Crankshaft Check; Crank Pin Journal Check - Mazda 626 MX-6 Workshop Manual

86U01X-108
86U01X-109
Crank pin
Main journal
86U01X-111
INSPECTION AND REPAIR
3. Check each connecting rod for bending or twist­
ing. Repair or replace if necessary.
B end: 0.06 mm (0.0024 in) max.
Twist: 0.06 mm (0.0024 in) max.
Crankshaft
1. Check the journals and pins for damage, scoring,
or oil hole clogging.
2. Set the crankshaft on V-blocks.
3. Check the crankshaft runout at the center journal.
Replace if necessary.
Runout: 0.03 mm (0.0012 in) max.
4. Measure each journal diameter in X and Y direc­
tions at two points.
Main journal
Diameter:
59.937—59.955 mm (2.3597—2.3604 in)
Minimum: 59.89 mm (2.358 in)
Out-of-round: 0.05 mm (0.0020 in) max.
Crank pin journal
Diameter:
50.940—50.955 mm (2.0055—2.0061 in)
Minimum: 50.89 mm (2.004 in)
Out-of-round: 0.05 mm (0.0020 in) max.
5. If the diameter is less than the minimum, grind the
journals to match undersize bearings.
Undersize bearing: 0.25 mm (0.010 in),
0.50 mm (0.020 in), 0.75 mm (0.030)
Main journal diameter undersize
Bearing size
59.693-59.711 (2.3501-2.3508)
N o.1,2.4,5
0.25
undersize
No.3 59.687-59.705 (2.3499-2.3506)
59.443-59.461 (2.3403-2.3410)
N o.1,2,4,5
0.50
undersize
No.3 59.437—59.455 (2.3400-2.3407)
59.193-59.211 (2.3304-2.3311)
N o.1,2,4,5
0.75
undersize
59.187-59.205 (2.3302-2.3309)
No.3
1
mm (in)
Journal diameter
1 -5 3