Chery QQ6 (SQR473F Engine-Mechanical). Service Instruction — part 3

5.3 Use a 10mm sleeve to remove the fixing bolt of

discharging tube of water pump and then pull out the

discharging tube.

Note: in case the O-ring on discharging tube of water

pump is loose, broken or aging, be sure to replace.

5.4 Use a 10mm sleeve to remove the fixing bolt of

water pump and then take out the water pump assembly;

when removing, be careful not to damage cushion of the

water pump, if damaged, replace with a new one. The

water pump can not be decomposed to maintain.

5.5 Check water seal of the water pump for water leak; if

water pump bearing is loose, replace the assembly.

Follow the order adverse to that for disassembly of the

water pump to install it.

5.6 Disassembly and installation of thermostat

5.7 Use a caliper to take off the clamps on the two

discharging tubes and then pull out the rubber hoses.

5.8 Use a 10mm sleeve to remove the fixing bolt of

thermostat cover and then take out the thermostat.

5.9 Use a 10mm socket wrench to remove the thermostat

seat. Be careful not to damage the thin sheet gasket.

6. Inspection of thermostat:

(1) Under normal temperature, inspect seating status of

the valve and it should tightly seat.

(2) Inspect opening temperature and maximum stroke of

the valve.

Opening temperature of the valve is 87±2℃

Maximum stroke of the valve is 8mm

Full opening temperature of the valve is 104℃

(3) Then check if the valve closes at the temperature

5

lower than the opening t

℃

emperature. If not

compliant, replacement with a new thermostat is

required. Follow the order adverse to that for

disassembly of the thermostat to install it. When

installing, check if the gasket of the thermostat is

damaged, if thermostat seat and thermostat cover

casing plane are satisfactory. Check the sealing

gasket for damage, if damaged, replace with new

sealing element.

7. Disassembly of A/C pipeline

See Disassembly of A/C Compressor for disassembly

of A/C pipeline.

8. Disassembly of power-assisted steering pipeline.

See Disassembly of Power-assisted Steering Oil Pump

for disassembly of power-assisted steering pipeline.

9. Disassembly of intake and exhaust manifold.

9.1 Use a 10# sleeve to remove the fixing bolt of air

intake pipe.

9.2 Use a cross-head screwdriver to loosen the clamp

connecting intake hose and electronic throttle body.

9.3 Use a 13# sleeve to remove the connecting bolt of

three-way catalytic converter and exhaust intermediate

pipe.

Torque: 60±5 Nm.

9.4 Use a 10# sleeve to remove heat insulating mattress

of exhaust pipe.

9.5 Use a 13# sleeve to remove the connecting bolt of

exhaust manifold and three-way catalytic converter.

Torque: 60±5 Nm.

9.6 Use a 13# sleeve to remove the fixing bolt of exhaust

manifold.

10. Disassembly of connecting portion of transmission

case.

10.1 Use pliers to remove the fixing steel wire clip of

gearshift control cable.

10.2 Use pliers to remove the fixing clip of gearshift

control cable outer case and then take off the gearshift

control cable.

10.3 Use a 13# sleeve to loosen the adjusting screw of

clutch control cable and then take off the clutch control

cable.

10.4 Use a 13# sleeve to loosen the fixing bolt of clutch

control cable on the transmission case.

10.5 Use a 17# wrench to loosen the bleeding bolt of

transmission case to discharge the gear oil.

10.6 See Service Instruction for Chassis for disassembly

of suspension travel portion.

10.7 Use a crow to pry out the half shaft.

11. Disassembly of suspension portion

11.1 Use a 13# sleeve to remove the fixing bolt for rear

engine mount bracket of transmission case.

Torque: 60±5Nm.

11.2 Use a 18# sleeve to loosen the fixing bolt for front

engine mount bracket.

Torque: 80±5 Nm.

11.3 Use a crane to hoist the engine until the iron chain

just bears tensile force.

11.4 Use a 15# sleeve to loosen the fixing bolt for right

engine mount bracket. (at rear of transmission)

Torque: 100±5 Nm.

