Chery S11 / Chery QQ. Manual — part 248

Chery QQ Maintenance Manual 465 Engine Mechanical System

Notice: You should make sure that every
screw and nut is loosened during the
process of above-mentioned work,for the
purpose of camshaft and pulley can rotate
freely.
2) There are a dot on radial line mark

④

①

of camshaft timing belt pulley and another
dot on belt rear cover. Run belt pulley to

⑤

align dot and dot .

④

⑤

3)There is a dot on

⑥

belt rear cover. Run

crankshaft to align dot and dot .

③

⑥

4) Two timing belt pulleys are aligned with
each other.Under this circumstances of belt
being tightened,install the timing belt
according to the illustration of ⑦

- 28 –

5) After installation of belt,put up one end
of torsion spring on the tension bracket,put
up the other end of torsion spring on water
pump screw,the spring tune-up the belt
through self own tension,adjust the bolts
and screws to regulated value.
Turn crankshaft two circles clockwise and
adjust the tension wheel bolts and screws
to the regulated value.
Notice: Smear GY-340 glue on the screw
thread of the tension bolts.Fasten the
adjusting bolts first,then fasten the twisted
bolt.

Tensioner bolt

tighten torque

14.71～22.56N·m

(1.5～2.3kg·m)

Notice: After installation of tension
pulley,turn crankshaft two circles
clockwise and check if marks

①④⑤⑥

aligned with key groove to a straight

③

line after installing tensioner. Repeat
above-mentioned steps until you are
satisfied.

6)Press belt between camshaft and
crankshaft by hand to make sure that
tension is in the regulated scale.

(L)timing belt tension

5.5～6.5 mm

7) Adjust belt tension to the regulated
scope,then tune-up clearance of every
valve to the regulated value.

Chapter 8 Replacement of Cylinder Head

1 Steps of removal

1 Take off fuel pump relay mounted under

Chery QQ Maintenance Manual 465 Engine Mechanical System

the instrument meter plate.
Notice: Make the engine working for 5
seconds in order reduce the pressure of
system,collect and check up the fuel.
2 Disconnect negation pole cable of battery
3 Take off air filter and hose.
4 Remove cover of coolant reservoir tank
5 Remove low pressure hose of radiator and
collect the coolant
6 Remove all hoses and cables which
connect the cylinder head and intake
manifold.
7 Remove high pressure ignition coil
8 Disconnect the harness of exhaust pipe
and exhaust manifold
9 Disconnect oxygen sensor harness
connector and take off exhaust manifold
10 Take off timing belt,see the illustration
for reference.
11 Take off camshaft timing gear,see the
illustration for reference.
12 Remove set bolt from timing belt rear
cover
The order is to loosen 1/4 circle,then to
loosen 1/2 circle,remove the cylinder head
completely,fasten the bolts

- 28 –

13 Take off camshaft bracket

14Remove rocker，rocker seat and rocker
shaft
Notice: Don’t confuse in order that you can
install it to the right position afterwards.

15 Take off the cylinder head,see the
contents of relevant chapters for reference.

2 Steps of installation
Attention:
Clean cylinder head completely,remove the
old gasket,wipe the dirt and residue away.
Clean cylinder body surface and piston top
1 Install a new gasket of cylinder 。
Make sure that the upper mark of gasket is
upwards and in the front side of the engine.
2 Fasten cylinder head and cylinder body。
The fastening bolts order is: from the front

to the rear,intake side 6237,exhaust side
5148.
3 Install camshaft.
4 Install rocker shaft and racker。
5 Smear mixture of sealing agent on the
placing side of crankshaft.
6 Istall cylinder head set bolt,tighten the
bolts accordingly.
7 Install timing belt rear cover set bolt and
fasten the bolts。
8 Install camshaft timing gear and
bolt,fixture。
9 Install timing belt,see the illustration for
reference.
10 Install exhaust manifold and gasket。
11 Install oxygen sensor to exhaust
manifold ,make it connected with the wires.
12 Install exhaust pipe。
13 Install fuel pipe to fuel oil rail。
14 Connect high pressure coil harness to
ignition module connector。
15 Install hose that connect cylinder head
and intake manifold,then connect harness。
16 Connect low pressure hose to radiator。
17 Fill the coolant in the cooling system,see
relevant content of article 6.3.
18 Install air filter and intake hose,then
connet temperature sensor to harness。
19 Connect negative pole cable of battery.

Chery QQ Maintenance Manual 465 Engine Mechanical System

Chapter 9 Replacement of Sealing Washer of Valve Spring

1 Steps of removal
1 Remove cylinder accordingly.
2 Remove valve lock from cylindeer head
assembly.
3 Take off spring damper.
4 Take off spring.
5 Take off sealing washer of valve stem.
6 Take off valve.
2 Cleaning
Clean the combustion chamber.It is
necessary to put a special brush in the
drilling machine for check and inspection
1 Check exhaust pipe and combustion
chamber whether or not there are some
cracks
2 Check to see whether or not there are
burning trail on the the valve top,check to
see whether or not there are some cracks in
the surface and check to see if there are
some damage of the valve rod.
3 Check the clearance between the valve rod
and guide,measure the diameter of valve rod
in upper,middle and lower position with
microscope,different value between guide
and valve rod is the distance of them.
4 If the distance is not within the scope of
0.020-0.050 mm,intake and exhaust 0.030
and 0.060 mm,you should enlarge the hole
in order that you can install the valve of
much larger size.

- 29 –

Chery

5 Check the concentricity of maximal ring
and minimal ring of valve seat.
standard:0.05 mm
Width of intake and exhaust valve should be

1.3-1.5 mm

Chery QQ Maintenance Manual 465 Engine Mechanical System

- 28 –

Chery

3 Repair of valve seat：

If the valve seat cannot touch the valve
equably or touch width is not in standard
scale, the valve and valve seat must be
repaired by grinding, cutting and polishing.

1 Exhaust valve seat:Use the taper rymer to
cut 3 times as shown in figure. First cut at a
angle of 15°,Then 75°and then 45°to create
satisfied touch width
2 Angle of exhaust valve seat
3 Intake valve seat:cutting sequence is the
same as the sequence of exhaust valve
seat,but cutting angle is different,shown as
the following illustration:
4 Steps of installation
1 Install valve.
2 Install valve stem seal.
3 Install spring.
4 Install valve spring damper.
5 Install valve lock.
6 Install cylinder head as the following
illustration.