Main Bearing Shells, New Crankshaft, Allocating
WARNING: This page is about a different car, the 2015 Audi S7, 2015 Audi RS 7, 2014 Audi S7, 2014 Audi RS 7, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.
- Bearing shells with the correct thickness are allocated to the cylinder block in the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.
- Allocation of bearing shells to cylinder block is marked by one letter each at front left on cylinder block (can be read from outside) as shown in the illustration.
| Letter on Cylinder Block | Color of Bearing | |
|---|---|---|
| R | = | Red |
| S | = | Black |
| G | = | Yellow |
| U | = | Green |
| B | = | Blue |
NOTE:
In addition, the letters are also stamped on the guide frame.
- Bearing shells with the correct thickness are allocated to the guide frame in the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.
- The allocation of bearing shells to guide frame is identified by a letter on the front crankshaft flange, as shown in the illustration.
- The letter series begins with crankshaft bearing "5" (transmission side) and ends with crankshaft bearing "1" (belt pulley side).
| Code Letter on the Crankshaft Flange | Color of Bearing | |
|---|---|---|
| R | = | Red |
| S | = | Black |
| G | = | Yellow |
| U | = | Green |
| B | = | Blue |