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8-24 ENGINE BOTTOM END
Crankshaft and Connecting Rods
Crankshaft Main Bearing Insert/Journal Wear
•
Measure the bearing insert/journal [B] clearance with a
plastigage [A].
NOTE
○
Tighten the crankcase bolts to the specified torque (see
Crankcase Assembly).
○
Do not turn the crankshaft during clearance measure-
ment.
○
Journal clearance less than 0.025 mm (0.0010 in.) can
not be measured by plastigage, however, using genuine
parts maintains the minimum standard clearance.
Crankshaft Main Bearing Insert/Journal Clearance
Standard: 0.030 ∼ 0.054 mm (0.0012 ∼ 0.0021 in.)
Service Limit: 0.08 mm (0.0032 in.)
If clearance is within the standard, no bearing replace-
ment is required.
If clearance is between 0.055 mm (0.022 in.) and the ser-
vice limit (0.08 mm, 0.0032 in.), replace the bearing in-
serts [A] with inserts painted blue [B]. Check insert/journal
clearance with the plastigage. The clearance may exceed
the standard slightly, but it must not be less than the min-
imum in order to avoid bearing seizure.
If clearance exceeds the service limit, measure the diam-
eter of the crankshaft main journal.
Crankshaft Main Journal Diameter
Standard: 40.984 ∼ 41.000 mm (1.6135 ∼ 1.6142 in.)
Service Limit: 40.96 mm (1.613 in.)
If any journal has worn past the service limit, replace the
crankshaft with a new one.
If the measured journal diameters are not less than the
service limit, but do not coincide with the original diameter
markings on the c rankshaft, make new marks on it.
Crankshaft Main Journal D iameter Marks
None
40.984 ∼ 40.992 mm (1.6135 ∼ 1.61385 in.)
1
40.993 ∼ 41.000 mm (1.61389 ∼ 1.6142 in.)
■:
Crankshaft Main Journal Diameter M arks, "1" mark or
no mark.