The simplest way of pressing the brake disk calliper piston back to make space for the new pads is to use a G clamp that will reach inside the calliper unit when the pads are removed. It will neeed to open at least 5cm to fit. The esembly must be free at least at one end. Make sure you also remove the thin cover off the piston befor inserting the clamp. Fit the clamp with the screw end in the now open piston and wind in slowly with the clamp centralised. The piston should then simply slide back stop when resistance is felt.
but if its a gti they screw back which you will need a special tool or like me i used a good set of lockons and turned them back that way.
It requires a special tool to twist the piston back into the caliper.
Remove caliper mounting bolts Slide caliper off rotor Use a "C" clamp to fully retract piston into caliper body If parking brake is used on this caliper piston is threaded and a special tool (not expensive) is required to thread piston into caliper body
The rear brakes you need a 3/8 standard wrench to open two bolts retaining the caliper. The piston caliper requires a special tool to "wind " it or screw it back in order to install the new brake pads. DO NOT PRESS THE CALIPER PISTON BACK. You have to "screw" or rotate it. The rear brakes you need a 3/8 standard wrench to open two bolts retaining the caliper. The piston caliper requires a special tool to "wind " it or screw it back in order to install the new brake pads. DO NOT PRESS THE CALIPER PISTON BACK. You have to "screw" or rotate it.
Use a "c" clamp (front) to slide piston into caliper body Rear piston is threaded and requires a special tool to screw piston into caliper body Tool not expensive and available at Sears or auto parts
be sure to purcahse the tool to "screw" the caliper piston in. If you try to push the piston in on rear disc brakes you will damange the caliper.
It is a tool to reset the piston on rear discs brakes
There is a special tool that one needs to accomplish this task. It turns the piston while pressing the same piston into the caliper body. Try www.germanautoparts.com to purchase same. Do not try to do it without this tool, you will damage the caliper and it will cost you $$$$$ to replace.
The best thing you can do is replace the caliper.
If rear brake caliper is used for emergency brakes also - piston is threaded and requires a special tool (not expensive available at Sears or auto parts) to screw into caliper housing
The piston is forced out of the caliper by the pressure of the brake fluid. This pushes the brake pads against the rotor, in turn stopping the vehicle.
Yes
the caliper needs a special tool. the piston does not push straight in. the spring needs to be released at the rear of the caliper. then using the special tool the piston twists back in to place