Inspection

INSPECTION

PISTON RING

1. Check the piston ring for damage, excessive wear, and breakage. Replace if defects are evident. If the piston has been replaced, the piston rings must also be replaced.





2. Check for clearance between the piston ring and ring groove. If it exceeds the limit, replace the ring or piston, or both.
Standard value:

Number 1: 0.03 - 0.07 mm (0.0012 - 0.0028 inch)
Number 2: 0.02 - 0.06 mm (0.0008 - 0.0024 inch)
Limit: 0.1 mm (0.003 inch)






3. Insert the piston ring into the cylinder bore. Force the ring down with a piston, the piston crown being in contact with the ring, to correctly position it at right angles to the cylinder wall. Then, measure the end gap with a feeler gauge.
If the ring gap is excessive, replace the piston ring.
Standard value:

Number 1: 0.15 - 0.30 mm (0.006 - 0.012 inch)
Number 2: 0.28 - 0.43 mm (0.011 - 0.017 inch)
Oil: 0.10 - 0.40 mm (0.003 - 0.015 inch)
Limit:

Number 1, Number 2: 0.8 mm (0.03 inch)
Oil: 1.0 mm (0.03 inch)


CRANKSHAFT PIN OIL CLEARANCE [PLASTIGAGE METHOD]

1. Remove oil from the crankshaft pin and the connecting rod bearing.





2. Cut plastigage to the same length as the width of the bearing and place it on the pin, parallel with its axis.
3. Install the connecting rod cap carefully and tighten the nuts to the specified torque.
4. Carefully remove the connecting rod cap.





5. Measure the width of the plastigage at its widest part by using a scale printed on the plastigage package.
Standard value: 0.03 - 0.06 mm (0.0012 - 0.0023 inch)
Limit: 0.1 mm (0.003 inch)