CRANKSHAFT AND MAIN BEARINGS - CONTINUED
For more information on how to clean parts, go to General Maintenance Instructions (page 2-46).
Solvent burns easily. Solvent fumes can explode. Do not smoke or allow open flame nearby when using
solvent. Failure to observe these precautions could cause serious injury or death.
All metal parts
Clean in drycleaning solvent.
Wipe dry with clean, dry rags.
For more information on how to inspect parts, go to General Maintenance Instructions (page 2-46).
Replace damaged or defective parts as needed.
Because of heat treatment, no attempt should be made to regrind journals for use of undersize bearings.
Grinding will cause tiny cracks at the fillet areas which will lead to crankshaft breakage and serious damage
to the engine.
Look for cracks, scratches, nicks, and
Look at keyway for cracks and wear.
Look at journals for discoloration
caused by overheating.
If crankshaft has been overheated,
heat treatment has been destroyed
and crankshaft must be replaced.
Using micrometer, measure journals.
Main journal diameter must be
3.1235 - 3.1245 inches (79.34 -
79.36 mm). Connecting rod
journals diameters must be 2.753 -
2.754 inches (69.93 - 69.95 mm).