Chery SQR372 Manuale utente
SQR7080 Maintenance Manual 372 Engine Mechanical System
Chery Automobile Co., Ltd
1
SQR372 Engine
Maintenance Manual
Chery Automobile Co., Ltd.
Forewords
In order to help the technical servicing personnel to have correct understanding and good command of the
cute Chery Model SQR7080 vehicle, and to master the skills for fast repairs and rational maintenance, a
special edition of the “Chery QQ Technical Service Manual—372 Engine Mechanics Division” is
compiled and published.
This Manual gives a detailed description on the dismounting, installating, checks and tests, adjustments
and diagnoses, technical standards and specifications for adjustments and diagnoses of various parts and
components as well as subsystems of Chery QQ 372 engines. This Manual is published by Chery
Automobile Co., Ltd.
Any parts or sections of this Manual shall not be copied or duplicated in whatever form or by whatever
approach without the written authorization of the publisher.
The right of interpreting the Manual belongs to the Service Department of Chery Car Marketing Co. Ltd
Editors
March of 2004
3、Special tools for maintenance:
Outer appearance Code and Name Purpose
Auxiliary devices for engine
dismounting and checks
Mounting onto engine
dismounting and check
stand
Engine dismounting and check stand Dismounting and
installing engine
Clockwise belt wheel wrench Camshaft clockwise
belt wheel dismounting
Ｓ
Spring bush pulling and removing
device
Installing crankshaft
oil seal
SQR7080 Maintenance Manual 372 Engine Mechanical System
Chery Automobile Co., Ltd
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Throttle locking block removal
device
Auxiliary tools
Dismounting and
installation of throttle
spring locks
Flying wheel fixture
Dismounting and
installation of
crankshaft
Throttle guiding pipe punch
Removing and
installation of throttle
guiding pipe
Shaft oil seal replacer
Ｓ
Ｔ
Oil seal stand screw driver
Outer appearance Code and Name Purpose
Crankshaft belt wheel fixture Remove and install
crankshaft belt wheel
Wrench
Remove and install
can shaft slave gear
wheel
Replace throttle
spacing, adjust spacing
washer
SQR7080 Maintenance Manual 372 Engine Mechanical System
Water pump pulley assembly
wrench water pump Assembly
Measuring
tools
Feeler, gap gauge, caliper, ruler, cylinder gauge, gap ruler, pressure meter, torque
wrench
Tool Piston ring dismounting device
Oils Engine lubiricating oil, adhesion agents
Chapter 2 Timing Blet Service
1. Configuration diagram
1 Water pump pulley
2 Timing belt cover
3 Timing belt
4 Torsion shock absorber
5 Timing pulley damper
6 Tensioner
7 Crankshaft timing pulley
※ ：Non-reusable part
Unit：N·m(kg·cm)
Chery Automobile Co., Ltd
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SQR7080 Maintenance Manual 372 Engine Mechanical System
Remove torsional vibriation damper.
Remove water pump pulley.
Remove the water pump pulley according to the
illustration.
Remove with SST,if there are any.
Please remove with screwdriver and wrench
accordingly,if there is no SST at hand.
SST
Remove torsional vibriation damper
(1) Prevent the gear ring from rotating with SST.
(2) Remove bolt of torsional vibriation damper.
图29
Chery Automobile Co., Ltd
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SQR7080 Maintenance Manual 372 Engine Mechanical System
Remove timing cover cap
Torque: 6±1N.m
Remove timing pulley damper
Remove the tensioner
（１）Carry out the operation at the upper thrust point
of compression of the first cylinder piston
(2) After removing the timing cover cap,turn the bolt
and rotate the timing gear clockwise with wrench,align
timing mark of camshaft timing gear with the cam
mark of camshaft cover cap;
Attention: You can rotate the engine clockwise
only,after installing the pulley;
Before removal,make a arrow mark on the position of
timing mark,assemble according to original state.
(3) Make sure that the crankshaft timing pulley wheel
mark is aligned with the mark of the oil pump.
(4) Remove the tensioner bolt, and take off the
tensioner
Do“mark”
Timing mark
Clockwise
Timing mark
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SQR7080 Maintenance Manual 372 Engine Mechanical System
Remove the timing belt.
