INSPECTION / REPAIR

B2-84prose procedureUnverified

1
Check the journals and pins for damage, scoring, and oil hole clogging.
2
Set the crankshaft No.1 and No.4 main journals on V-blocks.
3
Measure the crankshaft runout at No.2 and No.4 journals. Replace the crankshaft if necessary.
4
Measure each journal diameter in X and Y directions at two points (A and B) as shown.
5
If the diameter is less than the specification, grind the journals to match undersize bearings.

Specification	Value
Runout	0.015 mm {0.0006 in} max.
Main journal Diameter	61.955 mm {2.4385–2.4391 in}
Main journal Out-of-round	0.05 mm {0.0020 in} max.
Crank pin journal Diameter	47.940–47.955 mm {1.8874–1.879 in}
Crank pin journal Out-of-round	0.05 mm {0.0020 in} max.
Undersize bearing	0.25 mm {0.01 in}

Runout

0.015 mm {0.0006 in} max.

Main journal Diameter

61.955 mm {2.4385–2.4391 in}

Main journal Out-of-round

0.05 mm {0.0020 in} max.

Crank pin journal Diameter

47.940–47.955 mm {1.8874–1.879 in}

Crank pin journal Out-of-round

0.05 mm {0.0020 in} max.

Undersize bearing

0.25 mm {0.01 in}

Bearing size	Journal diameter
0.25 {0.01} undersize	61.668–61.705 {2.4287–2.4293}

0.25 {0.01} undersize

Journal diameter61.668–61.705 {2.4287–2.4293}

Bearing size	Journal diameter
0.25 {0.01} undersize	47.690–47.705 {1.8776–1.8781}

0.25 {0.01} undersize

Journal diameter47.690–47.705 {1.8776–1.8781}

BEARING

Check the main bearings and the connecting rod bearings for peeling, scoring, and other damage.