Chery S11 / Chery QQ. Manual — part 110

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

9

2.5 Disassembly of tension pulley

2.5.1 Compress the top dead center at the first cylinder

piston. After disassembly of timing cover, pull the

bolt and clockwise rotate the timing gear with

wrench. And then align the timing mark of camshaft

timing gear and the raised mark on camshaft cover;

2.5.2 Screw off the bolt of tension pulley and remove the

tension pulley.

2.6 Disassembly of timing belt

Notice: Do not use sharp tools like screwdriver during

disassembly of belt.

Notice: Pay attention to the following items during using

the timing belt:

l Do not bend the belt with small angle, or the rigging in

belt will break.

l Do not pollute grease and water because the using

expectancy of belt is short.

l Only clockwise rotate the engine after mounting the

belt.

2.7 Disassembly of crankshaft timing gear

Timing Mark

Timing Mark

Clockwise

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

10

2.8 Inspect the timing belt carefully, and replace new components under any of the following circumstances or when

the mileage is up to the conditions of replacement:

2.8.1 Chap of back-side rubber

2.8.2 Chap of dedendum, chap of separated cord fabric.

2.8.3 Wearing, gear missing and incomplete gear of cord fabric.

2.8.4

Abnormal wearing of belt flank.

2.8.5

Notice: Replace the belt as any following situation occurs, even though abrasion cannot be found directly:

The water pump leaks water out, and requires continuing infusion.If the belt is spotted with much oil stains, and the

rubber may be damaged due to expansion, you should replace the belt.

Timing belt model and type

Part number

372-1007081

Width of belt

２５.3mm

Tension Pulley of Timing BeltRotate the bolt of tension pulley bracket and hear if it is noisy; check the contacting

surface

and

look

if

it

is

damaged.Model

and

type

of

tension

pulley

of

timing

belt

Part number

372-1007030

Width

２７.０mm

Outer diameter

φ50mm

Check

if

the

out

is

damaged.Timing

belt

model

and

type

ＥＦ

Type

Item

ＧＬ, ＺＬ, ＧＳ, ＺＳ

Camshaft timing pulley diameter(mm)

φ110.7

+0.1

-0.2

Camshaft timing pulley diameter(mm)

φ54.65

+0.7

-0.13

Chap

Chap

Wearing

Abnormal

Gear

Fall off with

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

11

Check the timing belt back plate for any deformation.

Standard size of crankshaft timing gear

Width

28.6mm

3. Installation

3.1 Assembly of crankshaft timing pulley.

3.2 Installation of timing (at the top dead center of the

first cylinder piston)

3.2.1 Put the camshaft timing gear on the front end of the

exhaust camshaft, align the locating slot on the gear with

the locating pin on the end of the camshaft, and then fix

the timing gear with bolts. The tightening torque for the

bolts is 100±5Nm.

Make sure that the clashing mark of crankshaft timing

pulley aligns with the mark of oil pump.

3.3 Install the tension pulley. After adjust the tension of

timing belt, install the tension pulley bolt and tighten it

with the torque specified. Adjust the tension of the timing

belt acording to the following instruction, and install the

tension pulley.

3.3.1 As indicated in the figure, make the tensioner

swing to the right with a screwdriver so that the distance

between the edge of the tension pulley and the circular arc

of the water pump body is 8mm, and then tighten the

tension pulley bolts with the torque of 25±3Nm.

Timing Mark

Timing Mark

Chery QQ Service Manual

Mechanical Part of SQR 472Engine

12

3.3.2 Rotate the crankshaft along the rotating direction of

the engine for 2 rounds so that the timing mark on the

timing gear of camshaft and crankshaft is matched

respectively, and then tighten the crankshaft belt pulley

bolts.

3.3.3 The force required to press down the central

position between the 2 pulleys at the in-tension side of the

timing belt for about 5mm is:

［Reference］ 19.6-29.4N(2.0-3.0kg)

Notice: when the deflection can not reach the standard, it

is necessary to adjust the fixing bolt of tension pulley

mentioned above.

Tighten the fixing bolt of the tension pulley with the torque

as specified. The tightening torque is 25±3N.m

3.4 Assembly of Timing Belt Back Plate.

Notice: Install the timing belt back plate in the direction as

indicated in the right figure.

3.5 Install the torsional damper with special tools.

3.5.1 Without flywheel

3.5.1.1 Hitch the part of crankshaft pulley with the belt

of special tool.

3.5.1.2

Hold on the handle of the special tool and

prevent the toothed belt from rotating. Tighten the bolts

with the specified torque.

Torque: 98.0±10N.m{10±1kgm}

Inside

Outside