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POWR
Crankcase, connecting rod, and piston
a
1
2
Crankshaft journal oil clearance
check
1. Measure:
• Crankshaft journal oil clearance
Out of specification → Replace the
crankshaft journal bearings.
Measurement steps:
1. Clean the bearings, crankshaft journals,
and bearing portions of the crankcase and
cylinder block.
2. Place the cylinder block upside down on a
bench.
3. Install half of the main bearings 1 into the
cylinder block.
NOTE:
• Install the crankshaft journal bearings in their
original positions.
• Insert the projection a of each bearing into
the slots in the cylinder block.
4. Install the crankshaft.
5. Put a piece of Plastigauge 2 on each
crankshaft journal, parallel to the crank-
shaft.
NOTE:
Do not put the Plastigauge over the oil hole in
the main journals of the crankshaft.
6. Install the remaining half of the main bear-
ings into the crankcase.
NOTE:
• Install the crankshaft journal bearings in their
original positions.
• Insert the projection a of each bearing into
the slots in the crankcase.
7. Install the crankcase onto the cylinder
block.
5-108
E
1
2
3
4
5
6
7
8
9
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