Connecting rod, allocating with connecting rod bearing shells to crankshaft
WARNING: This page is about a different car, the 2008 Audi RS 4 and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.
Allocating connecting rod (width of connecting rod base) to crankshaft
- The crankshaft is allocated to a connecting rod of the proper width at the factory. Stamped letters on the narrow side of the base identify the width of the base.
Fig 1: Allocation Of Connecting Rod To Crankshaft Is Identified By Letter On Front Crankshaft Counterweight
- The allocation of the connecting rod to the crankshaft is identified by a letter on the front crankshaft counterweight, as shown in the illustration.
NOTE:
- The numbers under the sequence of letters indicate the allocation of the crank pins from front to rear.
| Letter on crankshaft | Connecting rod base width | |
|---|---|---|
| X | = | narrow (18.650 to 18.669 mm) |
| Y | = | width (18.670 to 18.690 mm) |
Allocation of connecting rod bearing shell thickness to crankshaft
- The crankshaft is allocated to connecting rod bearing shells of the proper thickness at the factory. Colored dots on sides of bearing shells serve for identifying bearing shell thickness.
- The allocation of bearing shells to crankshaft is identified by a letter on the front crankshaft counterweight, as shown in the illustration.
NOTE:
- The numbers under the sequence of letters indicate the allocation of the crank pins from front to rear.
| Letter on crankshaft | Bearing color combination (Connecting rod/cover alternatively) | |
|---|---|---|
| R | = | red/yellow |
| G | = | yellow/blue |
| B | = | blue/blue |