Chery A18. Manual — part 4

the expansion reservoir descends quickly, coolant
should be injected up to the highest position to cut
down the air circulation in the system.

――To shut the engine down to have it fully cooled（if

possible, leave the engine alone for one night.）;

――To open the pressure cap to check the coolant level, and

inject coolant up to the highest position.

Cooling System Checkup:
――To check the coolant level, start up the engine and

preheat it. Put the engine under idle speed
circumstance until the cooling fan runs, and check
if coolant leakage exists at various pipe joints. Shut
down the engine and wait for engine cooling. And
then check if the coolant level in the expansion
reservoir is at normal condition.

――To try best to prevent the coolant spilling from

scalding operator during checkup.

――To timely check if water flows into the engine oil

pan (the lubricating oil shall become milk white
after water flows) when no pipe leakage is found
and the expansion reservoir is short of coolant, and
timely stop water from flowing in when finding it.

COOLING SYSTEM MAINTENANCE WARNING

Warning:

·To try best not to move radiator cap or loose the radiator discharging plug when the engine

is under operation or the engine and radiator are at a very high temperature. Scorching
coolant may spill out, hurting the people and damaging the engine and cooling system.

·To shut down the engine until it cools down, and then carefully demount the radiator cap.

Meanwhile, wrap a large thick cloth onto the radiator cap, rotate it slowly to the position
of the first clip along the counter-clockwise direction and then release the pressure slowly.

·To use a cloth to push down the radiator cap, rotate and remove the radiator cap after the

operator ensures all the intensity of pressure has been released.

WATER PUMP

Structure:

1—Water pump housing

2—Water pump impeller

3—Water pump gear

4—Water pump shaft bearing

5—Water pump seal (ceramics-lead)

Disassembly:

——To disconnect the negative terminal of battery;

——To discharge engine coolant (refer to the coolant

discharge process);

——To disconnect poly V-belt and power pump belt;

——To demount timing shield;

——To unscrew and take 4 bolts out of the front side of

cylinder block.

——To demount the water pump assembly;

——To demount the water pump gasket.

Assembly:

——To install the new gasket on the water pump;

——To install the water pump assembly in the cylinder

block and screw up 4 fixing bolts by hand, and
then screw up to 7.0—10.0Nm;

——The water pump impeller installed in the cylinder

block should be able to rotate freely;

——To refill engine coolant;

——To check leakage occurrences of engine coolant.

Note: Because water pump assembly can not be
repaired, it should be replaced when seal ring or bearing
is worn and torn.

Tightening Torque

Gasket

THERMOSTAT

Disassembly:

——To unscrew 3 M6×40 bolts and then demount the

bolts;

——To demount thermostat chassis and thermostat

assembly.

——To pry out the spring clamps by using chisel or

screwdriver.

——To take the thermostat out;

——To clean up the thermostat;

——To take the seal ring out, and replace it if it being

worn and torn.

——To demount the gasket from the thermostat chassis.

（To replace with new gasket if it is worn and
torn, and allow no repeated use.）

——To measure the thermostat opening temperature

under hot water.

Assembly:

——To clamp the thermostat and then put the gasket

into the thermostat aperture.

——To install thermostat (the side with spring facing

outward).

——To embed spring clamp to ensure the clip within

the thermostat chassis slot;

——To mount new gasket onto thermostat chassis;

——To mount the thermostat chassis and thermostat

assembly into the aperture at the rear side of engine
cylinder head, and screw up the bolt by hand to
9—12N.m.