2004 Honda Civic compress rear caliper

Hi ald123,

To return the piston to the caliper housing, you have to turn it clockwise and pressing in slightly with the aid of a special tool. However a long nose plier would work if you use it to grip the slots and twist it in. If that fails, you would have to get the tool from parts store, some do provide loan services. This video will show you how

https://youtu.be/j8YwfSKEzZo

Please run down this guide and report back.