When you are changing disc brake pads, you should use one of the old pads and a large clamp to compress the piston immediately after removing the caliper. This helps to prevent air from entering the brake lines.
Use caution when positioning the clamp so that it does not put any pressure on the brake hose, bleeder valve, or anything other than the piston housing.
If the piston is difficult to compress, you may have a frozen caliper and/or a leaky brake hose.
THERE ARE TWO BOLTS ON EACH SIDE OF THE CALIPER REMOVE THOSE AND PULL THE CALIPER OFF
you have to unbolt the caliper off the rotor, but not from the brake fluid line.
Changing the caliper is an extension to the changing the brakes procedure.The 'extension' is to disconnect the brake line/hose from the caliper.Next extra step is to bleed the brakes - since the new caliper is going to be full of air when you first hook it up.See "Related Questions" below for more extensive coverage of the procedures...
no you dont have to---BUT its adviseable
Changing brakes is a pretty simple task. Lift the car, remove the tire, brake shoe/caliper and remove the old pad. Put in the new pad, replace the brake shoe/caliper, put the tire back on and lower the car.
what is the best way to bleed brakes when installing new caliper on front left wheel
Take a large C clamp put it on the caliper and force it back or get someone with really strong hands to sqeeze in in.
The caliper is one part of the brake system.
Disc brakes at the top of the caliper Drum brakes at the top of the wheel cylinder
Should be disc brakes and not adjustable caliper slides to compensate for lining wear unless caliper slides are frozen
Either with a large pair of water pump pliers or a c-clamp
Frozen brake caliper