Piston Pins (3.0L); Connecting Rods Inspection (3.0L) - Mazda B-Series 1997 Workshop Manual

B2
INSPECTION / REPAIR
Piston Pins
1. Measure each piston pin bore diameter in X and Y
directions at four points.
Diameter: 23.1 05-23.1 45mm (0.90964.91 12 in)
2. Measure the piston pin diameter in the X and Y directions
at four points.
Diameter: 23.1 62-23.175mm (0.91 1 9 4 . 9 1 24 in)
I
MBlo32-A 5 ~ ~ 0 ~ 2 . 0 4 0 1
3. Calculate the related piston-to-pin clearance.
Clearance: 0.005-0.01 2mm (0.00024.0005 in}
4. If the clearance exceeds specification, replace the piston
and/or piston pin.
5. Measure the piston pin length.
Length: 76.5-77.2mm (3.01 2-3.039 in)
6. If the length exceeds specifications, replace the piston
pin.
CONNECTING RODS
1. Measure the small end inner bore diameter of each
connecting rod.
Diameter: 23.1 05-23.1 45mm (0.9096-4.91 12 in)
Caution
If the connecting rod is replaced, the connecting
rod cap must also be replaced, since they are a
matched set.
2.
Check the bend and twist factor of the connecting rod.
Bend: 0.04mm (0.0016 in)/25.4mm (1.0 in)
Twist: 0.075mm (0.003 in)/25.4mm (1.0 in)
Length (Center to Center): 140.46-1 40.54mm
(5.530-5.533 in}
3. If either the bend or twist factors exceed the specifica-
tions, replace the connecting rod.