Q: How to Maintain and Fix a Brake Caliper on 2002 Dodge Ram 1500?
A: Install a prop rod on the brake pedal to keep pressure in the system, raise the vehicle and use supports to maintain it in place. Take off the wheel and tire unit, then use a suction gun to drain a little fluid from the master cylinder reservoir. When changing the rear caliper, take off the brake banjo bolt, then the slide pin bolts on the mounting pin and finally remove the caliper from the car. Ensure the front caliper is properly supported so it doesn't hang from the brake pipe, then use a C-clamp to compress it, remove the banjo bolt and washer and take out the caliper slide pin bolts before you can remove the caliper. Take off the brake fluid from the caliper, wedge a C-clamp with a block of wood over one piston to protect it and put another padded wood block in front of the other piston. Don't use forceful stream of air to remove the pistons because it might damage them. Carefully take out the piston dust boots and their seals so as not to scratch the piston bore and remove the caliper mounting bolt bushings from the boot seals. If you spot cracks or scoring on the pistons or if they are severely scratched, replace them. If the bore contains minor marks, fix them with a light polishing; if the caliper is significantly damaged, replace it. When you do the final assembly, tidy the area, lubricate the pistons, seals and bores with clean brake fluid and ensure the new piston seals are fully in the cylinder bores. Install the dust boots by pressing the pistons into the caliper bore and use the correct tools to get them seated. On the mounting bolts within the caliper, use Mopar brake grease or Dow Corning 807 grease and lubricate both bushings and boot seals, put the seals and bushings in and finish by adding the bleed screw. If the installation is at the rear, first put on the caliper, apply silicone grease to the slide pin bolts and tighten to 15 Nm (11 ft. lbs.), then connect the brake hose banjo bolt and hose using new seal washers and tighten them to 31 Nm (23 ft. lbs.). Lift the prop rod, let the brakes rest for a few minutes, place the wheel and tire assemblies, lower the car and check that the pedal feels stable. To secure a caliper by threading the bolts through its holes, add new copper washers to the outer banjo bolt, tighten the outer bolt to 27 Nm (20 ft. lbs.) and tighten the slide pin bolts to 32 Nm (24 ft. lbs.). Finish by removing the prop rod and bleeding the braking system, install your fitted wheel and lower the car.