the caliper bolt should be a 13mm and the bracket or "bridge" bolt should be an 18mm or a 21mm
The Rear Caliper Bottom Bolt head size is 12 mm. The Top bolt is enclosed only making it a slide bolt therefore you cant and really have no need to remove it. So the only bolt you should remove is the bottom 12mm head bolt. Then there will be a 14mm bolt that will hold the Emergency Brake Cable Bracket to the Caliper. Loosen this bolt and remove the Emergency Brake Cable Bracket from the Caliper. Then pry the bottom of the caliper up off the disc. This will allow you to swing the caliper up then push the caliper back to slide the caliper off the enclosed bolt slide at the top of the caliper. This will allow access to the inside and outside pads to remove them and allow you to press and rotate the Piston (Push and Twist-in Pistons) back into the Caliper with the right Brake Caliper Compression tool. The rear two Caliper Bracket bolt head sizes are 18mm. You must remove the Caliper bracket in order to remove the rear brake disc. The Front Brake Caliper Bolt is a 3/8" Allen head bolt. There will be two bolts holding the front calipers to the Spindle. The Front calipers are standard push-in Pistons.
To replace brake pads and rotor: Unbolt wheel, unbolt caliper, remove caliper, unbolt caliper bracket, remove rotor, replace rotor, bolt up bracket, compress caliper, replace pads, replace caliper, bolt up caliper, bolt up wheel, repeat whole thing on other side...
Disengage the parking brake before attempting to remove the caliper.
not sure from your question which caliper bolts you mean. the caliper to mounting braket bolt is 63 foot-pounds (these are the two bolts per caliper that you remove to change the pads. They are a pin and pass through a rubber boot). caliper mounting bracket to suspension is 137 foot-pounds (these are the two bolts per bracket that you also remove if you are changing the rotor disk). the factory uses red loctite on them and they are a bear to get out.
14 mm
Remove the front bumper fascia.Unplug the horn electrical connector and remove the bracket bolt.
Remove wheel, remove the bolt holding brake hose to the caliper, remove the two pins that hold the caliper to the caliper bracket using a 3/8" allen wrench, remove caliper. Inspect brake pads and brake hose for damage, replace if necessary. Install new brake caliper in reverse order. Bleed system.
Assuming this is a 4+4 vehicle, the caliper bolts on to the caliper bracket. The caliper bracket bolts on to the steering knuckle.
If memory serves, 18mm. That would be the bracket bolt. The caliper bolt has a 9mm thread.
The caliper mounting bracket, in 99% of vehicles, needs to be unbolted from the axle before it will release the rotor. There are usually only two bolts holding it. Sometimes you can remove the top bolt, loosen the bottom and swing the mounting bracket out of the way. Sometimes you have to take both bolts completely out and dismount the bracket.
1. Remove the brake hose to caliper bolt from the brake caliper. 2. Remove the brake hose from the brake caliper. 3. Remove and discard the 2 copper brake hose gaskets. These gaskets may be stuck to the brake caliper and/or the brake hose end. 4. Cap or plug the opening in the brake caliper and the brake hose to prevent fluid loss and contamination. 5. Remove the 2 brake caliper pin bolts. Remove the park brake cable from the caliper. 6. Remove the brake caliper from the brake caliper bracket.
I believe it's either a 40 or 45.