6.
Fit the piston rings on the piston using the
piston ring pliers.
NOTE: Be careful when handling the pistons
to prevent any scratches.
Make sure that the piston rings are fitted in
the correct piston ring grooves and that
"TOP", or the manufacturer indication, faces
up.
7.
Check that the piston ring sliding surface is
not damaged.
Fig. 54
3.6.5 Checking pistons
Procedure
1.
Check the condition of the pistons and piston pins.
See if there are any cracks on the edge of the combustion chamber or on the upper edge of the
piston pin hole.
2.
Replace a damaged piston.
3.
Measure the diameter of the piston.
See the height (H) of the measurement point
in the table.
4.
Replace the piston if needed.
The diameter of the piston must be within
the reference value (D) range.
Engine D (mm) H (mm)
33
44
66
107.883 - 107.897 17.0
49
74
107.893 - 107.907 19.0
84
98
110.863 - 110.877 15.0
Fig. 55
3. Maintenance
3-34 4th Generation Engines
8370 79492
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