Caliper pistons should retract if calipers are in working order. Calipers need to be removed and rebuilt or replaced. A brake fluid flush is highly recommended.
The Brake Piston Cube is a cube-shaped tool used to retract brake caliper pistons in vehicles when changing brake pads. Its design allows it to fit into the caliper housing and apply even pressure to retract the pistons back into the caliper, facilitating easier brake pad replacement. By turning the Brake Piston Cube, the pistons are compressed uniformly without damaging the caliper or seals.
There is a tool used to twist the piston back into the caliper I bought mine from Canadian Tire.
Depending on the make/model/year of vehicle, you may have to get a rear caliper tool. Some rear calipers need to be turned to retract them.
The calipers should turn back in with a big scredriver or such! you have to rotate the piston to retract them rotae the pistons clockwise with a large pair of pliers
To retract the rear caliper on a 2006 Hyundai Tiburon, you'll need a brake caliper tool or a C-clamp. First, remove the caliper from the bracket by unscrewing the bolts. Then, using the tool, rotate the caliper piston clockwise to retract it fully into the caliper housing. Once retracted, you can reinstall the caliper over the new brake pads.
To retract the calipers on the rear brakes of a Jaguar S-Type, you'll need to use a special tool designed for winding back the caliper pistons. Start by removing the wheel and securing the vehicle. Then, insert the tool into the caliper piston and turn it clockwise to retract the piston fully. Ensure that the brake fluid reservoir cap is loosened to allow for fluid displacement during this process.
The caliper piston may not retract properly due to a lack of lubrication, a damaged seal, or air trapped in the brake system.
You need to turn the piston clockwise and it will slowly retract as you turn.
If you do not want to spend any money, then, put the old pads in and use a bar or screw driver to force the pistons back................BUT, in all good sense, just go to your local auto parts and buy a small tool that will do the job for you. It is not expensive, then put the old pads in and put the tool between them, and just turn the screw. It will force the pistons back with no damage. If in the event the pistons are very hard to retract, then I would suggest to replace the calipers. Good luck.
Remove wheels Loosen 2 caliper mounting bolts and remove Remove Rotor (if peel off type) Resecure caliper Remove brake pads Need to get special tool to retract piston into caliper Do not retract using "C" clamp these pistons have to screw back into calpier (Clockwise) After piston retracted totally install new brake pads and reverse procedure to install DO NOT MOVE VEHICLE UNTIL BRAKE IS PUMPED TO RESET PADS TO CALIPER
Caliper pistons may retract too far when brakes are released due to issues like worn brake pads, which can create excessive clearance. Additionally, a malfunctioning master cylinder or brake booster may cause inconsistent hydraulic pressure, leading to improper piston retraction. Air trapped in the brake lines can also affect the system's ability to maintain the correct piston position. Regular maintenance and inspection can help identify and resolve these issues.
Use a "C" clamp to fully retract piston into caliper body