Chances are when a brake caliper wont compress it is the type that must be turned and compressed at the same time and requires a special tool that you can borrow from a local chain auto parts like Auto Zone. That was the case on my 96 Buick Riveria rear disk brakes. Hope this helps.
Replace the caliper and bleed the brake system.
I have used a large "C" clamp, to compress the caliper flush to the face.
You will need a caliper rewinding tool
How do you compress the rear brake caliper pistons to install new pads on vw polo 08 model?Read more: How_do_you_compress_the_rear_brake_caliper_pistons_to_install_new_pads_on_vw_polo_08_model
It requires a special tool to turn and compress the piston in at the same time.
To compress the pistons on a Volvo rear disc brake, first, remove the wheel and access the brake caliper. Use a specialized brake caliper tool or a C-clamp to gently push the piston back into the caliper housing. If the caliper has an integrated parking brake, you may need to rotate the piston while pushing it in, so ensure to follow the specific procedure for your Volvo model. Once compressed, you can reinstall the caliper and wheel.
some model's that have the parking brake Incorporated into the rear caliper, you must compress and turn the piston until the proper clearance is obtained.
Yes.
No need to rotate the front caliper pistons as you compress the front calipers. That process is only for the rear calipers because of the parking brake mechanism.
It turns. There is a special tool for it. You may damage the caliper by pushing straight in.
Loosen something on the brake if you tighten it will get worse screw caliper piston in or out with caliper tool. they are like that for the park brake function
If the emergency brake is not connected to the caliper use a "c" Clamp If the emergency brake is connected to that caliper a special tool (not expensive available at Sears or auto parts) is needed Caliper is threaded. Turn Clockwise to compress