I can't get the piston to go back in in order for it to fit over the new brakes. How do I get it to go back in? I heard that I had to twist it with a screwdriver. How? And once I do get it to go back in, will it automatically adjust or turn for the new brakes when done?
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Re: 2003 Honda Civic Si - Changing rear brake problem
Ford taurus's have the same setup on the rear calipers and it requires a special tool or persistance on your part with a pair of channels lock pliers and a c clamp. turn the piston clockwise as you press it in with a c clamp or get the tool mentioned below.
Harbor Freight has this special tool... found HERE
And yes, once you get the piston in it will come back out on it's own and yes will automatically readjust.
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FIRST REMOVE SMALL AMOUNT OF BRAKE FLUID FROM THE BRAKE MASTERCYLINDER. THEN USE A LARGE C - CLAMP AND LEAVE THE OLD BRAKE PAD IN PLACE ON PISTON SIDE THEN COMPRESS THE PISTON IN CALIPER BORE. IF YOU SEE SIGNS OF BRAKE FLUID LEAKING AROUND PISTON SEAL.THE BRAKE CALIPER NEED REPLACING.WHEN YOU FINISH BRAKE JOB NEW BRAKE SHOES IN PLACE MAKE SURE BRAKE MASTERCYLINDER COVER BACK ON MASTERCYLINER THEN PUMP BRAKE PEDAL UNTIL NEW BRAKE PADS SEAT AGAINST BRAKE ROTOR.CHECK BRAKE FLUID LEVEL IN MASTERCYLINDER MAKE SURE ITS NOT LOW.
There is a caliper expansion tool that you can get at any auto parts store. You should expand the caliper before inserting the new pads. Always expand it until the caliper piston will not go any further. After you get the caliper back on with the new pads, make sure to pump the brake pedal to repressure the caliper. You also should bleed the line afterwards.
Normally rear disk brake pistons have notches on the top of the piston that a tool does fit into (usually a small square shaped tool with protrusions that fit into the notches on the top of the caliper pistons and this tool usually fits onto a 3/8 drive extension and ratchet), and the piston is then rotated down into the caliper, it actually screws into the caliper. You do not want to compress this type of piston or you will damage the caliper and piston.
As your car has a handbrake fitted to the rear calipers,you will need a piston wind in tool to retract the piston fully back into the caliper as when you adjust your handbrake the piston automatically winds itself to the required position for usage without this tool you are getting nowhere,so get hold of a tool to do the job and you should not have problem unless the piston has totally siezed on the screw then you will have a problem being the only way to repair would to be a new or refurbished caliper.
Basically the pistons are held by the dust cover, which grips the piston and the wheel cylinder.If those dust rubbers are still serviceable thn nothing to worry.
Since the pistons show the signs of movement its good as they are not jammed.
Its recommended tht you also overhaul the wheel cylinders.
Hope this helps!
Its ok if they do come out after all you will have to bleed the brakes system
There is a special tool to press the rear brake caliper back in on you vehicle. You can "borrow" it from Auto Zone or Advance Auto Parts. Basically because of the parking brake, you have to press the caliper back in and at the same time screw it in. I know that might sound confussing but when you see the tool they will loan you, it will make sense. It's pretty easy to do with the right tools. I have however taken the hard route before and used a C clamp and pair of needle nose to get it worked out. Hope this helps. Thanks for rating my response and for using FixYa!
The back brakes on my Honda Accord are disc brakes. After removing the brake cylinder assembly you will see the brake cylinder piston end has a slot in it. The short pin on the back side of the inner brake pad fits into this slot, but also it is used to 'Turn' (clock-wise) the piston back into the cylinder so you fit the assembly back over the new 'thicker' pads. You can not 'press' this piston back into the cylinder.
Yes you can,dont forget to open the master cylinder cover as the fluid will go back to the cylinder,just watch out for the sensor near the caliper it looks like a black cable pointing at the back of the rotor,if this helps please vote me a fix ya