11.5 Use a 13# sleeve to loosen the three connecting

bolts for right engine mount bracket.

Torque: 65±5Nm.

11.6 Use a 13# sleeve to loosen the three connecting

bolts for left engine mount bracket.

11.7 Pull out oil pipe connector and junctions of relevant

pipelines. Make sure that relevant junction parts have all

detached.

11.8 Hoist the engine up.

12. Separation of transmission case assembly and engine

12.1 Use a 10# sleeve to remove the gearshift control

cable bracket on the transmission case.

12.2 Use a 13# sleeve to loosen the four fixing bolts for

front engine mount bracket.

Torque: 65±5Nm.

12.3 Use a 13# sleeve to remove the connecting bolt of

transmission case and engine, and then make the engine

and the transmission separate.

Torque: 100±10 Nm.

II. Installation Procedure

1. Please follow the order adverse to that for disassembly to install, but care should be taken for

the following matters.

(1) When hoisting, do not install exhaust manifold first, because the longitudinal separation of

engine compartment is not big enough; otherwise, it may affect the assembly.

(2) After installation, please adjust the stroke of clutch pedal. When adjusting, adjust it to a proper

position according to the corresponding requirements, in case of a too big free stroke of clutch, it

may make sound when shifting gear or fail to release; while in case of a too small stroke, wear of

friction plate may be accelerated and travel weakness may occur, if severely, the friction plate may

be burnt out.

Chapter Ten Disassembly of Intake Manifold

I. Disassembly Procedure

1. Use an 8# sleeve to remove the four fixing bolts of

ignition coil and then remove such connections as

ignition cable/injection nozzle harness etc.

2 Use a 10# sleeve to remove the bolt of intake manifold

fixing bracket.

3. Use a 10# sleeve to remove the fixing bolt of

compressor bracket.

Torque: 30±3 Nm.

4 Use a 10# sleeve to remove the fixing bolt of intake

manifold and then take off the intake manifold assembly.

Torque: 8+3Nm.

Chapter Eleven Disassembly of Cylinder Head

I. Disassembly Procedure

1 Use a 10# sleeve to remove the fixing bolt of

valve cover.

Torque: 8±3 Nm.

2. Get the special tool CH-20010 stuck into the

groove on camshaft.

3. Use a 18# sleeve to loosen the fixing bolt of

camshaft timing gear.

Torque: 120±5Nm.

Note:

There is no difference between intake

camshaft and exhaust camshaft, they can be interchanged.

4. Use a cross-head screwdriver to loosen the fixing

bolt on inner fender of timing gear and then take out

the inner fender of timing gear.

5. Use a 10# sleeve to remove the fixing bolt of

camshaft bearing, take out the camshaft assembly

and then the hydraulic tappet system.

Torque: 9.5±1.5 Nm.

Note:

The positions of both camshaft bearing and

bolts, including the order of camshaft bearing, are

unchangeable, and should be conformity with the marks

during assembly/disassembly.

6. Use an hexagon torque wrench to loosen the

fixing bolt of cylinder head and then take off the

cylinder head assembly.

Torque: 50±5 Nm.

Note:

Follow the order as shown in the figure to

loosen the fixing bolts of cylinder head.

7. Disassembly of valve

7.1 Use a special tool to press down the valve

spring, take out the locking plate, and then take off

valve spring, valve and valve seat insert.

7.2 Use a special tool to pull out the valve oil seal.

II. Overhaul of Cylinder Head System

1. Detection of camshaft

1.1 Measurement of height of cam. Use an outside

micrometer to measure wheel height of the cam.

Wheel height of the intake camshaft: 37.11mm.

Wheel height of the exhaust camshaft: 37.09mm.

1.2 Inspection of camshaft journal. Use an outside

micrometer to measure each journal of the camshaft,

please see Specification Table for specific data.

2. Detection of valve

2.1 Detection of valve spring. Two items of data of

valve spring should be measured.

