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Crankshaft Inspection
Straightness
NOTE:
• Clean the crankshaft oil passages w i t h pipe cleaners
or a suitable brush.
• Check the keyway and threads.
1. Remove the crankshaft f r o m the engine block (see
page 7-18).
2. Clean the crankshaft oil passages with pipe
cleaners or a suitable brush.
3. Clean the keyway and thread; repair or replace it if
necessary.
4. Support the crankshaft w i t h a V-blocks.
5. Measure runout on all m a i n journals to make sure
the crank is not bent. Rotate the crankshaft t w o
complete revolutions. The difference between
measurements o n each journal must not be more
than the service limit.
Crankshaft Total Indicator Runout:
Standard (New): 0.03 mm (0.001 in.) max.
Service Limit:
0.04 m m (0.002 in.)
Out-of-Round and Taper
1. Measure out-of-round at the middle of each rod
and main journal in t w o places. The difference
between measurements on each journal must not
be more than the service limit.
Journal Out-of-Round:
Standard (New): 0.005 mm (0.0002 in.) max.
Service Limit:
0.006 mm (0.0002 in.)
TT
2. Measure taper at the edge of each rod and m a i n
journal. The difference between measurements on
each journal must not be more than the service
limit.
Journal Taper:
Standard (New): 0.005 mm (0.0002 in.) max.
Service Limit:
0.006 mm (0.0002 in.)
7-21
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Troubleshooting
