Description And Operation: Engine: Description: Crankshaft
| ITEM | DESCRIPTION |
|---|---|
| 1 | Thrust washers (2 off) |
| 2 | Upper main bearings (5 off) |
| 3 | Crankshaft |
| 4 | Crankshaft pulley/mass damper location |
| 5 | Alignment roll pin - Crankshaft pulley/mass damper |
| 6 | Lower main bearings (5 off) |
| 7 | Dynamic balancer drive gear |
| 8 | Timing chain drive sprocket |
| 9 | Alignment dowel - Drive plate |
The crankshaft is manufactured from forged carbon steel C38 MOD with induction hardened main and connecting rod big end bearing journals. The fillets of the main and big end journals are fillet rolled to improve the strength of the crankshaft.
There are differences in the main and the connecting rod big end bearing journal diameters between the crankshaft of Ingenium I4 2.0L Diesel 163 PS and 180 PS engine and of Ingenium I4 2.0L Diesel 240 PS engine.
The main bearing journal diameters are the following:
- Ingenium I4 2.0L Diesel 163 PS and 180 PS engine - 55 mm
- Ingenium I4 2.0L Diesel 240 PS engine - 59 mm
The connecting rod bearing journal diameters are the following:
- Ingenium I4 2.0L Diesel 163 PS and 180 PS engine - 50 mm
- Ingenium I4 2.0L Diesel 240 PS engine - 55 mm
A five counterweight design has been used to balance bearing loads to give class leading vibration levels.
An oil groove in the upper half of each main bearing transfers pressurized engine oil into the crankshaft for lubrication of both the main bearings and connecting rod bearings. The crankshaft assembly comprises the bare crank and a dynamic balancer shaft system drive gear. This gives direct drive at a ratio of 2:1 of the two counter rotating dynamic balancer shafts.
Two individual thrust washers are located on either side of the central main bearing journal panel of the cylinder block to control crankshaft end float.