Visual Inspection

NOTE: Engine bearings are the precision insert type. The bearings are available for service use in standard and 0.001 inch undersize.

CAUTION: Do not scrape, shim, or file bearing inserts. If the bearing surface of the insert is touched with bare fingers, the skin oil and acids will etch the bearing surface.

1. Inspect bearing surfaces for the following conditions:
^ Wear
^ Gouges
^ Embedded foreign material: If foreign material is found, determine its nature and source. Inspect the oil pan sludge and residue.
^ Uneven side to side wear: If uneven wear is found, check for a bent crankshaft or tapered bearing journals.
2. Inspect the outer surfaces for the following conditions:
^ Wear: Surface wear indicates either movement of the insert or high spots in the surrounding material (spot wear).
^ Overheating (discoloration)
^ Looseness or rotation (flattened tangs and wear grooves)

NOTE: Carefully investigate bearing failure, other than normal wear.

3. Inspect the connecting rods or main bearing bores. Complete the following steps:
a. Torque the bearing cap to specifications.
b. Measure the bore for taper and out of round.
c. Ensure that taper or out of round does not exist.
4. Inspect the bearing cap bolts. Replace the bolts, if the bolts are stretched.
5. In order to determine if a bolt is stretched compare it to a new bolt.