Disassembly and assembly

Installation Procedure
Table 68
Required Tools
Tool Part Number
Part Description Qty
B
27610289
Angle Gauge
1
C
21825617 Dial Indicator 1
-
Magnetic Base and Stand
1
NOTICE
This procedure must only be used to remove and in-
stall the main bearing shells with the crankshaft in
position.
The removal procedure and the installation proce-
dure must be completed for each pair of main bearing
shells before the next pair of main bearing shells are
removed.
NOTICE
Keep all parts clean from contaminants.
Contaminants may cause rapid wear and shortened
component life.
1. Ensure that the main bearing shells are clean and
free from wear and damage. If necessary, replace
the main bearing shells.
Note: If the main bearing shells are replaced, check
whether oversize main bearing shells were
previously installed. If the thrust washers are
replaced, check whether oversize thrust washers
were previously installed.
2. Clean the journals of the crankshaft. Inspect the
journals of the crankshaft for damage. If
necessary, replace the crankshaft or recondition
the crankshaft.
Illustration 307 g03003457
Illustration 308 g03003257
3. For number three main bearing, ensure that two
thrust washers (4) are clean and free from wear
and damage. If necessary, replace the thrust
washers. Lubricate thrust washers (4) with clean
engine oil.
Note: The upper main bearing shell has a groove
and oil hole.
4. Lubricate the crankshaft journal and upper main
bearing shell (8) with clean engine oil. Slide upper
main bearing shell (8) into position between the
crankshaft journal and the cylinder block. Ensure
that the locating tab for the upper main bearing
shell is correctly seated in the slot in the cylinder
block.
168 UENR0624-03
Disassembly and Assembly Section
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