Question about 2005 Mercury Montego

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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 Driver

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  • Mercury Master
  • 2,984 Answers

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.

Posted on May 17, 2009

  • 1 more comment 
  • Greg Bernett
    Greg Bernett May 17, 2009

    I forgot to mention....sometimes the calipers are a really bugger tocompress the pistons. I have broke 2 c-clamps before trying to compress pistons!

  • MikeSED Dec 29, 2010

    Actually,you don't compress the piston in the conventional way (I had this problem before and even bent the C clams). You need to buy a tool in the shape of a cube that you adapt to a socket driver. The pistons need to be rotated, the driver side clockwise,and the pass side counterclockwise. the tool (I do not remember it's name) it's about 6 USD and you can find it in any Autozone, or O'reillys.

  • Warren LaTour
    Warren LaTour Dec 02, 2013

    I had replaced all my brakes on my Montego. I replaced the rotors, Calibers and pads. The rear Calibers and different because the emergeny brake turns a screw inside them be careful on turning it back. I replaced mine due to rust.

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