Chery QQ - Fit Clearance between Connecting Rod Body Hole and Bolt Bar; Fit Clearance between Connecting Rod Cover Hole and Bolt Bar; Radial Clearance of Camshaft Bearing; Fit Clearance between Tappet Hole and Tappet

Chery QQ Service Manual Mechanical Part of SQR 472Engine
51
Piston Pin
φ18
001.0
005.0
-
-
6 Fit Clearance between Connecting Rod Body Hole and Bolt Bar
Name of Component Size and Tolerance Clearance or Value of
Interferenc
Remark
Connecting rod body hole
φ8.08 H
7
015.0
0
+
The hole should be processed along
with the connecting rod body.
Bolt Bar
φ8.08 S
6
032.0
023.0
+
+
Value of Interferenc
0.008~0.032
7 Fit Clearance between Connecting Rod Cover Hole and Bolt Bar
Name of Component Size and Tolerance Clearance or Value of
Interferenc
Remark
Connecting rod cover hole
φ8.08 H
7
015.0
0
+
The hole should be processed along
with the connecting rod body.
Bolt bar
φ8.08 f
6
005.0
014.0
-
-
Clearance
0.005~0.029
8 Radial Clearance of Camshaft Bearing
Name of Component
Size and Tolerance Clearance or Value of
Interferenc
Remark
Cylinder Head
φ26H
7
021.0
0
1
st
bearing cap
Camshaft
φ26f
6
020.0
033.0
-
-
Clearance
0.020~0.054
1
st
bearing cap
Cylinder Head
φ23H
7
021.0
0
2
nd
, 3
rd
, 4
th
& 5
th
bearing caps
Intake
Camshaft
φ23f
6
020.0
033.0
-
-
Clearance
0.020~0.054
2
nd
, 3
rd
, 4
th
& 5
th
bearing caps
Cylinder Head
φ29H
7
021.0
0
1
st
bearing cap
Camshaft
φ29f
6
020.0
033.0
-
-
Clearance
0.020~0.054
1
st
bearing cap
Cylinder Head
φ23H
7
021.0
0
2
nd
, 3
rd
, 4
th
& 5
th
bearing caps
Exhaust
Camshaft
φ23f
6
020.0
033.0
-
-
Clearance
0.020~0.054
2
nd
, 3
rd
, 4
th
& 5
th
bearing caps
9 Fit Clearance between Tappet Hole and Tappet
Name of Component Size and Tolerance Clearance or Value of
Interferenc
Remark
Cylinder Head Hole
φ28H
7
021.0
0
Tappet
φ28f
6
020.0
033.0
-
-
Clearance
0.020~0.054