Front calipers are antithetic from the rear ones.
Replacing the brake calipers on a 2001 Mercury Grand Marquis depends on which limitation of the machine you are changing them. The 2001 model has larger dual-piston calipers on the front brakes that have the pads installed in their mounting brackets. This makes changing them different from the smaller rear calipers with the pads directly inside them. In either case, you are letting in air when you change a caliper, and you have to bleed the air out of the system.
Instructions
Removal
1. Raise the end of the car that has the calipers that need replacing. Lower the car onto jack stands for support. Remove the wheels.
2. Use new pads if you disposed of the old ones.6. Connect the new brake caliper onto the mounting bracket and fasten it in place with its mounting bolts.
4. Remove the brake pads from the caliper. You will only need to do this for a rear caliper. Dispose of the pads if they are worn down.
Installation
5. Install the brake pads into a rear calipers. Unscrew the banjo bolt for the brake hose with a wrench and disconnect the banjo fitting from the caliper.3. Remove the caliper's mounting bolt and remove it from the front mounting bracket or rear torque plate.
Connect the brake hose with its banjo bolt.
7. Connect a hose to the caliper's bleed screw and submerge the hose's other end in a bottle partially filled with brake fluid.
8. Loosen the bleed screw with a wrench while someone else presses on the brake pedal, forcing fluid and air out of the caliper. Close the screw and repeat until you see no air bubbles in the bottle.
9. Remount the wheel. Lower the car and refill the engine's brake master cylinder reservoir with brake fluid as needed.
