Engine

Measure the axial clearance of piston ring in the piston groove
Height of the piston
ring (unit: mm)
Size of piston ring
groove (unit: mm)
Fit clearance
(unit: mm)
First compression ring
1.60 1.6
0.050-0.082
Second compression
ring
2.0 2.0
0.050-0.082
0.61±0.025
Sealing strip of oil ring
Spring of oil ring
2.68±0.05
4.0
0.01-0.23
Cast iron oil ring
4.0 4.0
0.025-0.055
480 UAES’s new two-valve
Height of the piston ring
(unit: mm)
Size of piston ring groove
(unit: mm)
First compression
ring
1.2（-0.03～-0.01） 1.2（0.03～0.05）
Second
compression ring
1.5（-0.03～-0.01） 1.5（0.02～0.04）
0.46±0.02
Sealing strip of
oil ring
Spring of oil ring
2.75±0.05
2.0±0.02
3（0.01～0.03）
Measure the small-end bore diameter of the
connecting rodΦ20.589
Check whether the big-
end injection hole of the
conn
ecting rod is blocked, with the outlet
diameter to be Φ1mm.
0
-
0.012
0
-
0.012
-0.015
-
0.025
+0.03
+
0.01
+0.03
+0.01
+0.06
+0.04
+0.06
+0.04
A-36
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