Crankshaft Inspection - Mazda B-Series 1997 Workshop Manual

INSPECTION
/
REPAIR
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Note
The piston pin bore and crankshaft bearing bore
must be parallel and in the same vertical plane,
within the specified total difference when mea-
sured at the ends of an 203.2mm (8 in} bar, 101.6mm
(4 in) on each side of the connecting rod centerline.
3. Measure the connecting rod crankshaft bearing bore
diameter.
Diameter
55.170-55.1 90mm (2.1720-2.1728 in)
4. If the diameter exceeds the specification, replace the
connecting rod.
5. Measure the connecting rod crankshaft bearing bore
out-of-round and taper.
Out-of-round: 0.01 mm (0.0004 in)
Taper: 0.01 mm (0.0004 in)
6. If the out-of-round or taper measurements exceed the
maximum, replace the connecting rod.
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 at the center main bearing
journal. Replace the crankshaft if necessary.
Runout: 0.0508mm (0.002 in)
Max: 0.127mm (0.005 in)
4. Measure each journal diameter in the X and Y directions
at two points.
Main journal
Diameter: 56.02-56.00mm (2.2059-2.2051 in}
Out-of-round: 0.0152mm (0.0006 in)
Crankpin journal
Diameter: 51.97-51.99mm (2.0462-2.0472 in)
Out-of-round: 0.0152mm (0.0006 in)