| Diameter of Main Bearing bore in crankcase | Number of chisel punches | Color coding for bearing shell | Main Bearing play (mm) |
|---|---|---|---|
| 68.500-68.506 | 1 | Blue | 0.03 -0.052 |
| 68.506-68.513 | 2 | Yellow | 0.030-0.052 |
| 68.513-68.519 | 3 | Red | 0.030-0.052 |
Scheme 79
The top bearing shell halves are assigned to the specific journal of the crankshaft by means of a colored ring on the rear of the upper bearing shell half and numbers or center punch marks, which are stamped into the crankcase near the bearing cap. Only the assigned color and numerical combinations may be fitted together. EXAMPLE: You see the number 2 or two punch marks stamped into the cylinder block, you need to use the Yellow bearing shell half for the upper bearing shell.