then you get all your money back when you bring the tool back.
You need to compress the rear piston so you have room for the new, thicker pads.
The rest of the job is just like any other brake job. 1. remove one pin bolt and rotate caliper open to get to the pads. 2. compress the piston in with the tool 3. replace the pads. 4. assemble.

Oct 27, 2010 | 2008 Dodge Grand Caravan

1 Answer

How do we compress the rear brake calipers when replacing the pads?


Get a pad spreader or C-clamp leave the old pad on the piston and compress it. If you have a strong grip big channel locks will also work

Oct 11, 2010 | 1999 Oldsmobile Aurora

1 Answer

I am replacing the rear pads and cannot get the caliper to compress using a c-clamp. Is there something special I need to do or know on my montego 05 car to get the caliper to compress? Sincerely Desperate...


One, take your brake fluid reservoir cap off.
Two, use a thin piece of wood to help you compress the piston on the caliper....do it slow. This way, you don't create a lot of pressure to the reservoir and it won't overflow.
Three, these are the steps to removing and replacing the pads for the rear. It does mention a special tool....but you can use a c-clamp for the same purpose:

Rear To Remove:
  1. Check the brake fluid level in the brake master cylinder reservoir.
  2. If required, remove the fluid until the brake master cylinder reservoir is half full. CAUTION
    Care must be taken when servicing rear brake components without disconnecting the parking brake cable from the brake caliper lever.
  3. Remove the disc brake caliper. Support the caliper with mechanic's wire. CAUTION
    When the brake pads are separated from the brake caliper, new brake pads must be installed. The brake pads are one-time use only.
  4. Remove and discard the brake pads and spring clips from the brake caliper anchor plate. NOTE: Do not remove the anchor plate guide pins. The guide pins are press fit to the brake caliper anchor plate. If the guide pins are damaged a new anchor plate must be installed.
  5. Inspect the brake caliper anchor plate assembly.
  6. Check the guide pins and boots for binding or damage.
  7. Install a new brake caliper anchor plate if it is worn or damaged.
To Install:
NOTE: The left caliper piston turns clockwise and the right caliper piston turns counterclockwise.
  1. Using the special tool, turn and compress the brake caliper piston into the cylinder.
  2. Clean the residual adhesive from the brake caliper fingers and pistons using the specified brake parts cleaner. CAUTION
    Do not allow grease, oil, brake fluid or other contaminants to contact the brake pad or caliper mating surface. Do not install contaminated pads.
    NOTE: Install all the new hardware supplied with brake pad kit.
  3. Install the new spring clips and brake pads.
  4. Position the brake caliper and install the 2 bolts. Tighten caliper bolts to 23 ft-lbs (31 Nm).
  5. If necessary, fill the brake master cylinder reservoir with clean brake fluid.
  6. With the engine running, apply pressure on the brake pedal to seat the brake pads.
  7. Test the brakes for normal operation.

May 17, 2009 | 2005 Mercury Montego

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