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if it is the caliper at the rear u need the special tool to turn the piston clockwise to push in and counterclockwise to pull out
You will need to push the caliper piston back as well as rotated when you are replacing your rear brake pads. The caliper will need to be turned clockwise.
that depends if it is front or rear calipers
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
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.
Yes, you need to remove the caliper first, then use the old brake pad and a C clamp to push down the piston of the caliper.
The rear piston has to be turned in, it won't just push in, they make a tool at the parts store that makes it easier, if you have tried turning it in and it won't go you will have to replace the caliper as it's bad.
YesYes
They need to be wound back in, using a special tool, a G-clamp also work to push it back, with the rotating part on the caliper piston.
On a 1998 Passat, if you push the piston on the rear caliper in without turning it the caliper is destroyed. You need to buy a special tool to turn the caliper as it is being pushed in. There are some persons on EBAY selling universal brake caliper piston pushing tools on EBAY. If you just push it in, it will not automatically readjust the brakes. You will have very hot rear rotors from the constant rubbing.
Use Lots of PB Blaster and try to push it or pull it out.
When you push the plunger of a syringe down into a marshmallow, it puffs up with air. When you pull the plunger of the syringe up while it is in the marshmallow, it will shrink.