I changed the left rear brake caliper on my 88 formula and everything went fine. So I went to replace the right side brake pads and when I tried to put it back together I couldn't push the piston in. The piston pushes out fine but I can't get it back in. No amount of clamping or squeezing will push it in. I even opened the bleeder screw to relieve the pressure in the caliper (don't worry I pinched off the brake line) and it didn't help. It squeezed a minimal amount of fluid out. No issues bleeding the caliper either. But I just don't get why it won't go back in when it was fine before I replaced the other caliper.

Then I noticed a small tear in the seal around the piston so I'm just going to replace it anyway but I wan't to know what went wrong. Why did it appear to seize at the same time I replaced the other caliper?

Slider pins are stuck too.

[This message has been edited by RilesOfSmiles (edited 11-02-2013).]

Did you screw in the parking brake? It's self adjusting and so needs to be returned to it's screwed in position when replacing pads.

Edit: Check out Ogre's Cave for parking brake adjustment

[This message has been edited by Neils88 (edited 11-02-2013).]

one side goes one way and the other side goes the other way.

Clamp method need P brake level REMOVED from caliper.

Bad/rebuilt piston can stop retracting the piston.
see https://www.fiero.nl/forum/F.../HTML/130470.html#p4

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(Jurassic Park)

The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)