Crankshaft Installation
| ITEM | DESCRIPTION |
|---|---|
| 1 | Bolt - Main bearing cap (10 off) |
| 2 | Main bearing cap - Front |
| 3 | Orientation arrow |
| 4 | Main bearing cap (3 off) |
| 5 | Main bearing cap - Rear |
The crankshaft is retained in position by 5 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 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 5 alpha characters in the order of the crankshaft main bearing journals 1-5 and a data matrix code containing the same data. The correct main bearings are selected with reference to a selection chart in order to achieve optimum running clearances. For additional information, Refer to: SPECIFICATIONS .
The main bearings in the cylinder block have a central hole and an internal groove to allow for main bearing journal lubrication. The main bearings in the main bearing caps are plain with no hole or internal groove.