Chery QQ6 (S21) / S12LHD. Manual - part 85
No.
Name
Dimension and tolerance
Fit clearance
Diameter of cylinder head third bearing hole
( )
021
.
0
0
7
24
+
H
φ
+0.074
Diameter of camshaft fourth journal
( )
040
.
0
053
.
0
6
24
−
−
e
φ
18
Diameter of cylinder head fourth bearing hole
( )
021
.
0
0
7
24
+
H
φ
+0.040～
+0.074
Diameter of camshaft fifth journal
( )
040
.
0
053
.
0
6
24
−
−
e
φ
19
Diameter of cylinder head fifth bearing hole
( )
021
.
0
0
7
24
+
H
φ
+0.040～
+0.074
20
Camshaft thrust groove width
( )
025
.
0
0
7
65
.
30
+
H
+0.15～+0.20
Outside diameter of camshaft oil seal
4
.
0
2
.
0
50
+
+
φ
21
Diameter of cylinder head oil seal hole
( )
025
.
0
0
7
50
+
H
φ
-0.005～
-0.40
Diameter of cylinder head jib hole
( )
024
.
0
006
.
0
7
12
+
+
G
φ
22
Outside diameter of hydraulic jib
φ12-0.011
+0.006～
+0.035
Diameter of crankshaft timing gear segment
Φ28f7
23
Bore diameter of crankshaft timing gear
φ28＋0.030
Key groove dimension of crankshaft timing gear
5
＋
0.030
Key groove width of crankshaft gear
5
＋
0.030
24
Semicircular key width
5
0
-0.030
0~0.06
25
Bore diameter of crankshaft pulley
φ74
+0.046
26
Outside diameter of timing gear
φ74
-0.05
-0.08
0.096~0.126
III. Primary Fit Clearance
Name
Fit Clearance
Axial clearance of crankshaft
0.07～0.265mm
Axial Clearance of Camshaft
0.15～0.20mm
Axial clearance of connecting rod
0.15～0.4mm
Fit clearance of connecting rod bearing
0.023～0.058mm
Fit clearance of main bearing
0.035～0.075mm
Fit clearance between intake valve stem and valve
0.012～0.043mm