DL06K Interim Tire-4 Diesel Engine Disassembly and Reassembly of Major Components
87
2) Piston rings
a) Visual check
z Replace the piston rings with new ones if detected worn or broken when the
engine is overhauled.
b) Piston ring gap
z Insert the piston ring into the upper
portion of the cylinder liner bore so
that it is held at a right angle to the
cylinder liner wall.
z Measure the piston ring gap with a
feeler gauge.
(mm)
Standard Limit
1st ring 0.30 ~ 0.45 1.5
2nd ring 0.60 ~ 1.80 1.5
Oil ring 0.25 ~ 0.45 1.5
c) Piston ring side clearance
z Fit the compression ring and oil ring in the piston ring groove.
z With a feeler gauge, measure side
clearance of each ring, and replace
either the ring or piston if the
measured value is beyond the
specified limit.
(mm)
d) Piston ring tension
z With a tension tester, measure piston ring tension. Replace the piston ring if the
measured value is beyond the limit.
Standard Limit
1st ring - -
2nd ring 0.05 ~ 0.09 0.15
Oil ring 0.03 ~ 0.07 0.15
Standard
1st ring 1.47 ~ 2.21 kg
2nd ring 1.49 ~ 2.23 kg
Oil ring 4.08 ~ 5.52 kg
EH6OM044
Feeler gauge
EE2OM118
Feeler
gauge
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