Yanmar 4JH4E - Page 344

13. Service standards
324
2) Piston ring
mm
Inspection item Standard limit
Reference
page
3JH4E
4JH4E
Top ring
Ring groove width 2.060-2.075 2.170
5.3.3(1)
5.3.3(2)
Ring width 1.970-1.990 1.950
Side clearance 0.070-0.105 0.200
End clearance (gap) 0.200-0.400 0.490
Second ring
Ring groove width 2.025-2.040 2.140
Ring width 1.970-1.990 1.950
Side clearance 0.035-0.070 0.190
End clearance (gap) 0.200-0.400 0.490
Oil ring
Ring groove width 4.015-4.030 4.130
Ring width 3.970-3.990 3.950
Side clearance 0.025-0.060 0.180
End clearance (gap) 0.200-0.400 0.490
4JH4-TE
4JH4-HTE
Top ring
Ring groove width 2.060-2.080 2.180
Ring width 1.970-1.990 1.950
Side gap (half-keystone) -
End clearance (gap) 0.200-0.400 0.490
Second ring
Ring groove width 2.050-2.065 2.170
Ring width 1.970-1.990 1.950
Side clearance 0.060-0.095 0.220
End clearance (gap) 0.200-0.400 0.490
Oil ring
Ring groove width 4.020-4.035 4.135
Ring width 3.970-3.990 3.950
Side clearance 0.030-0.065 0.180
End clearance (gap) 0.200-0.400 0.490