Standard Procedure—Main Bearing Fitting; Crankshaft Identification Location Chart; Upper Main Bearing Removal And Installation With Tool C-3059 - Dodge 2001 Ram 1500 Owner's Manual

BR/BE
CRANKSHAFT MAIN BEARINGS (Continued)
Fig. 27 Main Bearing Orientation
STANDARD PROCEDURE—MAIN BEARING
FITTING
Bearing caps are NOT interchangeable and should
be marked at removal to ensure correct assembly.
Upper and lower bearing halves are NOT inter-
changeable. Lower main bearing halves of No. 1 and
3 are interchangeable.
Upper and lower No. 2 bearing halves are flanged
to carry the crankshaft thrust loads. They are NOT
interchangeable with any other bearing halves in the
engine (Fig. 28). Bearing shells are available in stan-
dard and the following undersizes: 0.25 mm (0.001
in.), 0.051 mm (0.002 in.), 0.076 mm (0.003 in.), 0.254
mm (0.010 in.) and 0.305 mm (0.012 in.). Never
install an undersize bearing that will reduce clear-
ance below specifications.
Fig. 28 Main Bearing Identification
CRANKSHAFT IDENTIFICATION LOCATION
ITEM MEASUREMENT
ROD U/S 0.025 mm
(0.001 in.)
MAIN U/S 0.025 mm
(0.001 in.)
REMOVAL
(1) Remove the oil pan (Refer to 9 - ENGINE/LU-
BRICATION/OIL PAN - REMOVAL).
(2) Remove the oil pump (Refer to 9 - ENGINE/
LUBRICATION/OIL PUMP - REMOVAL).
(3) Identify bearing caps before removal. Remove
bearing caps one at a time.
(4) Remove upper half of bearing by inserting
Crankshaft Main Bearing Remover/Installer Tool
C-3059 into the oil hole of crankshaft (Fig. 29).
(5) Slowly rotate crankshaft clockwise, forcing out
upper half of bearing shell.
Fig. 29 Upper Main Bearing Removal and
Installation with Tool C-3059
1 - SPECIAL TOOL C-3059
2 - BEARING
3 - SPECIAL TOOL C-3059
4 - BEARING
ENGINE 3.9L
CHART
IDENTIFICATION
R1-R2-R3 ect.
indicates rod
journal
No. 1, 2 and 3.
M1-M2-M3 or M4
indicates main
journal
No. 1, 2, 3, and 4.
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