with a c clamp. put a block of wood or your old pad over the piston and tighten with clamp.
The piston in the rear caliper on the 2008 Grand Caravan is the "screw in" type. A special tool is required to do the job.
there is a special tool that can be purchased at any auto parts store made specifically for compressing brake caliper pistons. I personally use a 4 inch c-clamp. works every time.
You don't remove the piston, you just compress it. Loosen the cap on the master cylinder and then compress the piston all the way in. You can then remove the old pad and install a new one.
with a tool that looks like a cube and you attach to a ratchet
I have used a large "C" clamp, to compress the caliper flush to the face.
Caliper front? Use a "C" Clamp Caliper rear? Threaded Need a special tool available at Sears or auto parts (Not expensive)
caliper piston does not retract with moderate C-clamp pressure - not willing to force it
If the emergency brake is on the calipers, you need a special tool to compress the caliper. This should be rentable from the parts store.
Replace the caliper and bleed the brake system.
Remove wheel, remove the two bolts in the calipers, pull up calipers, remove pads compress caliper piston with a c-clamp, be sure to have the brake fluid cap off the reservoir under the hood. - replace pads and reverse the order.
If parking brake uses these calipers - they are threaded special tool (not expensive) is required, availlable at Sears or auto parts to thread piston fully into caliper body
There is a tool used to twist the piston back into the caliper I bought mine from Canadian Tire.
Use a screwdriver between caliper and front of piston to squeeze piston back, remove caliper via two bolts on rear inside of caliper. Slide caliper away from rotor and support to ensure you don't damage the hyd. hose. Remove pads from caliper, fit new ones same way. re-fit caliper.
cheap caliper compressor from auto parts store, 1 size fits all.
Make sure the cap is off of the brake master cylinder. You can use a tool designed to move the caliper or a c-clamp. If the piston is too far out it may not go back into the caliper.
Remove wheels Re-install 2 lug nuts to hold rotor in place Remove 2 caliper mounting bolts Slide caliper off rotor Use a "C" Clamp to fully compress piston into caliper body Remove and replace inner and outer pads Re-install caliper PUMP BRAKE PEDAL TO SET PADS AGAINST ROTOR PRIOR TO MOVING VEHICLE
Screw the piston puck in clockwise. There is a tool for this (KN or KY) that is a box with little dowel pins to fit the slots in the caliper piston. What you are actually doing is resetting the parking brake. As the pads wear and you set the parking brake, each actuation of the parking brake foot lever ratchets the piston outward to componsate for pad wear.
Whoever replaced your pads may have neglected to apply anti squeal goop to the back of the new brake pads. Brake pads should have some greasy stuff smeared on their surfaces where they meet the caliper, the caliper piston, and at the ends where they fit into the caliper. The squeal is caused by high frequency vibration where the back of the pad presses against the caliper and caliper piston(s).
Remove wheels Re-install 2 lug nuts to hold rotor in place Remove caliper mounting bolts Slide caliper off rotor Use a "C" clamp to fully retract piston into caliper body Replace inner and outer pads Re-install caliper PUMP BRAKE PEDAL TO SET PADS AGAINST ROTOR PRIOR TO MOVING VEHICLE
Rear calipers are threaded and have to be "screwed" (because parking brake uses rear calipers) Tool available at Sears or auto parts--not expensive Get a 4 inch C clamp, put the old brake shoe back in place on the piston side and screw down the C clamp. This should do it. If not open the bleeder on this caliper & it will then go in. Be sure to Bleed The Brakes on the rear after this. cartalk says: Nix on the C clamp, as the Piston needs to be turned to go back in(self-adjuster) clamping will destroy parts... good luck dave Answer (12/19/08) Dave is right on... I just changed my rear brake pads on my '04 Grand Prix. The caliper piston face has a pattern on it that lines up with a "pin" on the back side brake pad. I bought a tool for $15 from O'Reilly AutoParts that is a "universal" tool that has he "pin" pattern to fit several car makes & models. The piston turned back into the caliper VERY easily. Just be sure to line up the piston face like it was when you first started so it will line up with the back side brake pad "pin". Mike
Remove wheels Re-install 2 lug nuts to hold rotor in place Remove caliper mounting bolts Slide caliper off rotor Use a "C" clamp to fully retract piston into caliper body Install new inner and outer pads Re-install caliper PUMP BRAKE PEDAL TO SET PADS AGAINST ROTOR PRIOR TO MOVING VEHICLE
Remove wheels Re-install 2 lug nuts to hold rotor in place Remove 2 caliper mounting bolts Slide caliper off rotor Fully retract piston into caliper body using a "C" clamp Replace inner and outer pads Re-install caliper on to rotor PUMP BRAKE PEDAL TO SET PADS AGAINST ROTOR PRIOR TO MOVING VEHICLE