You need a big towel you won't mind losing, lots of shop rags and brake parts cleaner, a garbage bag, a long zip tie, and a small - 3" will do it - C-clamp...in addition to the normal screwdrivers, wrenches, pliers, etc. First, pop the hood, jack up the back of the car, support it on jackstands, and remove both wheels. Then remove the brake pads.
Now for the fun part. Go into the engine compartment. Wrap the towel around the bottom of your master cylinder, then put the bag around the towel. Remove the brake fluid cap, then wrap the bag around the whole thing and zip-tie it to the master cylinder. (You'll understand why in a second.)
Go back to the wheel and use the C-clamp to compress the rear brake caliper pistons. Do all the brake work you were going to on the back of your car.
The reason you did all the stuff with the towel and bag, is every time you compress the brake caliper pistons brake fluid will squirt out of the master cylinder. Since it dissolves paint you don't want it flying all over the place. So...now you can open the bag, carefully remove it, and use brake cleaner on rags to clean off the master cylinder and reservoir.
Use a large pair of needle-nose pliers to turn the piston back into the caliper. There is also a "special tool" available which helps push in while turning, but I have never had to use it.
I assume you could not compress the caliber, The caliber on the Accord must be turned while being compressed, There is a special tool for this. Some Auto Parts stores will lend you the tool if you purchase the pads from them. Answer: When buying ammunition, be sure and specify the proper caliber. When buying brake parts for your Honda Accord, you'll need to compress the caliper, not the caliber.
You need a special caliper compression tool. Unlike most calipers, the Honda calipers must be twisted at the same time as they are compressed. The tool compresses and turns the caliper at the same time. You can rent one for free at Advance & Auto Zone, if you purchase the pads from them.
You twist it in. use a big screw driver or big flat object to screw it in counter clockwise. You will see a big slit in the piston to do this
Turn counterclockwise to remove them.
slider needs high temp grease.
The rear caliber must be turned at the same time it is compressed. There is a special tool designed for this purpose. Most auto parts stores will loan you the tool to accomplish this if you buy the parts from them.
You need to rotate the piston counter clockwise.
According to the 1994-1997 Honda Accord Service Manual the torque specs are: 74 N.m (7.5 kgf.m. 54 Ibf.ft)
Engine will overheat. Possibly seizing the pistons and totally wrecking the engine.
If the rotor of the 2001 Honda Accord will does not have mounting hardware it is pressed on. To remove these types of rotors the caliper will have to be unmounted. The rotor will then come off.
Because the Accord 1991 has an interference engine, the pistons will hit the valves and either bend them or break them or both if the timing belt breaks.