This will be a short guide on how to change your rear brake pads on a CRX or Civic with rear disc brakes. It should be noted that proper procedure would dictate having your rotors turned on a lathe any time new brake pads are being installed. Some go as far as replacing the rotors with brand new ones with each pad change. Aggressive compound racing pads eat through rotors more quickly. I always check my rotors for warp, grooves, and pitting, and have them turned if they are not within specification. Unless you have other problems, you can usually get away with NOT turning your rotors. Proceed at your own risk I will not be held liable for anything you damage as a result of this DIY guide.
Make sure you have the proper front and rear pads for your car before you start the project. If your brakes are oversized or included swapped parts from another car, make sure to order pads for the proper calipers.
Set the parking brake and put the car in first gear. You may want to loosen the rear lugnuts now, but I prefer to loosen them with the rear wheels in the air because it serves as a basic two-side parking brake test.
Jack up the rear of the car. I prefer to use the tow hook because it will lift both sides of the car if on level ground.
Set your jack stands at the proper lift points, just forward of the rear wheels. Lower the car onto the jack stands and shake the chassis to make sure everything has settled solidly.
Remove the lug nuts. If you can't figure this step out, do not proceed.
The first part to come off will be the dust shield, located above the caliper.
It is held on by two 10mm-head bolts. One is located here.
The other is on the back of the dust shield, horizontally penetrating the rear trailing arm.
You may now disengage the parking brake.
Now remove the two caliper mounting bolts. They should be 12/14mm-head depending on what brake parts you have.
It's possible to change pads without removing both bolts, but I prefer to inspect the caliper slide pins for wear and removing both bolts makes the pad installation much easier.
With the parking brake cable still connected, you should be able to swing the caliper off the rotor and away from the old pads.
Now would be a good time to use a dial indicator and check the rear rotors for warp and assure they are within proper specifications without being turned on a lathe.
These are the pads for the rear right caliper. I always install the pad with the squealer tab inside, with the tab facing down.
Depending on which calipers you have, you may have to use a tool to 'screw' the piston back into the caliper. If you see no markings or indentations on the piston, you should be safe to use a C-clamp to press the piston back into the caliper.
If you do not have access to the proper specialty tool, a screwdriver or pair of needlenose pliers should suffice.
Now we turn our attention elsewhere. Set the caliper aside and carefully remove the two slide pins from the rubber dust boots holding them in the caliper brackets.
Wipe the pins clean, wipe the inside of the dust boots, and spray some parts cleaner in the caliper bracket holes to get all the old grease and dirt cleaned off. Then apply a small amount of high-temp synthetic brake caliper grease to the pins.
Be sure to coat all sides of the pin for even lubrication.
Carefully reinstall the greased pins and dust boots into the caliper bracket.
You may need to separate the dust boots from the pins while you seat them in the bracket. Air can become trapped between the boot and the pin, causing the boot to balloon up because of the air pressure inside it.
A small screwdriver or pick can be used to free this trapped air.
Reinstall both caliper securing bolts into the pins, snugly mounting the caliper around the new pads you have loaded into the caliper bracket.
Torque the upper and lower caliper mounting bolts to the recommended torque specification. These trailing arms and calipers happen to be off of a 94' Del Sol VTEC, which required 17ft/lbs. Depending on the brake parts you have, your proper torque specifications may vary.
Reinstall the upper and lower 10mm-head caliper cover mounting bolts. Do not overtorque.
Set the parking brake and reinstall the wheel. Snug all four lugnuts and lower the vehicle onto the ground. Torque the lug nuts to recommended torque specification listed in your shop manual. Most honda lug nuts require 80ft/lb of torque, but you may want a higher torque number with aftermarket lug nuts and studs.
Follow the recommended procedure for properly breaking in your new pads. Due to rotor runout, incongruencies between pad and rotor surface, and other factors, your brakes may be very weak for the first few stops. Be cautious and test your new pads out in a controlled area, with a large runoff if you should have a problem.