If you do not know how to properly replace brake pads then you should send your truck to a mechanic. Working on your car without proper knowledge could hurt you and the car.
Unlike the front calipers, pistons in the rear usually have to be rotated to compress them.
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
I just did mine. Use a screw driver to press the brake pads away from the rotor and compress the caliper pistons back some so you can remove the caliper off of hte rotor. Losen and remove the bolts to the brake caliper. DO NOT DISCONNECT the brake line from the caliper! Get you a c-clamp and a piece of 1/4 board about 4 inches long. Once you have removed the caliper from the mount and removed the brake pads support the caliper with one hand. Place the wood over the caliper pistons and using the c-clamp place it over the wood and center of both pistons and other side of caliper to compress the pistons back into the caliper. Make sure you DO NOT PINCH the rubber boots on the pistons. Once you have compressed the pistons back into the calipers install your new pads and calipers back on the mounting surface and tighten the bolts back to torque specs.
rear brake pistons are called actuated pistons. And the twist in and out. You will need a special tool to twist them back into the caliper. Unlike the Front Pistons which can be pushed back.
You need a tool mostly used on ford cars that turns the piston while pressing it.
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.
# Preparation For Brake Pad Replacement # Remove the Wheel # Unbolt the Caliper # Remove the Old Brake Pads # Compress the Brake Piston # Re-Install the Brake Caliper
Use a "c" clamp to fully compress piston into caliper body
Clockwise
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
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
AnswerThere is not enough information in your question. A cylinder piston you do not compress, you compress the rings in the piston. There are pistons in the brake system. There is no way of knowing the problem without being more specific.I'm assuming you mean the caliper piston. If it can't be compressed, replace the caliper.