Length of the spring: 49mm

Squareness of the spring: 1.2mm (limit)

2.2. Detection of valve.

2.2.1 Measurement of diameter of valve stem

Measurement point

2.2.2 Measurement of valve guide inside diameter

Use an inside micrometer to measure inside

diameter of the guide.

Fit clearance between intake valve stem and valve

guide: 0.012~0.043mm

Fit clearance between exhaust valve stem and valve

guide: 0.032~0.063mm

Note:

If abnormal noise is generated due to

serious wear of valve guide, do not replace the valve

guide, because the assembly technique requirements to

valve guide is very strict; please replace the cylinder head

assembly.

2.3 Boring and grinding valve seat insert

2.3.1 Inspection of fitting surface of valve. Apply a

circle of red lead on the valve sealing strip and then

gently place the strip onto the valve seat insert,

softly and forcibly press it down, but do not turn it.

Take out the valve, observe if there is broken part on

the red lead, if any, boring and grinding the valve

seat insert is required.

2.3.2 Select an appropriate reamer, use 45° conical

surface as cooperate standard value to check valve

cooperation position: the optimal position is the

center of the valve, if not so, be sure to revise. Cut

on the conical surface 70° inward and 30° outward

at the center of the cooperation position.

2.3.3 Perform seat grinding for the valve sealing

strip with polishing compound

Measurement point

2.3.4 Detection of planeness of cylinder head

Follow the method as shown in the figure to

measure planeness of the cylinder head with a feeler

gauge; the planeness of the cylinder should not

exceed 0.05-0.10mm, if exceeding this valve,

replace the cylinder head assembly.

III. Assembly of Cylinder Head Assembly

1. Please follow the order adverse to that for

disassembly of cylinder head to install, but care

should be taken for the following matters during

installation.

2. Use the special tool CH-20012 to install new

valve oil seal onto the guide first.

3. Insert big end of the guide onto the valve guide.

4. Envelope the special tool onto CH-20012, and

then softly and forcibly compact.

5. Use a hammer to knock the valve oil seal

installation tool, when a metal crash sound is heard,

take out CH-20012.

6. The methods for installation and assembly of

valve spring are the same. Then install valve, spring,

keeper, top barrel and rocker arm. (when installing

the top barrel, add a little engine oil into the hole).

7. Install camshaft and camshaft bearing shell cover

assembly.

Note:

When installing, remember to differentiate intake

camshaft from exhaust cam. The intake camshaft has a

gear at tail, and pay attention to the diacritical marks on

camshaft bearing shell covers.

8. Installation of camshaft and oil seal

8.1 After adding engine oil on the camshaft bearing

shell, place intake and exhaust camshafts, cover

bearing shell covers properly, install the fixing bolts

for the bearing shell covers, and then use a 10mm

sleeve to hold down the bearing shell covers step by

step (the two bolts on the one and the same bearing

shell cover should be tightened at the same time).

Torque: 8.5±1.5 Nm.

9. Remember to apply sealant to the position as

shown in the figure when installing the first bearing

shell.

10. Tightening order of camshaft bearing shell

cover.

Tighten the camshaft bearing shell cover as shown

in the figure.

Installation of camshaft oil seal:

Apply a little engine oil on the camshaft oil seal,

envelop the oil seal onto the camshaft, and then

install use the special tool.

11. Remember to check elasticity of valve cover

gasket for aging and breakdown, if any, replace with

new one. When installing, pay attention to

installation position.

12. Tighten the valve cover bolt.

Chapter Twelve Disassembly and Installation of Oil Pump and

Lubrication System

I. Disassembly Procedure

1. Roll over the engine and use a 10# sleeve to remove

the fixing bolt of oil pan.

Torque: 15+3 Nm

2. Use a screwdriver to pry out the oil pan at the given

position for prying out on the oil pan.

Note:

Because the oil pan and cylinder block are sealed

with glue, so, do not knock with such hard articles as

hammer etc. when disassembling, use a rubber hammer to

slowly strike at left and right instead.

3. Use a 10# sleeve to remove the fixing bolt of engine

oil strainer.

4. Use an 8# sleeve to remove the fixing bolt of engine

oil guard board.