Crankshaft Main Bearing Selection

WARNING: This page is about a different variant/trim than selected.

Fig 1: Main Bearing Markings on Target Wheel

Courtesy of CHRYSLER LLC

1 - REARMOST CRANKSHAFT COUNTER WEIGHT

2 - TARGET WHEEL

3 - MAIN BEARING SELECT FIT MARKINGS

The main bearings are "select fit" to achieve proper oil clearances. For main bearing selection, the crankshaft position sensor target wheel has grade identification marks stamped into it (3). These marks are read from left to right, corresponding with journal number 1, 2, 3, 4 and 5. The crankshaft position sensor target wheel (2) is mounted to the number 8 counter weight (1) on the crankshaft.

NOTE: Service main bearings are coded. These codes identify what size (grade) the bearing is.

MAIN BEARING SELECTION CHART - 4.7L

GRADE	SIZE mm (in.)	FOR USE WITH
	MARKING	JOURNAL SIZE
A	0.008 mm U/S	63.488-63.496 mm
-	(0.0004 in.) U/S	(2.4996-2.4999 in.)
B	NOMINAL	63.496-63.504 mm
	-	(2.4999-2.5002 in.)
C	0.008 mm O/S	63.504-63.512 mm
-	(0.0004 in.) O/S	(2.5002-2.5005 in.)