463619 Removing and installing front disc brake pads
WM 463619 Removing and installing front disc brake pads
Tools
Information
Note on pictures shown
Information
- The pictures shown in this document may differ from the original.
- However, this does not affect the validity and relevance of the pictures.
Preliminary work
Lift the vehicle.
-> 4X00IN Lifting the vehicle Service and Repair.
Remove the wheel. Use assembly aids (assembly pins) -1-.
-> 44051900 Removing and installing wheel.
Brake disc and caliper
Removing front disc brake pads
NOTICE
Removing/fitting wheels
- Risk of damage to (ceramic) brake discs
-> Use two assembly pins when removing and fitting the wheel.
-> Carefully guide the wheel towards the wheel hub, thereby preventing any heavy impact on the (ceramic) brake disc.
Information
- Do not open the brake system.
- Do not loosen the brake hose from the brake caliper when loosening the brake caliper.
- The core of the warning contact wire must not be left exposed! It does not matter if the insulation is worn.
- If necessary, remove a little brake fluid from the reservoir by suction in order to prevent an overflow when the disc brake pads are pushed back.
1. Screw the two assembly aids (assembly pins) -1- , instead of two wheel bolts, into the wheel hub before removing/fitting the wheel. During removal, first remove the three remaining wheel bolts and remove the wheel carefully without touching the brake discs.
Front-axle brake disc with caliper and assembly aids 1 (threaded bolts for fitting wheel)
2. Then (after removing the wheel), remove the two assembly aids (assembly pins) -1- again.
Information
- Do not open the brake system.
- Do not loosen the brake hose from the brake caliper when loosening the brake caliper.
- The core of the warning contact wire must not be left exposed! It does not matter if the insulation is worn.
- If necessary, remove a little brake fluid from the reservoir by suction in order to prevent an overflow when the disc brake pads are pushed back.
3. Partially remove the brake caliper. Check the following while doing this:
Information
- To gain better access for removal of the brake caliper, turn the steering fully either to the right or left.
3.1. Remove the holders -1, 2- for the brake hydraulic lines from the wheel bearing housing -3-.
Mounting for hydraulic lines (shown as an example, brake caliper removed)
3.2. Pull the brake pad wear indicator line out of the brake caliper.
3.3. Disconnect plug connection for speed sensor.
Information
Protect the paintwork on the brake caliper from damage using a suitable cloth.
4. Carefully press the brake pads back using water pump pliers. Remove a little brake fluid from the reservoir by suction if necessary in order to prevent an overflow!
5. Use removal/assembly aid for brake calipers assembly pin T10439.
Assembly pin on brake caliper
Information
- Never use an impact bolter to loosen and tighten the brake caliper on the wheel carrier.
6. Remove top fastening screw on the brake caliper and insert assembly pin -top direction arrow-.
Fastening screws on brake caliper
7. Remove bottom fastening screw on the brake caliper and insert assembly pin -bottom direction arrow-.
Assembly pin for brake caliper fitted
8. Pull the brake caliper as far as required out of installation position until the brake caliper engages in the cut-outs on the assembly pins. Carefully guide the brake line and brake hose along as well!
Brake caliper tool fitted
9. Fit the brake piston between the brake pads on the brake caliper using piston resetting fixture (replaces P83) Nr.144, refer to Tools and Equipment and press the pads back evenly -arrows-. Remove a little brake fluid from the reservoir by suction if necessary in order to prevent an overflow!
Pressing back brake pads
10. If you intend to re-use the brake pads, mark the relevant installation position. Carefully slide a commercially available screwdriver between the brake pad/brake caliper and lever the brake pad out by turning the screwdriver slightly. When doing this, make sure not to damage the dust boots on the brake pistons -arrows-.
Removing brake pads (shown with brake caliper removed for a better view)
11. Remove pad retaining springs.
Installing front disc brake pads
Installing disc brake pads
Information
- Never use an impact bolter to loosen and tighten the brake caliper on the wheel carrier.
- Visually inspect the thread for the brake caliper and blow it out carefully if necessary using compressed air. Use goggles!
- Replace screws.
- Observe correct tightening torques -> 4X00IN Tightening torques for the brake hydraulic system [1][2]Hydraulic System, Brakes.
WARNING
Old mounting parts fitted on the brake caliper
- Reduced braking effect
- Risk of damage to the brake caliper
-> Fit new pad retaining springs
-> Fit new fastening screws
WARNING
Installation of brake pads with the wrong brake pad quality
- Longer braking distance
- More wear on brake pads
-> Only use the type-specific brake pads listed in the Porsche Parts Catalogue.
-> Replace the brake pads when the brake pad wear indicator light comes on, but no later than when there is a residual pad thickness of 2 mm on each axle.
-> Replace the brake discs on each axle as soon as the brake pad wear limit is reached.
Information
- The back of the pad backing plates must not be greased.
- Check disc brakes for wear. For details of wear limits see -> 465002 Checking front brake discs (wear assessment) 465002 Checking front brake discs (wear assessment).
- Disc brakes must be clean and free of grease.
- The core of the warning contact wire must not be left exposed! It does not matter if the insulation is worn.
- If necessary, remove a little brake fluid from the reservoir by suction in order to prevent an overflow when the disc brake pads are pushed back.
- Use new repair kit.
- Observe correct tightening torques -> 4X00IN Tightening torques for the brake hydraulic system [1][2]Hydraulic System, Brakes.
Installation is performed in reverse order.
1. Fit new pad retaining springs. -> 465002 Checking front brake discs (wear assessment) 465002 Checking front brake discs (wear assessment)
2. Place the brake pad onto the sealing surfaces of the pad retaining springs -arrows-.
Fitting brake pad
3. Press the brake pad into the brake caliper with slight pressure and slide it onto the pad retaining pins -arrows-.
Positioning brake pad
4. Fit the disc brake pad. -direction arrow-
Fitting brake pad
Subsequent work
1. Fit the brake caliper.
-> 473919 Removing and installing front brake caliper 473919 Removing and installing front brake calliper
2. Position disc brake pads by operating the brake several times.
3. Check the brake fluid level and correct it if necessary.
-> 470801 Checking brake fluid level Service and Repair
4. Fit the wheel. Use assembly aids (assembly pins) -1-. -> 44051900 Removing and installing wheel
Brake disc and caliper
Bedding in the brake pads
New brake pads require a bedding-in period of approx. 200 km (125 miles) Only then do they achieve their best friction and wear coefficient! During this period, the brakes should only be subjected to full stress at high speed in emergencies!