Engine

Size of intake valve seat ring and cylinder head
seat ring bore
Class
Diameter of
intake
valve seat
ring (unit:
mm)
Diameter of
the seat ring
bore of
cylinder
head (mm)
Interfer
ence
(mm)
Standard
43.877
01.0
01.0
+
−
43.763
025.0
0
+
Oversized
0.5
44.377
01.0
01.0
+
−
44.263
025.0
0
+
Oversized
1.0
44.877
01.0
01.0
+
−
44.763
025.0
0
+
0.079
—
0.124
Size of exhaust valve seat ring and cylinder head seat ring bore
Class
Diameter of exhaust valve
seat ring (mm)
Diameter of cylinder head
seat ring bore (mm)
Interference
(mm)
Standard
38.877
01.0
01.0
+
−
38.263
025.0
0
+
Oversized
0.5
39.377
01.0
01.0
+
−
38.763
025.0
0
+
Oversized
1.0
39.877
01.0
01.0
+
−
39.263
025.0
0
+
0.079—0.124
UAES’s
new
two-valve
38.377
01.0
01.0
+
−
38.263
025.0
0
+
Oversized
0.5
38.877
01.0
01.0
+
−
38.763
025.0
0
+
Oversized
1.0
39.377
01.0
01.0
+
−
39.263
025.0
0
+
0.079—0.124
Size of valve guide and valve guide bore
Class
Valve guide bore
(unit: mm)
Diameter of cylinder head
guide hole (unit: mm)
Interference
(unit: mm)
Standard
13.555
0
01.0−
13.481—13.519
Oversized
14.305
0
01.0−
14.231—14.269
Oversized
14.505
0
01.0−
14.481—14.519
0.026—0.07
A-16
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