I bought new rear brake pads for my car. removed old pads and placed new ones in caliper would not go over new pads. does caliper move out of postions when opened?

 

Typically old pads are thinner then the new ones due to wear.

As a pad wears the piston forcing the pad against the rotor moves forward.

When you attempt to replace the old worn pad with a new, thicker one, the piston (now extended) prevents the pad from being installed.

The piston needs to be pushed back to make room for the new, thicker pad.

If you have ABS, the best route is to loosen the bleeder on the caliper to relieve fluid pressure when pushing back the piston. This will prevent the fluid from backing up into the ABS control system and possible causing operational issues.

 

I did compress caliper in still cant get caliper over new pads. Does caliper move out of postion when this is done. Plenty of room for inside pad not engough clearance for outside pad. should i remove top bolt of caliper?

 

Yes, the caliper floats on pins at the top and bottom to adjust to pad wear, etc.

Take both pins out, this should solve your problem.

Grease the pins with a lithium grease before reinstalling.

 

You may think you moved the piston all the way in but if its just a little out you won't get the caliper back on. It has to go over if you have it in all the way.

 

Did you use a C clamp to compress the caliper piston?

Place an old brake pad over the piston and attach the c clamp.

You can compress it as far back as the rubber boot.

 

, does it work?

 

I think it does work. Any update on this?

 

If you are talking about the bleeder bolt on top, I would not undo that. You should be able to press in the piston enough without opening that up. Also, if you do open it up, be sure to know how to bleed brakes as that will induce air into the lines.

 

thanks for all the information guys