CR Brake Service Directive 11-27-23
Basic Rules:
- -Always utilize brake pad silencer pucks and or plates-isolators
- -Always replace all axle specific brake pad sensors
- -Follow CR choice of specific brands of brake rotors-discs
- -Pay full attention and triple check all fasteners as necessary
- -Never utilize air tools on wheel lug nuts, especially Porsche Aluminum nuts
- -Utilize special deep or aluminum socket on Porsche 911 Aluminum lug nuts
- -Always replace both the pads and rotors (discs) together
- -Always utilize only genuine manufacturer brake pads
- -Always replace all brake components on single axle
- -If you cannot obtain or utilize the brake pad pucks or silencer-isolator plates; spray Permatex “Disc Brake Quiet” on the back of the brake pad backing plates
Brake Pad Service:
- Note any damage to any wheels or damage on or inside the car.
- Test drive car, document any pre-existing conditions; note any pulling, brake pedal feel and stopping performance.
- Check to see if the brake calipers are dragging, stop on the top of a speed bump, push the brake pedal hard and see if car still easily rolls when lifting off brake pedal, also check by spinning the wheels while the car is on the lift.
- Pull car into shop bay.
- Mark wheels are on hubs with a crayon to ensure the same installation position (note where wheel lock is positioned).
- If the car has air springs-suspension, disable system before lifting car.
- Utilize a fender protection cover.
- Remove brake fluid reservoir cap, remove brake fluid as necessary to make room for new brake pad material.
- Cover brake fluid reservoir with paper towel. Please be careful, brake fluid will damage painted surfaces.
- On a PCCB (carbon ceramic brake) equipped cars, utilize the genuine wheel guide-post tool.
- Try to coat all friction compound faces of the brake pads with BG “Stop Squeal” liquid.
- Bevel the edges of the brake pad friction compound surfaces with a rough file, chamfer pads at a 45-degree angle.
- Clean out brake pad seating surfaces in calipers, wash all with brake parts cleaner, but please be careful of painted brake calipers; be very cautious with this because if the calipers have been poorly refinished it can damage the finish or decals, it is usually pretty easy to tell ahead of time if you are going to run into any issues.
- Lubricate the brake pad seating surface with anti-seize, check/clean/lubricate slide pins on floating calipers.
- Adjusting tapered wheel bearings if approved (bearing grease age?).
- Replace brake pads and rotors (discs) and wear sensors.
- Look-up factory or manufacturers recommendations torque specifications.
- Replace any missing rubber bleeder caps if approved.
- Torque all fasteners as recommended and or directed in the manufacturer WM (Workshop Manual).
- Replace caliper bolts on cars where the WM specifies. Most BMWs do not request replacement unless the bolts come coated with blue micro encapsulated thread locker already applied.
- Clean and lubricate the hub-centric wheel hub surface with the specific tool and anti-seize.
- Pump the brake pedal.
- Correct brake fluid reservoir fluid level-reinstall cap.
- Reinstall wheels, torque to factory specification per WM.
- On Porsche’s perform the “grinding-in procedure for EPB (Electronic Parking Brake) shoes. PLEASE NOTE: Before changing the EPB air gap, consult shop foreman.