Crankshaft Main Bearing Selection
WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
| CRANKSHAFT MARKING |
JOURNAL SIZE |
| - |
Metric |
Standard |
| "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.