Chery QQ Service Manual
Mechanical Part of SQR 472Engine
6-50
Chapter 3. Table of Main Fit Clearance for SQR472 Engine SQR472
1
Clearance between Cylinder Hole and Piston Skirt (Piston to Cylinder Clearance)
Name of Component
Size and Tolerance
Clearance or Value of
Interferenc
Remark
Cylinder hole
φ
72
01
.
0
0
+
Group X:
72
0.005
0
F
Group S:
72
0.01
0.005
F
Piston skirt
φ
72
015
.
0
025
.
0
-
-
Divided into two groups:
Clearance for group X:
0.019mm
～
0.03mm
Clearance of group S:
0.018mm
～
0.029mm
2
Clearance of Crankshaft Main Bearing
Name of Component
Size and Tolerance
Clearance or Value of
Interferenc
Remark
Crankshaft main journal
φ
42h
6
–
0
。
016
Bearing bushing
2
0
0.006
-
Bore of cylinder main bearing
φ
46F
6
041
.
0
025
.
0
+
+
Clearance 0.025~0.069
3
Clearance of Crankshaft Connecting Rod Bearing
Name of Component
Size and Tolerance
Clearance or Value of
Interferenc
Remark
Crankshaft connecting rod
journal
φ
37h
6
0
016
.
0
-
Bearing bushing
1.5
0
006
.
0
-
Bore of connecting rodbig
end bearing
φ
40F
6
041
.
0
025
.
0
+
+
Clearance 0.025~0.069
4
Clearance between Piston Pin and Piston Pin Hole
Name of Component
Size and Tolerance
Clearance or Value of
Interferenc
Remark
Piston Pin Hole
φ
18
007
.
0
002
.
0
+
+
Piston pin
φ
18
001
.
0
004
.
0
-
-
Divided into twogroups
Clearance for group A:
0.004 mm
～
0.0085mm
；
Clearance for group B:
0.0045mm
～
0.009 mm
Notice: When installed
with hand, the piston pin
may pass through the
piston pin hole smoothly
without
any
obvious
obstruction, otherwise the
piston
pin
should
be
replaced.
5
Inteference between Piston and Small End of Connecting Rod
Name of Component
Size and Tolerance
Clearance or Value of
Interferenc
Remark
Connecting rod small end
hole
φ
18
026
.
0
044
.
0
-
-
Value of Interferenc
0.021~0.043
Summary of Contents for 1100 GKE OutLaw
Page 1: ...Service Manual 1100GKE 4 4...
Page 62: ...4 COOLING SYSTEM 4 6 Cooling System Chart...
Page 158: ...10 CVT TRANSMISSION SYSTEM 10 7 5 Appearance installation dimension map Fan shaped array 10...
Page 165: ...11 EFI SYSTEM OF SQR 472ENGINE 11 3 3 The ECU control principle diagram...
Page 166: ...11 EFI SYSTEM OF SQR 472ENGINE 11 4 4 The ECU function module layout...
Page 260: ......
