Tools Required

J 26267 Piston Seal Installer

1. Remove the caliper. Refer to Brake Caliper Replacement .
2. Drain all the brake fluid from the caliper.

Caution: Do not place your fingers in front of the piston in order to catch or protect the piston while applying compressed air. This could result in serious injury.

Notice: Use just enough air pressure to ease the piston out of the bore. You can damage a blown-out piston even with the padding.

3. Pad the interior of the caliper with clean shop towels.



4. Remove the piston from the caliper bore.



5. Remove the boot from the caliper bore. Do not scratch the housing bore.



6. Remove the piston seal from the caliper bore. Do not use a metal tool.



7. Remove the bleeder valve from the caliper body.
8. Clean the bleeder valve, the caliper bore, the caliper passages and the piston with denatured alcohol. Dry the parts and blow out the brake fluid passages. Use dry and filtered compressed air.
9. Inspect the piston and the caliper for the following conditions:

•	Scoring on the piston surface or in the caliper bore

•	Corrosion on the piston

•	Chrome plating damage on the piston

•	Corrosion in the caliper bore

•	Use crocus cloth in order to polish light corrosion from the caliper bore. Replace the caliper if the corrosion cannot be removed.

•	Pitting in the caliper bore

10. Replace the piston or the caliper if you found any of the above conditions.

1. Lubricate the new piston seal, the caliper bore, and the piston with clean brake fluid.



2. Install the piston seal. Make sure the piston seal is not twisted in the caliper bore groove.



3. Install the boot on the piston.



4. Install the piston in the caliper bore.



5. Install the boot into the caliper housing bore using the J 26267 .




Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

6. Install the bleeder valve in the caliper body.

Tighten
Tighten the bleeder valve to 13 N·m (115 lb in).

Important: Before moving the vehicle, pump the brake pedal until it is firm. Check the brake fluid level in the master cylinder after pumping the brakes.

7. Install the caliper. Refer to Brake Caliper Replacement .