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Chery QQ Service Manual
Mechanical Part of SQR 472Engine
6-44
4 Routine Inspection
4.1 Cylinder Body
4.1.1 Inspect the top surface of cylinder body for its
flatness
(1)
Measure at the six points shown in the right figure
with a ruler and a feeler gauge.
Limit
:
0.08mm
4.1.2 Use of bore gauge
Measure the cylinder bore at the positions as indicated in
the right figure with a bore gauge, and figure out the
difference between the maximum value and the miximum
value. If the difference exceeds the limit, repair or replace
the cylinder.
Limit
:
0.03mm
[Reference] Roundness:
A-B or a-b
Cylindric degree: A-a or
[Reference] Standard
diameter
of
cylinder:
φ
72.00-72.01mm
4.2 Piston
4.2.1
Inspect the piston pin hole for its clearance
Measure the piston pin at several positions with a
micrometer caliper shown in the figure, make the
maximum value as the diameter of pin.
4.2.2
Measure the diameter of piston pin at several
positions with an inner-diameter dial gauge as shown in the
figure, make the minimum value as the diameter of the pin
hole.
Work out the clearance with the difference between the
pin diameter and pin hole diameter, if the difference is
beyond the standard value, replace the piston pin or piston.
Standard value
: 0.004-0.009mm
Limit
: 0.015mm
Upper Stopper Position of Piston
Lower Stopper Position of Piston
Measurement
Position
of
Piston Pin
Summary of Contents for Vyper 4WD 1100cc 4 seater XY1100UEL
Page 1: ...Service Manual 4 4 GIO MOTORS Vyper 4WD 1100cc Vyper 4WD 1100cc 4 seater ...
Page 65: ...4 COOLING SYSTEM 4 6 Cooling System Chart 4 ...
Page 175: ...11 EFI SYSTEM OF SQR 472ENGINE 11 3 3 The ECU control principle diagram ...
Page 176: ...11 EFI SYSTEM OF SQR 472ENGINE 11 4 4 The ECU function module layout ...
Page 258: ...12 LIGHTING AND SWITCHES 12 7 2WD 4WD 4WD Diff Lock Switch No continuity Change the switch ...
Page 260: ......
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