Steam-clean or use hot, soapy water to clean the main bearing caps.
Dry with compressed air.
Inspect all main bearing caps, capscrews and thrust bearings for deep scoring, overheating, etc.
Replace any damaged components. If the main bearing cap is damaged, the block must be replaced.
Check the main bearing caps to make sure the ring dowels are installed.
Check the crankshaft main bearing journals for damage or excessive wear. Minor scratches are acceptable.
If crankshaft end play measured during the initial check was found to be out of specification, make sure to visually
check the crankshaft thrust surface for excessive wear or damage. Minor scratches are acceptable.
Six-cylinder engines – the number 6 main bearing journal.
If damage is found, the crankshaft will need to be removed. Refer to Procedure 001-016 in Section 1.
Also check the thrust bearing surfaces for excessive wear.
Replace the thrust bearing(s) if excessive wear is found.
Inspect the bearings for damage.
Replace any bearings with the following damage:
โข Pitting
โข Flaking
โข Corrosion
โข Lock tang damage
โข Scratches.
Inspect the bearing shell seating surfaces for nicks or burrs. If nicks or burrs can not be removed with an
abrasive pad, Part Number 3823258 or equivalent, the bearings must be replaced.
NOTE: If bearings are damaged they must be replaced as a set.
NOTE: For more detailed information on bearing damage, refer to “Analysis and Prevention of Bearing Failures”
Bulletin 3810387.
