Test Values And Wear Limits For Panamera V6/V8 PCCB Brake System
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 Porsche Panamera, 2015 Porsche Panamera, 2014 Porsche Panamera, 2013 Porsche Panamera, and 2012 Porsche Panamera. However, it is still accessible from the selected car via links, so may be relevant.
Information
The following condition criteria can make replacement necessary depending on the wear of the PCCB brake discs:
- Surface changes in the brake disc friction surfaces at an advanced stage.
- Minimum brake disc thickness is not retained due to wear (material erosion due to friction).
Information
The PCCB brake disc must not be machined.
| Location | Description | Type | Basic value | Tolerance 1 | Tolerance 2 |
|---|---|---|---|---|---|
| Pad thickness, front | Wear limit 2 mm | approx. 10.0 mm | |||
| Pad thickness, rear | Wear limit 2 mm | approx. 10.5 mm | |||
| Brake disc thickness, front | New | 38 mm | +0.1 mm | -0.1 mm | |
| Brake disc thickness, rear | New | 28 mm | +0.1 mm | -0.1 mm | |
| Brake disc wear dimension, front | 37.7 mm | ||||
| Brake disc wear dimension, rear | 27.7 mm | ||||
| Brake disc wear limit, front | Minimum brake disc thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th. 37.7 mm | mm (Read value on brake disc hub) XX.X | |||
| Brake disc wear limit, rear | Minimum brake disc thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th. 29.7 mm | mm (Read value on brake disc hub) XX.X | |||
| Peak-to-valley surface roughness of brake disc | New | 0.006 mm | |||
| Wear limit: Surface changes in front and rear brake discs | Wear limit: Connected surface fracture > 1 cm2 and/or surface roughness of brake disc > 80 micrometer. Replace PCCB brake discs on each axle. | Values and procedure for: 46 51 02 Checking front PCCB brake discs/46 54 02 Checking rear PCCB brake discs. | |||
| Lateral runout of brake disc, max. | 0.03 mm | ||||
| Lateral runout of wheel hub, max. | 0.02 mm | ||||
| Lateral runout of brake disc when installed, max. | 0.07 mm | ||||
| Pushrod play | Not adjustable | ||||
| Parking brake (foot-operated parking brake) | Drum brake acting electro-mechanically on both rear wheels | ||||
| Parking-brake drum diameter | 180 mm | ||||
| Brake shoe width | 30 mm | ||||
| Brake pad thickness | Wear limit 1 mm | 3 mm |
Possible complaints
- Brake disc becomes distorted as a result of serious driving.
- Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.
Procedure
- Check brake disc for cracks, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.