Crankshaft Installation
| ITEM | DESCRIPTION |
|---|---|
| 1 | Bolt - Main bearing cap (10 off) |
| 2 | Front main bearing cap |
| 3 | Orientation arrow |
| 4 | Main bearing cap (3 off) |
| 5 | Rear main bearing cap |
The crankshaft is retained in position by five main bearing caps that are manufactured from sintered steel. Each individual main bearing cap has a numbered identification (1-5) and an arrow to ensure correct location and orientation; the arrow must face towards the front of the engine.
There are a number of grades of main bearing available. Each main bearing shell is color coded and inkjet marked with a number on the running face of the bearing. The crankshaft is laser etched with a string of five alpha characters in the order of crankshaft main bearing journals 1-5 and a data matrix code containing the same data. The correct main bearing shells are selected with reference to a selection chart in order to achieve optimum running clearances.
For additional information, refer to: Specifications (303-01C Engine - INGENIUM I4 2.0L Petrol, Specifications).
The main bearing shells in the cylinder block have a central hole and an internal groove to allow for main bearing journal lubrication. The main bearing shells in the main bearing caps are plain with no hole or internal groove.