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Home >> Jeep >> 2008 >> Commander Base, 3.7 K, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (5.7L Engine (Service Information)) >> Engine Block >> Bearings-Crankshaft Main >> Standard Procedure >> Crankshaft Main Bearing - Fitting >> Crankshaft Main Bearing Selection

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, corresponding with journal number 1, 2, 3, 4 and 5.

NOTE: Service main bearings are coded. These codes identify what size (grade) the bearing is.
MAIN BEARING SELECTION CHART - 5.7L

GRADE  SIZE mm (in.)  FOR USE WITH 
MARKING  JOURNAL SIZE 
A  0.008 mm U/S 64.988-64.995 mm
- (0.0004 in.) U/S (2.5585- 2.5588in.)
B  NOMINAL 64.996-65.004 mm
- (2.5588-2.5592 in.)
C  0.008 mm O/S 65.005-65.012 mm
- (0.0004 in.) O/S (2.5592-2.5595 in.)
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