2005 Toyota Sienna Front Brake Question

YOU NEED A PISTON COMPRESS TOOL TO PRESS PISTON BACK IN THE BORE WITH THE BLEEDER SCREW OPEN ON THE CALIPER*.CLOSE BLEEDER SCREW JUST BEFORE THE CALIPER PISTON IS PUSHED FULLY INTO CALIPER.THIS WILL ALLOW ROOM FOR NEW BRAKE PADS AND CALIPER FIT OVER THE BRAKE ROTOR.WHEN FINISH.PUTTING BRAKE PADS ON YOU HAVE TO BLEED BRAKE SYSTEM.DONT DRIVE VECHICLE IF YOU CANT GET A GOOD FIRM BRAKES.

No, see procedure below listed at autozone.com. Try opening bleeder. You may have a kink somewhere or hose decomposing internally. Else the piston is locked in place. Was the brake working before replacing pads?

1. Remove 1 / 2 of the volume of brake fluid from the master cylinder to prevent overflow when the caliper piston is compressed.
2. Raise and safely support the vehicle.
3. Remove the wheel and tire assemblies.
4. Remove the brake caliper without disconnecting the brake line. Support the caliper with a length of wire. Do not let the caliper hang from the brake hose.
   NOTE On some disc brake systems it is not necessary to remove the caliper when installing new brake pads. Remove the lower slide bolt and rotate the caliper upward to remove the pads.
   
5. Remove the brake pads and shims. Inspect the brake rotor and machine or replace as necessary. Check the minimum thickness (specification is cast into the rotor) before machining.

To install:

1. Use a suitable tool to push the caliper piston into its bore.
2. Apply a thin coat of grease to the rear face of the brake pad and install the shim. Install the brake pads.
3. Install the calipers. Lubricate the caliper bolts and boots. If equipped with a 4-cylinder engine, tighten the caliper mounting bolts to 24 ft. lbs. (33 Nm). If equipped with a 6-cylinder engine, tighten the caliper mounting bolts to 54 ft. lbs. (74 Nm).
4. Install the wheel and tire assemblies and lower the vehicle.
5. Apply the brakes several times to seat the pads before moving the vehicle. Check the fluid in the master cylinder and add as necessary.

Brake Pads Removal & Installation Front To Remove:

1. Remove the front wheels. Front brake caliper (exploded view)
   
   
2. Loosen the caliper bleeder.
3. Hold the slide pin; remove the 2 mounting bolts and remove the brake caliper from the support.
4. Support the caliper.
5. Open the brake bleeder. Press the caliper piston into the bore.
6. Close the bleeder after the piston has reached the bottom of the caliper bore.
7. Remove the brake pads, support plates, wear indicators and anti squeal shims.
8. Remove the slide pins and bushings from the caliper support.

To Install:

1. Lubricate the slide pins and bushings with brake grease.
2. Install the bushing on the slide pin.
3. Install the slide pin on the caliper support.
4. Install the brake pad support plates on the caliper supports.
5. Lubricate the anti squeal shims with brake grease.
6. Install the anti squeal shims on the brake pads.
7. Install the pad wear indicator facing upward and install the pads on the caliper support.
8. Install the caliper on the support.
9. Install the 2 mounting bolts, hold the slide pins and tighten 25 ft-lb (34 Nm).
10. Fill the reservoir and bleed the brakes.
11. Install the front wheels.

Rear To Remove:

1. Remove the rear wheels.
2. Loosen the caliper bleeder. Rear brake caliper (exploded view)
   
   
3. Hold the slide pin; remove the 2 mounting bolts and rear brake caliper assembly from the support.
4. Support the caliper.
5. Open the brake bleeder. Press the caliper piston into the bore.
6. Close the bleeder after the piston has reached the bottom of the caliper bore.
7. Remove the brake pads, support plates, and anti squeal shims.
8. Remove the slide pins from the caliper support.

To Install:

1. Lubricate the slide pins with brake grease.
2. Install the slide pin on the caliper support.
3. Install the brake pad support plates on the caliper supports.
4. Lubricate the anti squeal shims with brake grease.
5. Install the anti squeal shims on the brake pads.
6. Install the rear pads on the caliper support.
7. Install the rear caliper on the support.
8. Install the 2 mounting bolts, hold the slide pins and tighten 25 ft-lb (34 Nm).
9. Fill the reservoir and bleed the brakes.
10. Install the front wheels.

If you have disk brakes, and you cannot fit the new brake pads in the callipers? Loosen the brake fluid reservoir cap to allow pressure to escape. Use a large C clamp connecting it to the front and back of the piston. Turn the screw on the clamp to compress the brake piston then release the clamp. The piston will remain compressed allowing you the fit the housing over the new brake pads.

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.

You are not suppose to open the bleeders when replacing the brake pads.After pad removal you compress the pistons into the calipers and install new pads after cleaning and lubing the slides.Then just pump the pedal til it comes back up.Usually takes about 3 or 4 pumps.Make sure you didn`t break a brake line.If there were any problems with the anti lock brakes the light would come on.Hope this helps.Let me know.Good luck.

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

Special tool is a 1" cube with tabs on each side that fits into indentations on the brake piston and can be purchased for $10-12 @ most discount parts stores. Use 3/8" ratchet with short extension and 'special tool to carefully turn piston onto internal hand brake screw. Take care to not tear dust boot. When piston is fully collapsed, make sure to align piston indentations perpendicular to brake pad as there are bumps on pad that fit into them. Also while screwing in piston either remove about 2/3 of brake fluid in master cylinder and refil afterwords or open the bleeder valve on brake piston assembly. Bleed if necessary.

It sounds like the piston is not compressed all the way. When compressing the piston did you open the bleeder valve? If you just let the fluid back up into the system, it may retain enough pressure to push it slightly back out. It could also contaminate the antilock system.

you should be able to compress the piston in the caliper with ease but a word of caution. you should open the bleedr screw when compressing the piston because of your ABS system. you could run into problems with the abs if you don't open the bleeder. if you are haveing problems compressing the piston with the bleeder screw closed you may have a siezed caliper or collapsed brake line. if you still can't push the piston in with the bleeder screw open you have a siezed caliper.