Chery A11. Manual — part 18

CAC Gasoline Engine Maintenance And Servicing Manual

27

——Install new cylinder head bolts and washers into bolt
holes, screw in by hand.








——Tighten cylinder head bolts in four steps in the order

as diagram specified.
Step 1：Tighten to 20—40Nm
Step 2：Tighten to 40—60Nm
Step 3：Rotate 90°
Step 4：Rotate 90°
During rotating, torque- angle torque wrench or
line plotting methods may be applied.

3.Rocker arm mechanism and hydraulic lifting rod removal and installation

Rocker arm mechanism：
removal：
——Loosen rocker arm nuts，remove nuts.
——Remove rocker arm supports.
——Remove rocker arms.
——Remove rocker arm support shims.
——Put each group of rocker arm and rocker arm
support into the same plastic bag for reference，rocker
arm nuts are not permitted to reused after removed.

Fig.24

Fig.25

Fig.26

Fig.27

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Installation：
——Check rocker arm contact surface for abnormal wear，
replace rocker arm if necessary.
——Pull rocker arm support washers onto rocker arm
double end studs.
——Lubricate rocker arms and rocker arm supports with
engine oil.
——Install rocker arm, rocker arm support，then finger
screw in new nut， tighten to 25—29Nm.

Note：Before installing each rocker arm and tightening
nut， appropriate hydraulic lifting rod should be at the

lowest position.

Hydraulic lifting rod：
——Removal：
——Remove hydraulic lifting rods ,in order, and put them
into container filled with oil preventing them from
leaking.
——Check both hydraulic end contact face for abnormal
wear or scratch，
If needed, replace hydraulic lifting rod.

Fig.28

Fig. 29

Fig.30

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Hydraulic lifting rod installation：
——Hydraulic lifting rod size：

——Apply hyperbolical gear lubricant or engine oil on lifting rod,
lifting rod outside diameter and lifting rod ends, install lifting rods
in original order into the holes in the cylinder head.

4.Camshaft and camshaft thrust spacer removal and installation

Removal：
——Measure camshaft end play，clearance should be
0.049—0.129mm.
——Loosen thrust washer bolt，remove thrust washer
bolt(as shown in diagram).
——Remove thrust washer.
——Pull camshaft assembly out from the rear end of
cylinder head，don't damage the camshaft hole in
Cylinder head.

Inspection：
——Check camshaft cam and journal for wear，if worn
out, replace it.
——If camshaft end play exceeds specification, replace
thrust washer.
——Measure the diameter of the camshaft hole in
cylinder head ，or check journal to hole movement with
camshaft，if hole is worn excessively, camshaft may only
be replaced.
——Cam height：

Grade

Lifting rod

outside diameter

Cylinder head

lifting rod hole

diameter

clearance

Standard

Φ22.200—Φ22.212

Φ22.25±0.015

0.023—0.065

T25

Φ22.454—Φ22.466

Φ22.50±0.015

0.023—0.065

Intake cam

T

Exhaust cam

T

478

38.305

37.289

480

38.602

37.586

478E

38.305

37.289

480E

37.559

37.559

Fig.31

Fig.32

Fig.33

Unit：Mm

Fig.34

Note：480 camshaft may only be used on 480M.

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——Camshaft journal and cylinder head cam bearing
hole size：
(1) Standard size mm

(2). Over size (0.38) mm
mm

Installation：
——If camshaft needs to be replaced, check the shape of the
rear end of camshaft to select appropriate camshaft.
——Before installation，apply hypoid gear oil or engine oil
on camshaft cams, assembly camshaft from behind the
cylinder head forward.
——Apply engine oil on camshaft thrust spacer，insert thrust
washer into the groove in the cylinder head.
——Screw 2 bolts into thrust washer tapped holes,
tightening torque is 9—13Nm.
——Check camshaft end play，end play should be as
specified.

——When the hydraulic lifting rod of oversize 0.25 is
applied, camshaft must be selected, or the hydraulic lifting
rod may be stuck.

Camshaft

journal number

Camshaft journal

diameter

Cylinder head

bearing hole

diameter

1

44.74—44.76

44.783—44.808

2

44.99—45.01

45.033—45.058

3

45.24—45.26

45.283—45.308

4

45.49—45.51

45.533—45.558

5

45.74—45.76

45.783—45.808

Camshaft journal

number

Camshaft journal

diameter

Cylinder head

bearing hole

diameter

1

45.12—45.14

45.163—45.188

2

45.37—45.39

45.413—45.438

3

45.62—45.64

45.663—45.688

4

45.87—45.89

45.913—45.938

5

46.12—46.14

45.163—45.188

bolt

Tightening torque

Thrust
washe

r

Fig.35

Fig. 36

Fig. 37

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