ENGINE MECHANICAL 6A–101
Inspection and Repair
Make the necessary adjustments, repairs, and part
replacements if excessive wear or damage is
discovered during inspection.
Crankshaft
Inspect the surface of the crankshaft journals and
crankpins for excessive wear and damage.
Inspect the oil ports for obstructions.
Bearing Spread
Check the bearing spread.
Finger pressure should be sufficient to fit the bearing
into position.
If the bearing fits loosely, it must be replaced.
Crankshaft Run-Out
1. Set a dial indicator to the center of the No.4
crankshaft journal.
2. Gently turn the crankshaft in the normal direction of
engine rotation.
Read the dial indicator as you turn the crankshaft.
If the measured value exceeds the specified limit, the
crankshaft must be replaced.
Standard: 0.06 mm (0.0024 in) or less
Limit: 0.45 mm (0.018 in)
Crankshaft Journal and Crankpin Diameter
1. Use a micrometer to measure the crankshaft journal
diameter across points (1) – (1) and
(2) – (2).
2. Use the micrometer to measure the crankshaft
journal diameter at the two points ((3) and (4)).
3. Repeat Steps 1 and 2 to measure the crankshaft pin
diameter.
Crankshaft journal diameter
Standard:
No. 4 journal: 81.875 – 81.895 mm
(3.2234 – 3.2242 in)
Others: 81.905 – 81.925 mm (3.2246 – 3.2254 in)
Crankshaft pin diameter
Standard: 65.902 – 65.922 mm (2.5946 – 2.5953 in)
Crankshaft journal and crankpin uneven wear
Limit: 0.05 mm (0.0020 in)
014EY00118
015EY00189
014EY00120
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