Visual Inspection

WARNING: This page is about a different variant/trim than selected.

Inspect the 5 crankshaft bearing journals (1) and 4 connecting rod bearing journals (2) for wear:

Fig 1: Crankshaft Bearing Journal And Connecting Rod Journal Inspection Areas
Courtesy of GENERAL MOTORS COMPANY
- Grooves or scoring
- Scratches
- Pitting or imbedded bearing material
Inspect crankshaft bearings for craters or pockets. Flattened sections on the bearing halves also indicate fatigue.

Fig 2: Identifying Crankshaft Bearing Craters Or Pockets
Courtesy of GENERAL MOTORS COMPANY
Inspect the crankshaft bearings for excessive scoring or discoloration.

Fig 3: Identifying Connecting Rod Bearing Scoring Or Discoloration
Courtesy of GENERAL MOTORS COMPANY
Inspect the crankshaft bearings for dirt or debris imbedded into the bearing material.
Inspect the crankshaft bearings for improper seating indicated by bright, polished sections of the bearing.

Fig 4: View Of Crankshaft Bearing Improper Seating
Courtesy of GENERAL MOTORS COMPANY

NOTE:
If the lower half of the bearing is worn or damaged, both upper and lower halves should be replaced.

Generally, if the lower half is suitable for use, the upper half should also be suitable for use.