Engine distributors WSG-1068 - Crankshaft Main Bearing Journal Clearance; Bearing Inspection

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WSG-1068 GENERAL INFORMATION
Crankshaft Main Bearing Journal
Clearance
Special Tool(s)
NOTE: Crankshaft main bearing journals must be within
specifications before checking journal clearance.
1. Remove the crankshaft main bearing caps and
bearings.
2. Lay a piece of Plastigage® across the face of
each crankshaft main surface.
NOTE: Do not turn the crankshaft while doing this
procedure.
3. Install and remove the crankshaft main bearing
cap.
4. Verify the crankshaft journal clearance.
 If it is out of specification, replace as necessary
Bearing Inspection
Inspect bearings for the following defects. Possible
causes are shown:
 Cratering – fatigue failure (A)
 Spot polishing – improper seating (B)
 Scratching – dirty (C)
 Base exposed – poor lubrication (D)
 Both edges worn – journal damaged (E)
 One edge worn – journal tapered or bearing not
seated (F)