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Re: replace rear brake pads on a 2000 grand marquis
They probably make some high dollar tool for this, but all you really need to do is to take the cap off the master cylinder, take one of the old brake pads and set it against the cylinder part of the caliper, and use a large c clamp pushing against the pad while hooked to the back of the caliper to squeeze the cylinder back in. Hope this helps.
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A special tool is required to compress the caliper piston on the rear brakes-don't use a C-clamp on the piston. Raise the vehicle and remove the tire. The rear calipers have only one guide pin. Remove this pin and raise the caliper. Remove the old brake pads. Using the special tool compress the caliper piston-the piston will have one or two slots on it. These slots must in the correct position to remount the caliper. Install the new brake pads and slide the caliper back over the rotor and replace the guide pin. If the caliper doesn't slide over the rotor you'll need to reset the slots on the piston. Replace the tires and you're ready to go.
Did you try opening the bleeder screw on the caliper it self. If you still can't compress the piston back into the caliper after opening the bleeder screw you may have a caliper that is locking or locked up. Sometimes a big pair of channel locks and a lot of muscle can compress the caliper again. If not you may need to replace the calipers. Make sure to ask for rebuilt verses new. there is a huge price difference.
There's a special tool required to compress the rear caliper pistons. You may want to rent the tool. If you look at the piston you'll see one or two notches. The special tool has nipples to fit these notches. The caliper piston will have to be compressed with the tool and the notches will have to be placed in the o'clock and 6 o'clock for the brake pads to slide over the rotor. If you rent the special tool have the renter show you how to use it.
The rear calipers on these models require a special tool that compresses and turns the piston in at the same time -- most parts stores carry this tool. It is called a caliper piston press -- and it installs where the pads would go and acts like a c-clamp,when turning handle it will turn the caliper piston backinto the caliper as it compresses it. Anytime the brake rotor or brake pads are being replaced, the rear caliper piston must be seated (bottomed) to compensate for the new brake rotor or lining. Because the Parking Brake self-adjuster mechanism is attached to the piston, a special seating method is required. The only acceptable method is by rotating the piston back into the bore using Retractor,MILLER Special Tool 8807, . Any other seating method will damage the self-adjuster mechanism. Good luck and hope this helps.
These cars usually have disk brakes in the back. You need a caliper piston rotator tool, this tool fits into the caliper piston and you must turn it in to retract the piston, it fits onto a 3/8 " drive socket wrench. Npa sell a universal one for like $15.00 - $20.00.
There should be 2 slots in caliper piston,Take needle nose pliers and insert one tip into each slot,will have pliers in open position.spray lube on rubber seal,then twist pliers in clockwise direction.Piston will screw in.You can also buy special tool for this.
You'll need a few special tools. You will need some common metric wrenches and sockets, 10-19mm will be more than enough, and you'll need an 8mm Allen bit as well, to remove the caliper mounting bolts (these anchor the caliper to the caliper carrier). If you're doing rear brakes, you'll also need the proper tools to screw the calipers back in. If you're doing front brakes, you can use a C-clamp to compress the pistons back in. Other than that, and maybe a big beefy screwdriver to separate the caliper from the carrier, there's nothing to it.