Piston And Piston Pin; Connecting Rod - Mazda MX-5 1990 Workshop Manual

I ,
INSPECTION I REPAIR
B
05UOBX·158
05UOBX·159
05UOBX·162
5. Measure each piston ring end gap with a feeler gauge. Re-
place the piston ring if necessary.
End gap
Top
Second:
Oil rail :
Maximum:
0.15-0.30mm (0.006-0.012 in)
0.1S-0.30mm (0.006-0.012 in)
0.20-0.70mm (0.008-0.028 in)
1.0mm (0.039 in)
Piston and Piston Pin
1. Measure each piston pin hole diameter in X and Y direc-
tions at four points.
Diameter: 19.988-20.000mm (0.1869-0.7874 in)
2. Measure each piston pin diameter in X and Y directions at
four points.
Diameter: 19.987-19.993mm (0.7869-0.7871 in)
3. Calculate the piston pin-to-piston clearance.
Clearance: -0.005-0.013mm (-0.0002-0.0005 in)
4. If the clearance exceeds specification, replace the piston
and/or piston .. pin.
CONNECTING ROD
1. Measure each connecting rod bushing inner diameter.
Diameter: 20.003-20.014mm (0.7875-0.7880 in)
2. Calculate the clearance between the connecting rod bush-
ing and piston pin.
Clearance: 0.010-0.027mm (0.0004-0.0011 in)
3. Measure each connecting rod for bending. Repair or re-
place the connecting rod if necessary.
Bending: 0.075mm (0.0030 in) max.l50mm (1.97 in)
B-57