Crankshaft Main Bearing Selection
| Crankshaft Marking | JOURNAL SIZE SIZE mm (in.) |
|
| "R" Size | 63.488 - 63.496 mm (2.4995 - 2.4998 in.) |
|
| "S" Size | 63.496 - 63.500 mm (2.4998 - 2.4999 in.) | |
| "T" Size | 63.500 - 63.504 mm (2.4999 - 2.501 in.) | |
| "U" Size | 63.504 - 63.512 mm (2.5001 - 2.5004 in.) | |
| Bearing size | ||
| Bearing Code | Size | Application |
| Upper Bearing | ||
| A | .2.443 - 2.447 mm | Use with crankshaft size "R" |
| (.0961 -.0963 in.) | - | |
| B | 2.439 - 2.443 mm | Use with crankshaft "S, T" |
| (0.960 -.0961 in.) | - | |
| C | 2.435 - 2.439 mm | Use with crankshaft "U" |
| (.0958 -.0960 in.) | - | |
| Lower Bearing Main "1" and "4" | ||
| "1" | 2.441 - 2.447 mm | Use with crankshaft "R, S" |
| - | (.0961 -.0963 in.) | |
| "2" | 2.435 - 2.441 mm | Use with crankshaft "T, U" |
| - | (.0958 -.0962 in.) | |
| Lower Main Bearing "2" and "3" | ||
| "3" | 2.429 - 2.435 mm | Use with crankshaft "R, S" |
| - | (.0956 -.0958 in.) | |
| "4" | 2.423 - 2.429 mm | Use with crankshaft "T, U" |
| - | (.0953 -.0956 in.) | |
| Bearing Clearances | ||
| Main "1, 4" | ||
| Crankshaft "R" | .004 -.034 mm (.00015 -.0013 in.) | |
| Crankshaft "S" | .004 -.030 mm (.00015 -.0011 in.) | |
| Crankshaft "T" | .006 -.032 mm (.0002 -.0012 in.) | |
| Crankshaft "U" | .002 -.032 mm (.00007 -. 0012 in.) | |
| Main "2, 3" | ||
| Crankshaft "R" | .016 -.046 mm (.0006 -.0018 in.) | |
| Crankshaft "S" | .016 -.042 mm (.00062 -.016 in.) | |
| Crankshaft "T" | .018 -.044 mm (.0007 -.0017 in.) | |
| Crankshaft "U" | .014 -.044 mm (.0005 -.0017 in.) | |
- Service main bearings are available in four grades. The chart identifies the four service grades available.