DV11
Operation and Maintenance
87
Measurement and Inspection of Major Parts
Printed in Mar. 2005 PS-MMA0608-E1A
c) Piston ring and ring groove
z In case of piston ring's wear,
damage or engine overhaul,
replace piston rings.
d) Piston ring cut part clearance
z Measure the piston ring cut part.
z Insert the piston ring at the
cylinder liner's upper part
perpendicularly.
z With a feeler gauge, measure
the gap clearance of piston ring.
z If the measured value exceeds
the limit value, replace it
Standard Limit
Top ring
0.35 ∼ 0.55 mm
1.5 mm
2nd ring
0.80 ∼ 0.95 mm
1.5 mm
Oil ring
0.40 ∼ 0.70 mm
1.5 mm
e) Piston side clearance
z Assemble the piston ring at the
piston.
z Measure the each ring's side
clearance and if the measured
value exceeds the limit value,
replace rings or piston.
Standard Limit
Top ring
0.105 ∼ 0.155 mm
0.20 mm
2nd ring
0.050 ∼ 0.085 mm
0.15 mm
Oil ring
0.030 ∼ 0.070 mm
0.15 mm
Feeler gauge
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