Chery A18. Manual — part 28

SAFETY PRECAUTIONS OF SYSTEM MAINTENANCE

SAFETY PRECAUTIONS IN DIAGNISIS AND MAINTENANCE OF THE
GASOLINE INJECTION ELECTRONIC CONTROL SYSTEM

(1) Removal/installation requirements of controller

The battery negative grid must be disconnected first, followed by the removal of
controller prior to carrying out electric welding or baking finish;

In removing/installing the controller, the ignition switch must be turned to “OFF”
position to avoid being damaged;

The power supply wire should not be removed from the battery while the engine is
running or the electrical system is in operation;

Don’t start the engine with high current of charger;

Pay attention to keep the ambient temperature around controller less than 80

.

℃

(2) Cleanliness requirements: following rules shall be complied strictly before

operating the fuel supply system and fuel injector system:

All the dismantled parts must be placed in clean environment and covered properly. It
is not allowed to use the fiber-sloughing cloth.

(3) All the wiring harness and the same for diagnostic tester can only be disconnected

or connected after the ignition switch has been turned off;

Ensure the wiring connection is correct before carrying out the voltage or grounding
measurement for the electronic control system.

Remove the power supply wire from battery or disconnect the wiring harness
controller connectors will cause the loss of diagnostic information and memory.

(4) Notes for maintaining the fuel supply system:

Attention must be paid to the followings when removing and installing the fuel pump
on a fully or semi-fully filled fuel tank:

A device that can fully absorb the potential leaked fuel should be available near the
fuel tank opening before carrying out the operation;

Avoid the skin come into direct contact with fuel;

Thoroughly clean the place and around it before loosening the connecting parts;

Put rags around the connecting parts in order to prevent the fuel from spraying via the
loosened part;

The disassembled parts that are not intended to be repaired immediately should be
covered or closed carefully;

The spare parts should be taken out from its packing only before the assembly. Any
part without proper packing is not allowed to be used;

Pay attention not to damage the O ring while assembling the fuel injector. A small
amount of lubricating oil should be applied on the O ring for assembly convenient.

After the system has been opened up, as far as possible not to use compression air and
move the car around.

SAFETY MEASURES

Attention should be paid to the followings so as to avoid the injury of personnel and
damage of the fuel injectors and the ignition device:

(1) If the engine is running or at the start up speed, then it is not allowed to contact or

disconnect the ignition wiring harness;

(2) If the engine is driven by the starting motor instead of starting by itself, such as in

the case of inspecting the compression pressure, then the wiring harness
connectors should be disconnected from the Hall Sensor and crankshaft position
sensor.

ENGINE

LOCATION INDEX … … … … … … … … … … … … … … … … … … . . A-3

MECHANICAL LOCATION INDEX … … … … … … … … … … … … . A-3

ENGINE TIMING… … … … … … … … … … … … … … … … … . . . A-4

TOP AND BOTTOM TIMING GEAR COVER ASSEMBLY . … . . A-4

TIMING BELT REMOVAL . … . … . … . … . … . …A-4

TIMING BELT INSTALLATION AND ALIGNMENT … . … . … . A-5

DRIVER BELT, TENSION PULLEY AND GENERATOR … . … . … …A-7

DETERMINATION OF ENGINE TIMING（TDC FOR CYLINDER 1）… . …A-7

VALVE CLEARANCE … . … . … . … . … . … . … . …A-9

VALVE MECHANISM COMPONENTS … . … . … … … … … … … …A-9

VALVE COVER AND GASKET… . … . … . … . … . … …A-10

ROCKER MECHANISM … . … . … . … . … … … . …A-11

HYDRAULIC TAPPET … . … . … . … . … . … . … …A-12

V A L V E , V A L V E S P R I N G A N D O I L S E A L A S S E M B L Y O F T H E

V

A

L

V

E

…

…

A

-

1

3

COMPRESSION PRESSURE … … . … . … . … . … . … . A-17

COMPRESSION INSPECTION … . … . … . … . … . … …A-17

CYLINDER HEAD GASKET … … . … . … . … . … . … . A-19

CYLINDER HEAD GASKET REPLACEMENT … . … . … . … …A-19

FRONT OIL SEAL … … . … . … . … . … . … . … . …A-21

CRANKSHAFT PULLEY … . … . … . … . … . … . … A-21

CRANKSHAFT GEAR … … … … . … . … . … . … . … …A-22

FRONT OIL SEAL REPLACEMENT … … . … . … . … . … …A-22

FLY WHEEL REMOVAL AND INSTALLATION … … … … … … … … . A-23

REAR OIL SEAL REPLACEMENT … . … . … . … . … . A-23

CAMSHAFT … … . … . … . … . … . … . … . … . A-25

CAMSHAFT GEAR … . … . … . … . … . … . … … …A-25

CAMSHAFT AND CAMSHAFT THRUST SPACER … . … . … . …A-25

SIZE OF CAMSHAFT JOURNAL AND HOLE OF THE CYLINDER HEAD … A-27

CRANKSHAFT … … . … . … . … . … . … . … . … …A-28

CRANKSHAFT, CRANKSHAFT THRUST SPACER，

BEARING SHELL AND MAIN BEARING CAP … … … … … … . … … …A-28

PISTON AND CONNECTING ROD ASSEMBLY … … . … . … . …A-33

PISTON REMOVAL, MEASURE AND INSTALLATION … . … . … …A-33

INSTALLATION OF THE PISTON AND CONNECTING ROD ASSEMBLY … A-38