[Caution] It is absolutely not allowed to use screw
driver or some other sharp-edged tools to remove the
belt.
Attention: Pay Attention to the following points while
using timing belt:
- Don’t bend the belt even at a small angle,otherwise
it will result in rope fracture inside the belt.
- - Service life of belt is short,don’t pollute the belt
with grease and water.
- You have no choice but rotate the engine
clockwise after installing the belt.
2.7 Remove the crankshaft timing gear
Chery Automobile Co., Ltd
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SQR7080 Maintenance Manual 372 Engine Mechanical System
1 Make careful and detailed checks on the timing belt. Replace with new parts if any of the
conditions shown in the figure occurs.
（１）、Cracks on the back side rubber;
（２）、Cracks of teeth roots, cracks clearing off the fabric lining layer;
（３）、Tears and wears of fabric lining layer, missing rear teeth, broken teeth, etc.
（４）、Abnormal tears and wears on belt sides
Chap
Chap
Tears and
wears
Drop-off
of belt core
MIS
Abnormal
tears and wears
Chery Automobile Co., Ltd
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SQR7080 Maintenance Manual 372 Engine Mechanical System
1 Even if the damages on the outer appearance can not be confirmed, the belt should be replaced
under any of the following circumstances:
（１）、If the water in the water pump is leaked, which makes it necessary to refill the water
continuously;
（２）、There are much oil stains on the belt, the belt should be replaced for the rubber will be
damaged when it is expanded;
Specifications and model of the timing belt
Model 372-1007081
Belt wide ２５.3mm
Timing belt tensioner
Turn the belt tensioner supporting stand bolts to see if there are any abnormal sounds. Check to see if
there are any damages on the contacting surface of the belt.
Specifications and model of the timing belt tensioner
Model 372-1007030
Wide ２７．０mm
Outside diameter φ50mm
Check to see if there are any damages on the outer appearance
Specifications and model of clockwise pulley
ＥＦ
Model
Item ＧＬ、ＺＬ、ＧＳ、ＺＳ
Diameter of camshaft timing
gear （mm）
φ110.7
+0.1-0.2
Diameter of crankshaft timing
gear （mm）
φ54.65
+0.7-0.13
2-3-4
Baffle of crankshaft timing gear
Check to see if there is any deformation
Standard size of crankshaft clockwisewheel：
Wide 28.6mm
Chery Automobile Co., Ltd
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SQR7080 Maintenance Manual 372 Engine Mechanical System
Chery Automobile Co., Ltd
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Installation
1 Installation of crankshaft timing gear
2 Installation of timing belt
(1)On the upper thrust point of the first cylinder
compression
① Place the camshaft timing gear around the front
end of the air exhaust camshaft so as to make the
positioning groove on the gear be aligned with the
positioning pin on the end surface of the camshaft.
Then use screws to fix the clockwise gear, with the
torque of 100 ± 5N.m.
(2) Make sure that the punched mark on the
crankshaft clockwise pulley is aligned with the mark
of the oil pump.
（3）Install timing pulley accordingly.
Timing mark
Timing mark
Timing mark
Clockwise
SQR7080 Maintenance Manual 372 Engine Mechanical System
Chery Automobile Co., Ltd
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3 Install the tensioner
（１）Adjust the tension of the timing belt
As shown in the figure, make the space between the①
edge of the stretching wheel and the water pump case
arc to be about 8mm;
Tig②hten the bolt of the stretching wheel with a
torque of 25 ± 3N.m. Use a screwdriver to swing the
stretcher toward the right..
③Turn the crankshaft for two circles towards the
engine rotating direction, so that the camshaft pulley
and the crankshaft pulley matches the clockwise marks
respectively.
④Use hands to press down for about 5mm. The force
for pressing the clockwise belt is about: ［Referrence］
20～30 N
Notice: When the deflection of the timing belt fails to
meet the specifications, the key is to adjust the
above-mentioned stretcher fastening bolt by widening
the spacing.
Tighten the S/A fixing bolt of the stretcher with the
specified torque of 25 ± 3N.m
4 Install the baffle of the crankshafte timing pulley
[Attention] Install the baffle towars the direction
shown in the right figure.
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