Want this question answered?
The brake caliper boot seal keeps out dust and dirt. If not replaced it can cause the caliper seal to leak and the brakes to possibly fail. It is simple to replace.
You have to have a air compressor to do it. Take an air gun and insert it in the hole on the caliper were the brake line goes to it. Then take the piston in one hand and start it in the caliper while you are blowing air into it and the air will push the rubber boot out around the piston as you push the piston in. It is alittle trickey, But that's how you do it.
If it has come out completely, lubricate the disc brake piston and the piston bore (in the caliper) with clean brake fluid. Make sure the dust boot is clean and is seated in the caliper. Using a turning motion (back & forth), roll the lip of the dust boot over the piston and push the piston into the caliper by hand as far as you can go. You'll need a c-clamp and a block of wood (or an old brake pad) so that you can push the piston all the way into the bore. Go slowly as you are pushing and keep an eye on the piston so that it goes in straight with no resistance. You don't want to damage the sides of the piston. If the piston goes to the bottom with no problem, seat the dust boot lip into the piston groove. You'll have to bleed the brakes once the pads are in and the caliper is reinstalled.
undo the lock nut located on the rack keep undoing it till the rack is entire out of the caliper. cut off the ties on the boot, slide boot off and put new one on, then screw rack back in to the caliper tighten lock nut then refill powersteering fluid if neccesary. make sure you tie the boot up right and tight. undo the lock nut located on the rack keep undoing it till the rack is entire out of the caliper. cut off the ties on the boot, slide boot off and put new one on, then screw rack back in to the caliper tighten lock nut then refill powersteering fluid if neccesary. make sure you tie the boot up right and tight.
Disc Brake Parts consist of the following: Inner Shim B Inner Shim A Wear Indicator Outer Pad Shim Caliper Bracket Pad Retainers Caliper Bracket Pin Boots Piston Piston Boot Brake Pads Piston Seal Pin A Pin B Bushing Brake Hose Sealing Washers Bleed Screw Caliper Body
Remove lug nuts and wheel. Around on the back side of the rotor, remove two caliper pins. Rotate the pad housing out. Pull old pads off. Use one of the old pads to compress the caliper so new brake pads will fit. Slide new brake pads in housing. Rotate back onto rotor. Grease caliper pins. Put the caliper pins back in rubber boot. Attach housing back to rotor. Then put the wheel back on. Check brake fluid and workbrake pedal a few times before putting car in gear.
Carefully take the boot out of the caliper with a small screwdriver being careful of the seal underneath. Then put the cylinder back in the boot and replace the whole thing back in the caliper.
The brake fluid reservoir is behind the spare tire in the trunk...that would be the boot if you are a Brit. The trunk is in the front in case you hadn't noticed the motor was in the back.
Front Brake Pad Removal and Replacement: 1. Loosen the front lug nuts slightly. Raise the front of the vehicle, and make sure it is securely supported. Remove the front wheels. 2. Remove the brake hose mounting bolt from the knuckle. 3. Hold the caliper pin with a wrench, being careful not to damage the pin boot. Remove the caliper bolt with another wrench. 4. Pivot the caliper up out of the way. Check the hoses and pin boots for damage and deterioration. 5. Remove the pad shims, pad retainers, and pads. 6. Clean the caliper thoroughly; remove any rust, and check for grooves and cracks. 7. Check the brake disc for damage and cracks. 8. Install the pad retainers. 9. Install the brake pads and pad shims correctly. 10.Install the pad with the wear indicator on the inside. NOTE: Check the brake fluid level, the brake fluid may overflow the reservoir if too full. 11. Push in the piston so that the caliper will fit over the pads. 12. Pivot the caliper down into position. Hold the caliper pin with a wrench, being careful not to damage the pin boot. Install the caliper bolt with another wrench, and torque it to proper specification. 13. Install the brake hose onto the knuckle. 14. Press the brake pedal several times to make sure the brakes work, then test-drive. NOTE: Engagement of the brake may require a greater pedal stroke immediately after the brake pads have been replaced as a set. Several applications of the brake pedal will restore the normal pedal stroke. 15. After installation, check for leaks at hose and line joints or connections, and retighten if necessary.
I'm assuming front disc brakes here... Start out by setting the emergency brake on the vehicle. Place something behind the rear tires (bricks are nice) and then jack the vehicle up and remove the front wheels. Once you do this, you'll see the rotor and the brake caliper. The brake pads are located inside the brake caliper, one on each side of the rotor. If you've never done this before and have no idea what a rotor is or what a caliper is, the rotor is the shiny (hopefully smooth) round part that your wheel mounts to and the caliper is the large assembly mounted to the rear (towards the passenger cabin) of the rotor. On the inside of the caliper, facing the shock absorbers are two bolts (or pins) which hold the caliper in place. One is located at the top of the caliper and the other at the bottom. Each should be protected by a rubber boot and the bolt itself can be loosened by inserting a 3/8" Allen wrench. If your model does not have this type of bolt with the rubber boot protectors, you will probably get by with a 5/8" wrench or socket. (My '98 Pick-up and my 2000 Tahoe both have the Allen wrench/boot type bolts, so I'm assuming a 1999 Tahoe will as well) Loosen the bolts and remove the caliper from the mount points. The brake fluid hose screws into the top of the caliper. Do NOT remove this, it is not necessary to replace the brake pads. Also, the caliper is pretty heavy - don't let it hang by the brake hose. If you need to suspend it for any reason, do so from the strut using an old clothes hanger or some other comparable wire you have lying around. Once the caliper is removed, you can remove the old brake pads easily. The outside brake pad is held in place by a clip on each side. Push each upper corner of the old brake pad in towards the center of the caliper and up and the pad will slide loose. The inside caliper is held in place by a a spring clip that fits inside the caliper piston. Simply pull the old pad straight out, rocking it back and forth if necessary. Before placing the new brake pads into the caliper, you'll need to compress the caliper piston to create enough clearance for the new pads to fit over the rotor. Do this using a large C-clamp. Once the piston is compressed back into the caliper, insert the new brake pads. Replace the caliper back onto the mount points behind the rotor and tighten the bolts to hold it securely in place. Repeat this for the other side of the vehicle. Replace the wheels and lower the vehicle back to the ground. Start the engine, pump your brakes to reseat the new brake pads snugly against the rotors and check your brake fluid level, adding fluid if necessary. Finito. Note: If your old pads were extremely worn, resulting in damage to your rotors, you should replace the rotors along with the brake pads. I've included a how to video for you that should help out a great deal. Hope this helps.
you need a tool for turning it...you can get this at any autoparts store. also, get an extension for your ratchet. pushing and turning clockwise will back the piston into the boot so you can fit your new pads into the caliper. it's difficult to push because you're essentially pushing all of the brake fluid back into the system.
Use compressed air with a shop towel as a cushion to blow the piston out. Inspect for pits and excessive corrosion, replace components if needed. Remove the brake bleeder and clean the port so fluid will pass through when bleeding the brakes. Remove the dust boot and seal. Use emery paper or a hone to clean the bore and piston. Clean thoroughly with brake cleaner and dry with compressed air. Install the new seal and coat it with brake fluid. Install the dust boot and piston (this part takes some practice) and re-install on car. Bleed system and check for leaks prior to test driving.