Crankshaft Installation
| ITEM | DESCRIPTION |
|---|---|
| 1 | Bolt - Main bearing cap (quantity 14) |
| 2 | Main bearing cap (quantity 7) |
| 3 | Orientation arrow |
The crankshaft is retained in position by 7 main bearing caps that are manufactured from sintered steel. Each individual main bearing cap has a numbered identification (1-7) and an arrow to make sure of the 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 size of the main bearings 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 7 alpha characters in the order of the crankshaft main bearing journals 1-7. A data matrix code contains 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
Except for the central main bearing, all main bearings in the cylinder block have 2 central holes and an internal groove to allow for main bearing journal lubrication. The central main bearing has only 1 hole, without any internal groove. The main bearings in the main bearing caps are plain with no hole or internal groove.