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You will have to use a c-clamp or brake piston compressing tool to get that piston back in, while you have the brake master cylinder fluid reservoir cap off.
YOU NEED TO SAFELY RAISE SUPPORT REAR OF VECHICLE ON JACKSTANDS. MAKE SURE VECHICLE PARKED ON SOLID LEVEL GROUND. YOU NEED TO SIPHON JUST A LITTLE BRAKE FLUID OUT OF THE MASTERCYLINDER.BECAUSE YOU NEED TO USE LARGE C - CLAMP TO COMPRESS FORCE PISTONS BACK IN THE CALIPER BORES USING LARGE C - CLAMP DOING THIS WILL ALLOW YOU ENOUGH ROOM INSTALL NEW REAR BRAKE PADS.TO REMOVE REAR PADS ONCE YOU COMPRESS PISTON BACK IN THE CYLINDER BORE. YOU CAN TO REMOVE REAR BRAKE PADS BY REMOVING RETAINING PINS IF EQUIPPED OR BRAKE PADS HELD IN PLACE BY RETAINING BOLTS.ONCE YOU HAVE NEW REAR BRAKE PADS INSTALLED.PLACE MASTERCYLINDER COVER BACK ON TOP OF MASTERCYLINDER THEN PUMP BRAKE PEDAL TO SEAT NEW REAR BRAKE PADS AGAINST THE ROTOR UNTIL BRAKE PEDAL FEEL FIRM AND SOLID.THEN RECHECK BRAKE FLUID LEVEL IN BRAKE MASTERCYLINDER ADD LITTLE MORE FLUID IF NEED DONT OVER FILL MASTERCYLINDER.
you will want to use a C-clamp for this. Take the c-clamp and an old brake pad, put the pad against the piston and the non-mobile end of the c-clamp on the back of the caliper. Turn the moving portion of the C-clamp in until it pushes the pad into the piston, and pushes the piston completely into the caliper. I hope this helps.
the pistons on the rear brake calipers on many modern cars screw in and out unlike the front caliper pistons that just slide in and out.This is due to the handbrake using the rear calipers for handbrake operation. A special tool is normally required that screws the pistons back in so that you can fit the new pads. On many cars one side will be a left hand thread and the other a right hand thread. Some cars will be the same thread. These rear pistons will not just push in. Good luck.
YOU NEED A PISTON COMPRESS TOOL TO PRESS PISTON BACK IN THE BORE WITH THE BLEEDER SCREW OPEN ON THE CALIPER*.CLOSE BLEEDER SCREW JUST BEFORE THE CALIPER PISTON IS PUSHED FULLY INTO CALIPER.THIS WILL ALLOW ROOM FOR NEW BRAKE PADS AND CALIPER FIT OVER THE BRAKE ROTOR.WHEN FINISH.PUTTING BRAKE PADS ON YOU HAVE TO BLEED BRAKE SYSTEM.DONT DRIVE VECHICLE IF YOU CANT GET A GOOD FIRM BRAKES.
Renault trafic brake calipers on the front can be pushed in with a G-clamp, but rear calipers need to be wound in, if you look at the piston it has notches for a winding tool!
The rear calipers on these models require a special tool that compresses and turns the piston in at the same time -- most parts stores carry this tool. It is called a caliper piston press -- and it installs where the pads would go and acts like a c-clamp,when turning handle it will turn the caliper piston backinto the caliper as it compresses it. Anytime the brake rotor or brake pads are being replaced, the rear caliper piston must be seated (bottomed) to compensate for the new brake rotor or lining. Because the Parking Brake self-adjuster mechanism is attached to the piston, a special seating method is required. The only acceptable method is by rotating the piston back into the bore using Retractor,MILLER Special Tool 8807, . Any other seating method will damage the self-adjuster mechanism. Good luck and hope this helps.
YOU NEED TO REMOVE THE REAR WHEELS.REMOVE PARKING BRAKE CABLE CLIP FROM CALIPER DISCONNECT PARKING BRAKE CABLE.HOLD THE GUIDE PIN WITH A BACK UP WRENCH AND REMOVE UPPER MOUNTING BOLT FROM THE BRAKE CALIPER.SWING THE CALIPER DOWNWARD AND REMOVE THE BRAKE PADS.TO INSTALL NEW PADS.YOU HAVE TO RETRACT PISTON INTO THE HOUSING BY ROTATING THE PISTON CLOCKWISE.PUT EVERYTHING BACK VISA VERSA.
Jack up car, remove wheel. There are two bolts that hold the caliper on. Remove these. Caliper comes off, take old pads out. There is a special tool to compress the piston back into the caliper (do not use a C Clamp on the rears.) Put new pads back on, re-install the caliper, and put the wheel back on. Pump the brake pedal until it is firm. Done.
Use a caliper wind back tool which rotates the piston at the same time as pushing it back. Release the bleed screw to assist the wind back. If you use a brake hose clamp on the brake hose this will reduce the need to bleed the system.
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