- Clean the brake master cylinder brake master cylinder reservoir, brake line connections, and reservoir cap.
- Inspect the brake fluid for the following conditions, indicating brake fluid contamination:
- Inspect the master cylinder reservoir cap diaphragm and the reservoir-to-master cylinder grommets for swelling, indicating brake fluid contamination.
- If the brake fluid WAS contaminated with an oil-based or a silicone-based substance, indicated by fluid separation and/or a swollen master cylinder reservoir cap diaphragm and/or swollen reservoir to master cylinder grommets, perform the following:
- If the brake fluid WAS NOT contaminated with an oil-based or a silicone-based substance, but was contaminated with water or dirt, rust, corrosion, and/or brake dust, replace the brake master cylinder reservoir cap diaphragm.
- Place a clean suitable container under the master cylinder.
- Disconnect brake lines (3) from the master cylinder (1), then remove master cylinder reservoir cap (2).
- Allow the master cylinder (1) to drain into the container until empty.
- Install the brake lines (3) to master cylinder (1) and tighten to 15 N·m (11 lb ft).
- Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
- Remove all the wheels. Refer to Tire and Wheel Removal and Installation.
- Loosen the left[dash ]side front brake calliper bleed screw (2).
- Remove the left[dash ]side front brake calliper anchor plate to knuckle retaining bolts (4).
- Detach the brake calliper (1) from the knuckle (3).
- Suspend the brake calliper (1) upside down with heavy mechanics wire or equivalent.
- Remove the bleed screw (2) to drain contents of the brake calliper (1) into suitable receptacle.
- Tighten the bleed screw (2) and reinstall the brake calliper (1) to the knuckle (3).
- Install the NEW brake calliper anchor plate to knuckle retaining bolts (4) and tighten to 60 N·m +120° (44 lb ft +120°).
- Repeat steps 12-18 for the right hand front brake calliper.
- Repeat steps 12-17 for the rear brake calliper assemblies.
- Install the rear brake calliper to knuckle with NEW retaining bolts and tighten to 110 N·m (81 lb ft).
- Bleed brake system. Hydraulic Brake System Bleeding.
- Install the wheels. Refer to Tire and Wheel Removal and Installation.
- Lower the vehicle to the ground.
Warning: Refer to Brake Dust Warning in the Preface section.
Warning: Refer to Brake Fluid Warning in the Preface section.
Warning: Refer to Brake Fluid Irritant Warning in the Preface section.
Caution: Refer to Adding Fluid to the Brake System Caution in the Preface section.
Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution in the Preface section.
| • | Fluid separation indicates 2 types of fluid are present. A substance other than the recommended brake fluid has been introduced into the brake hydraulic system. |
| - | Swirled appearance equals an oil-based substance. |
| - | Layered appearance equals a silicone-based substance. |
| • | Fluid discoloration, indicating the presence of moisture or particles that have been introduced into the brake hydraulic system. |
| - | Cloudy appearance equals moisture. |
| - | Dark appearance/suspended particles in fluid equals dirt, rust, corrosion, and/or brake dust. |
| 4.1. | Remove ALL of the following components listed from the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the contaminated brake fluid in the brake hydraulic system. |
Refer to the procedures indicated:
| 4.2. | Clean out all the hydraulic brake pipes using denatured alcohol, or equivalent. |
| 4.3. | Dry the brake pipes using non-lubricated, filtered air. |
| 4.4. | Replace ALL of the following components listed and install them to the vehicle. Each component contains internal rubber seals/linings which have been contaminated by the contaminated brake fluid in the brake hydraulic system. |
Refer to the procedures indicated:
| • | Replace the brake master cylinder reservoir cap diaphragm. |
Caution: Refer to Fastener Caution in the Preface section.
Warning: Refer to Safety Glasses Warning in the Preface section.
Danger: To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.
Note: Bolts with micro-encapsulated thread sealant must be replaced after removal.
Discard the bolts.
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.
