5-105
E
POWR
CRANKSHAFT
CAUTION:
Do not interchange the crankshaft journal
bearings. To obtain the correct crankshaft-
journal-to-crankshaft-journal-bearing clear-
ance and prevent engine damage, the
crankshaft journal bearings must be
installed in their original positions.
Measurement steps:
• Clean the crankshaft journal bearings,
crankshaft journals, and bearing portions
of the crankcase.
• Place the upper crankcase upside down
on a bench.
• Install the crankshaft journal upper bear-
ings
1
and the crankshaft into the upper
crankcase.
NOTE:
Align the projections
a
of the crankshaft
journal upper bearings with the notches
b
in the upper crankcase.
• Put a piece of Plastigauge
2
on each
crankshaft journal.
NOTE:
Do not put the Plastigauge over the oil hole
in the crankshaft journal.
• Install the crankshaft journal lower bear-
ings into the lower crankcase and assem-
ble the crankcase halves.
NOTE:
• Align the projections
a
of the crankshaft
journal lower bearings with the notches
b
in the lower crankcase.
• Do not move the crankshaft until the
clearance measurement has been com-
pleted.
1
a
b
2
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