Chery S11 / Chery QQ. Manual — part 220

SQR7080 Maintenance Manual 372 Engine Mechanical System

a) Work out the differences of the measured values. If it

is above the specified limits, the throttle or the guiding
pipe must be replaced.

[Attention] The measurement points are shown as the
figure. Work out the clearance of the final torn and worn
section

Item Standard

Limit

Valve guide

inside

diameter(mm)

φ5.0

___

Valve stem

outside diameter

(mm)

φ5.0 ___

IN

0.056～

0.020mm

0.07

Spacing

(mm)

EX

0.066～

0.030mm

0.08

(2) Replacement of valve guide

a) Heat the cylinder cover to 80—100 degrees C

with hot water

b) Use special tools to drive in the valve guiding

pipe to the position as shown in the right figure
from the side of the combustion chamber.

[Attention] The removed guiding pipe cannot be
used repeatedly. The air intake and exhaust valve
guiding pipes should not be mixed up in installation.

c) Use special tools to drive in the new vlve guiding

pipe to the position as shown in the right figure.

[Attention] In the process of driving in the guiding
pipe into the cylinder cover, the operation should be
carried out slowly until the pipe gets to the proper
position. No excessive driving should be exerted. Pay
attention to the specifications in the operation.

Measure point

SST

SST

23

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24

EF

Modle

Item

GL,ZL,RL,GS,ZS

IN 13.71±0.25

Height（mm）

EX 12.11±0.25

Driving in depth of throttle guiding pipe

Use reamer to grind the inner diameter to achieve the

standard value of the clearing.

(3) Valve mating surface

a) Smear thin layer of red lead powder on the valve

mating surface. Do not turn the valve, and gently
drive it in. Check the mating condition and the
width of mating line.

Correction of valve base stand ring
[Attention] Signs of breaking or cracking should not
appear on the correction surface. Take it out slowly after
the correction is completed.

1、Use a 45 degree cone as the mating benchmark value.
2、Check the mating position of the throttle. If it is in the
center of the valve, the position is the best one. If not,
proper corrections have to be made.
3、Make conic cutting at the center of the mating position
with 70 degrees toward inwards and 30 degrees outwards.

SQR7080 Maintenance Manual 372 Engine Mechanical System

25

4 Use polishing agent to grind and polish the throttle
sealing.

4-5 Assemble of cylinder head
4-5-1 Cylinder head

Pay attention to the following instructions in the

process of assembling for the other accessories on the
cyliner cover.
(1) Spark plug insulator
1 Put the spark plug insulator in the corresponding hole
on the cylinder headwith special use auxiliary tools,smear
fluid sealant before pressing,pressing height is shown as
the illustration:

Attention· Pay attention that the vertical degree of its

pressing depth and the cylinder head top surface;

· The insulator should not be deformed while being

pressed;otherwise,it is easy for the valve chamber cover
cap to lea

4-6 Installation
1. Installation of valve spring washer and valve oil
sealing
(1) Cover auxiliary tools on the valve rod head,smear oil
on the outer circle of the auxiliary roundness and inside
of new valve oil seal,install it on the illustrated
position,pull out the auxiliary tools of valve oil seal.
[Reference] Insert the oil sealing up to the dimension as
shown in the right figure.

2 Installation of IN and EX
3 Assembling of valve springs

Attention It is for you to distinguish the different

suppliers by means of paintings on the valve spring,valve
spring of same engine should have the same
idenhtification paint marking.

Spark plug
insulator

Sub stool

valve

Oil sealing

Spring bottom
plate

Mark

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26

4 Install the locking blocks for the valve spring stands.

Warning

·Protective eye glasses must be worn in the process of this
operation to protect the eyes.
·Beware of the flying spring and other objects
Upon completion of the installation of the throttle
springs and throttle spring stands, use special tools to
install the locking blocks for the throttle spring stands.

3 Installation of the throttle thrusting rod and throttle
spacing by adjusting the separation cushions
4 Install the cylinder cover base, make identification of
the marks for the front and rear directions.
1. Assmbling of dustproof sealing strip and cylinder

cover

(1) Apply lubricating oil at the threads and grooves

of the bolts.

b)The tightening of the cylinder bolts should follow
the sequence as shown in the right figure. The
tightening is to be carried out in 2—3 operations till
the torque meets the specifications. The torque for the
first tightening operation is 30±2N.m; the torque for
the second tightening operation is 50±3N.m; and the
torque for the third tightening operation is 70±3.5
N.m.

. ○

1 Installation of the spark plug

[Torque] 20±1Nm

Attention: The tools should be placed vertically,so as not
to make the spark plug insulator become
deformed,otherwise it is easy to leak oil.

SST

Apply oil position