Isuzu 2000 Trooper Workshop Manual page 782

2. Measure the diameter and the uneven wear of main
journal and crank pin. If the crankshaft wear exceeds
the specified limit, crankshaft must be replaced.
Main journal diameter : 63.918 mm–63.933 mm
(2.5165 in–2.5170 in)
Crank pin diameter : 53.922 mm–53.937 mm
(2.1229 in.–2.1235 in.)
Uneven wear limit : 0.005 mm (0.0002 in)
Crankshaft Bearing Selection
When installing new crankshaft bearings or replacing
bearings, refer to the selection table below. Select and
install the new crankshaft bearings, paying close
attention to the cylinder block journal hole.
1. Diameter size mark (1) and the crankshaft journal.
2. Diameter size mark (1).
The diameter size marks are stamped on the No.1
crankshaft balancer as shown in the illustration.
NOTE: Take care to ensure the bearings are positioned
correctly.
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Legend
(1) Number 1 and 4 main bearing upper and lower
(2) Number 2 and 3 main bearing upper
(3) Number 2 and 3 main bearing lower
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ENGINE MECHANICAL 6A–69
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