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(2) Main bearing-to-crankshaft clearance (oil clearance)
• Fit the upper main bearing into the crankcase and the lower
main bearing into the main bearing cap.
• Tighten the main bearing cap bolts to a torque of 78 N·m {8
kgf·m}.
• Measure the inside diameter of the main bearing and the diame-
ter of the corresponding crankshaft journal.
• If the difference between the measurements exceeds the speci-
fied limit, machine the crankshaft journal to one of the specified
undersize dimensions.
Inspection: Crankshaft
(1) Bend
• Measure the crankshaft at the center journal for bend while sup-
porting the shaft at the end journals.
• A half of the dial gauge reading obtained as the crankshaft is ro-
tated by a full turn represents the bend of the crankshaft.
• If the measurement exceeds the specified limit, replace the
crankshaft.
(2) Roundness and cylindricity of crankshaft journals and
pins
• If any of the measurements exceeds the specified limits, grind
the crankshaft journal(s) and/or pin(s) to undersize(s) or replace
the crankshaft.
CRANKSHAFT AND CRANKCASE
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