48
7
7
Inspect Crankshaft
1. Inspect crankshaft journals for grooves or
signs of scoring. If found, crankshaft must
be re-ground or replaced.
2. Check the main bearing and crankpin
journals for wear and taper (Figure 1).
Figure 1
• Standard Size (Main) - 1.6525 - 1.6535 in.
(41.976 - 42.000 mm)
• Standard Size (Crankpin) - 1.4557 - 1.4567
in. (36.976 - 37.000 mm)
• Maximum out of round and taper - 0.0008
in. (0.02 mm)
3. If crankshaft journals are not within
specification, the crankshaft may be re-
ground and 0.010 in. (0.25 mm) undersize
bearings installed. See illustrated parts list for
part numbers.
4. Check the crankshaft for run-out at #3 main
bearing journal (Figure 2).
Figure 2
• Maximum Run-out - 0.0023 in. (0.06 mm)
NOTE: If run-out exceeds specification shown, the
crankshaft must be replaced.
5. Check crankshaft timing gear teeth for
damage (Figure 3). If timing gear teeth are
damaged or worn, the crankshaft must be
replaced.
NOTE: See Section 3 for procedure to check
crankshaft timing gear for wear.
Figure 3
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