Crankshaft Main Bearing Selection
WARNING: This page is about a different variant/trim than selected.
The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft counterweight has grade identification marks stamped into it. These marks are read from left to right.The left letter (1) refers to the number one main journal and the right letter (2) refers to the number 5 journal.
NOTE:
Service main bearings are coded. These codes identify what size or grade of the bearing.
MAIN BEARING SELECTION CHART - 5.7L
| GRADE MARKING | BEARING SIZE | FOR USE WITH JOURNAL SIZE | ||
|---|---|---|---|---|
| - | METRIC | STANDARD | METRIC | STANDARD |
| A | 0.008 mm U/S | 0.0004 in. U/S | 64.988 - 64.995 mm | 2.5585 - 2.5588in. |
| B | NOMINAL | 64.996 - 65.004 mm | 2.5588 - 2.5592 in. | |
| C | 0.008 mm O/S | 0.0004 in. O/S | 65.005 - 65.012 mm | 2.5592 - 2.5595 in. |