Chery S11 / Chery QQ. Manual — part 112

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

17

2.7.1 Measure the camshaft with micrometer caliper. If it

is below to the specified limit, replace with a new one.

Camshaft journal Unit: mm

EF

Type

Item

ZL, RL

GL, GS, ZS

IN

φ23.0

-0.02

-0.033

Standard value

EX

φ23.0

-0.02

-0.033

IN

φ22.9

Limit: 0.10

EX

φ22.9

2.7.2

Inspection of camshaft axial clearance

(1) Replace the camshaft when the axial clearance value

measured with dial gauge exceeds the standard value.The

axial clearance of intake camshaft is 0.1~0.170mm.

The axial clearance of exhaust camshaft is 0.1~ 0.173mm.

Limit: 0.18mm.

2.7.3 Inspect the clearance of the engaging tooth of

camshaft

(1) Install the camshaft into the cylinder head.

(2) Confirm the mark forwards on the bearing cap as

well as the axle number, and then tighten the bolts.

(3) Measure the clearance of engaging tooth of the intake

camshaft with dia indicator.

Notice: ·Measure at 4 points on the circle of the piston

·Turn the intake camshaft with special tools.
·Make sure that the marks on the driven gear and

the driving gear of the camshaft match with each

other.

Inspect the clearance of the engaging tooth of camshaft:

Item

Standard value

Limit

Single tootj

0.04-0.13

0.30

3. Installation

3.1 Under the circumstance that special tools are used:

3.1.1

Fix the 2 holes (φ6) of the camshaft gear

assembly with special tool.

3.1.2

Rotate the driven gear to the right with special

tool and tally the mark hole of driven gear with that of

camshaft driving gear, or their marking way complies with

each other, fix the driven gear with bolts.(Thread: M5;

Thread pitch: 0.8)

For Fixing

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

18

3.2 Under the circumstance that special tools are not

available:

3.2.1

Screw the M6 bolts into the camshaft driven gear

at the position indicated in the right figure. Insert a

screwdriver into the gap between the M6 bolt and the

camshaft journal and trun the driven gear rightwards so

that the fitting mark of the 2 gears match with each other

or the tooth head of the 2 gears accord with each other, and

then fix the driven gear with bolts (M5×0.8).

Notice: Don’t damage the journal, adjust the operation.

3.3 Assembly of camshaft

Notice: Pay attention to the axial clearance of the camshaft

3.3.1 Spread grease on the gear of camshaft and the axial

of cylinder head.

3.3.2 Remove the fixing bolts for camshaft driven
gear after mounting the camshaft.

3.3.3 Mount the camshaft, align the timing mark as can

be seen from the right picture

3.3.4 Spread oil fully on the cam of camshaft assembly,

gears and axial of cylinder head.

3.4 Tighten the camshaft bearing cap by the order of right

picture.

3.5 Screw off the fixing bolts for driven gear of intake

camshaft assembly.

Timing Mark

Gear

of

Exhaust

Gear of Intake camshaft

For Fixing

Bolt

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

19

3.6 Assembly of camshaft cove

Spread sealant on the position (slot) of camshaft cover as

can be seen from the right picture.

3.6.1 Assembly of Camshaft Cover

Tighten the bolts in the order as indicated in the right

figure and with the specified torque.

3.6.2 After spreading oil on the blanking aperture of

cylinder head and the mounting surface of blanking cover,

press the blanking cover with special tool.

Notice:·The blanking cover should be installed in the

direction as indicated in the right figure.

· After being pressed, the blanking cover should be

1±1mm higher than the surface of thecylinder

head.

3.7 Spread the edge of the camshaft oil seal with oil, and

press it into the cylinder head with M10 bolt (length:

50-60mm) and special tools.

Notice:· If the oil seal is reused, spread it with oil before

pressing it into the cylinder head.

· After removing the bolt, knock it with hand so as to

inspect and confirm it.

3.8 Assembly of camshaft timing gear

After spreading sealant on the bolt, prevent it from rotating

with special tool and screw down the bolt of camshaft

timing gear in specified torque.

Torque: 100±5N.m

Notice: Process the special tools as indicated in the right

figure before using them.

Glue Spread Line

Outside

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

20

3.9 Installation of cylinder head cover

3.9.1 The old cushion of the timing belt cover which

contacts the cylinder head cover should be removed

completely.

3.9.2 Put the new cushion into the gloove of the timing

belt cover accurately.

3.9.3 Mount the cylinder head cover on the cylinder

head, and tighten the 8 bolts in the order as indicated in the

right figure and with the specified torque.

Torque: 6±1N.m

4 Inspection of valve

4.1 Standard valve clearance:

IN

0.18±0.05

Valve clearance

EX

0.25±0.05

4.2

Make sure that the timing mark on the camshaft

driving gear is aligned with that on the camshaft driven

gear.

4.3 Inspect the valve clearance as specified in the figure

below with the feeler gauge

Cylinder 1

Cylinder 2

Cylinder 3

Cylinder4

IN

EX

IN

EX

IN

EX

IN

EX

O

O

O

—

—

O

—

—

4.4 Rotate the camshaft for a round to the position as

indicated in the figure, and then measure the valve

Timing

Gear

of

Exhaust

Gear

of

Intake