I am changing the rear brake pads on my 2005 mercury montego. I cannot get the caliper to compress using a c-clamp. Is there something special I need to do or know on this car to get the caliper to compress?
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I presume your asking HOW to push the brake piston back into the caliper , the rear caliper piston needs to be turned as it is pushed to get it to go back , a tool for this is readily available , without this tool you will struggle
YOU NEED TO REMOVE 2/3 BRAKE FLUID FROM MASTER CYLINDER.THEN YOU WILL NEED A LARGE C -CLAMP.OPEN C - CLAMP PLACE C - CLAMP OVER TOP BRAKE CALIPER AND AGAINST THE BACK OF THE OUTBOARD BRAKE PAD. THEN TIGHTEN THE C -CLAMP UNTIL THE CALIPER PISTON IS PUSHED INTO THE CALIPER BORE JUST ENOUGH TO SLIDE CALIPER OFF THE ROTOR.WARNING WHEN FINISHING BRAKE JOB.PLACE COVER BACK ON MASTER CYLINDER.TAKE FOOT PUMP BRAKE PEDAL UNTIL YOU GET SOLID BRAKES.THIS SEATS BRAKE SHOES AGAINST THE ROTOR.THEN RECHECK BRAKE FLUID LEVEL IN MASTER CYLINDER.
are you using the right tools? Id call you local auto parts store to make sure the set your using is correct, if it is the right set, id be asking how far out the piston is, on these newer vehicals, if you screw them out to far, almost to the point of being removed, they will not go back in or at least are very tricky to do
use a C clamp to push it in doing it in a slow turning mode. that way you will not spew brake fluid from the master cylinder while compressing the caliper piston. a 6 inch c clamp will be the size to use
no that is only the older rear calipers on gm and others. the fronts do not have that style caliper and sound like the calipers are frozen and may be way your changing the pads. try opening the bleeder screw and then compressing them if they go then you need need brake hoses and if not you need calipers. god luck man
One, take your brake fluid reservoir cap off.
Two, use a thin piece of wood to help you compress the piston on the caliper....do it slow. This way, you don't create a lot of pressure to the reservoir and it won't overflow.
Three, these are the steps to removing and replacing the pads for the rear. It does mention a special tool....but you can use a c-clamp for the same purpose:
Check the brake fluid level in the brake master cylinder reservoir.
If required, remove the fluid until the brake master cylinder reservoir is half full.
CAUTION Care must be taken when servicing rear brake components without disconnecting the parking brake cable from the brake caliper lever.
Remove the disc brake caliper. Support the caliper with mechanic's wire.
CAUTION When the brake pads are separated from the brake caliper, new brake pads must be installed. The brake pads are one-time use only.
Remove and discard the brake pads and spring clips from the brake caliper anchor plate.
NOTE: Do not remove the anchor plate guide pins. The guide pins are press fit to the brake caliper anchor plate. If the guide pins are damaged a new anchor plate must be installed.
Inspect the brake caliper anchor plate assembly.
Check the guide pins and boots for binding or damage.
Install a new brake caliper anchor plate if it is worn or damaged.
To Install: NOTE: The left caliper piston turns clockwise and the right caliper piston turns counterclockwise.
Using the special tool, turn and compress the brake caliper piston into the cylinder.
Clean the residual adhesive from the brake caliper fingers and pistons using the specified brake parts cleaner.
CAUTION Do not allow grease, oil, brake fluid or other contaminants to contact the brake pad or caliper mating surface. Do not install contaminated pads. NOTE: Install all the new hardware supplied with brake pad kit.
Install the new spring clips and brake pads.
Position the brake caliper and install the 2 bolts. Tighten caliper bolts to 23 ft-lbs (31 Nm).
If necessary, fill the brake master cylinder reservoir with clean brake fluid.
With the engine running, apply pressure on the brake pedal to seat the brake pads.