gio Vyper 4WD 1100cc 4 seater XY1100UEL, Руководство по обслуживанию

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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