Chery QQ6 (S21) / S12LHD. Manual — part 219

If disassembled parts can not be repaired or for other processing immediately, store
them properly.
The spare parts can be taken out of their package only when they are to be installed; do
not use the spare parts without package or with package heavily damaged;
When installing an injector, be careful not to damage the O-gaskets at both ends of the
injector; for installation convenience, apply a little lubricant on the O-gaskets.
After fuel and fuel feed systems are disassembled, avoid use of compressed air and
move of the vehicle as best as you can.

(5) Safety precaution
In order to avoid maintenance technical personnel from being injured and fuel injection
and ignition devices from being damaged, please note:

In case the engine is running or under starting speed, disconnection of ignition

harness is forbidden. Checking the engine for poor working of single cylinder by means
of spark test with ignition cable disconnected is not allowed;

if it is required to drag the engine by the starter without starting the engine itself,

for example, in the case of inspection of cylinder pressure of engine etc., disconnect the
harness connectors on engine revolution sensor and camshaft (phase) sensor and
connect each sensor properly after the corresponding job has finished, and then use a
special diagnostic tester for Chery to clear the failure codes in the system;

When the engine is running at high speed, touching wheel train of engine and

revolving parts are forbidden;

When the engine reaches normal operating temperature, both water temperature

and pressure of cooling system are very high; therefore, in case maintenance for the
cooling system of engine is required, perform corresponding operations only after the
engine has stopped and the cooling system has been fully cooled.

When maintaining fuel system of engine, if maintenance for engine compartment

is involved, perform the operations only after temperature inside engine compartment of
the vehicle has adequately fell;

Under a state that power on of the system is normal, do not touch cooling fan of

the engine by hand at any time, because the cooling fan may start up abruptly.

Service Manual for Chery

QQ6

(SQR473F Engine-Mechanical)

After Sales Service Department of Chery

Automobile Sales Co., Ltd

CONTENTS

Chapter One Introduction of Characteristics . . . . . . . . . 4

I. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 4

II. Number Position of the Engine . . . . . . . . . . . . . . . . . . . . . . . 4

III. Connotation of Engine Number . . . . . . . . . . . . . . . . . . . . . . .. 4

Chapter Two Specification . . . . . . . . . . . . . . . ... 6

I. Engine Type and Major Parameters. . . . . . . . . . . . . . . . . . . . . ... 6

II. Major Maintenance Parameters of Engine . . . . . . . . . . . . . . . . . . ... 7

III. Primary Fit Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

IV. Engine Primary Tightening Torque Table . . . . . . . . . . . . . . . . . . . 10

V. The Parts where Lubrication are Required during Assembly of Engine. . . . . . . . 13

VI. The Parts where Rubber Coating are Required during Assembly of Engine . . . . . 15

Chapter Three Special Tools . . . . . . . . . . . . . . .. 16

I. Connotation of Special Tool Number . . . . . . . . . . . . . . . . . . . . .. 16

II. Special Tools Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Chapter Four Measurement of Cylinder Pressure. . . . . . ... 20

I. Detection of Cylinder Pressure . . . . . . . . . . . . . . . . . . . . . . . 20

1. Measuring process . . . . . . . . . . . . . . . . . . . . . . . . . .. 20

2. Judgment of cylinder pressure value. . . . . . . . . . . . . . . . . . ... 21

Chapter Five Disassembly of Power-assisted Steering System. ... 22

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 22

II. Overhaul. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

III. Installation of the Steering Pump. . . . . . . . . . . . . . . . . . . . . .. 23

Chapter Six Disassembly of A/C Compressor . . . . . . . . 24

II. Overhaul of Compressor . . . . . . . . . . . . . . . . . . . . . . . . . 25

III. Installation procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 25

Chapter Seven Disassembly of Generator . . . . . . . . . .. 25

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 25

II. Overhaul of Generator. . . . . . . . . . . . . . . . . . . . . . . . . . 26

III. Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . ... 26

Chapter Eight Replacement of Engine Timing Belt. . . . . . 27

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 27

II. Installation of Timing Belt . . . . . . . . . . . . . . . . . . . . . . . . . 29

III. Adjustment of Timing (general overhaul) . . . . . . . . . . . . . . . . . . . 30

IV. Adjustment of Timing (minor overhaul) . . . . . . . . . . . . . . . . . . ... 30

Chapter Nine Disassembly of Engine Assembly . . . . . . . 31

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 31

II. Installation Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Chapter Ten Disassembly of Intake Manifold . . . . . . . . 39

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 39

Chapter Eleven Disassembly of Cylinder Head. . . . . . . .. 40

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 40

II. Overhaul of Cylinder Head System. . . . . . . . . . . . . . . . . . . . . 43

III. Assembly of Cylinder Head Assembly . . . . . . . . . . . . . . . . . . . . 45

Chapter Twelve Disassembly and Installation of Oil Pump and

Lubrication System . . . . . . . . . . . . . . . . . . 48

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 48

II. Overhaul of Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . 50

III. Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . ... 50

Chapter

Thirteen

Disassembly

of

Crank-Connecting

Rod

Mechanism. . . . . . . . . . . . . . . . . . . . . . 51

I. Disassembly Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . 51

II. Overhaul of Crank-Connecting Rod System. . . . . . . . . . . . . . . . . .. 52

III. Installation of Crank-Connecting Rod System . . . . . . . . . . . . . . . . . 56