Crankshaft Inspection (3.0L) - Mazda B-Series 1997 Workshop Manual

INSPECTION / REPAIR
4. Check the connecting rod-to-crankshaft side clearance.
Clearance (assembled to crank)
Standard: 0.1 5-0.35mm (0.006---0.014 in)
Maximum: 0.36mm (0.014 in)
5. If the side clearance exceeds the maximum, check both
the connecting rod and the crankshaft, and replace as
necessary.
6. Measure the connecting rod crankshaft bearing bore
diameter.
Diameter: 57.15-57.1 7mm (2.250--2.251 in]
7.
If the diameter exceeds the specification, replace the
connecting rod.
8. Measure the connecting rod bearing thickness.
Bearing thickness
Standard: 1.557-1.570mm (0.061 2-4.0618 in)
CRANKSHAFT
1. Check the journals and pins for damage, scoring, and oil
hole clogging.
2.
Set the crankshaft on V-blocks.
3. Measure the crankshaft runout. Replace the crankshaft if
necessary.
Runout: 0.05mm (0.002 in)
4. Measure each journal diameter in the X and Y directions
at two points.
Main journal
Diameter: 63.983-64.003mm (2.51 90-2.51 98 in)
Out-of-round: 0.008mm (0.0003 in) maximum
Crankpin journal
Diameter: 53.983-54.003mm (2.1 253-2.1 261 in)
Out-of-round: 0.006mm {0.000:! in) maximum
0.01 5mm (0.000ti in) Total
5. If the diameter is less than the minimum, grind the journals
to accept undersize bearings.
Undersize bearings:
0.025mm (0.001 in)
0.050mm (0.002 in)
6. Measure the taper of each journal
Main journal
Taper: 0.008mm125mm (0.0003 iinll in)
Crankpin journal
Taper: 0.008mm/25mm (0.0003 iinll in)
7. If the out-of-round or taper measurements exceed the
maximum, replace the crankshaft.
82-45