Chery B11. Manual — part 54

Maintenance Manual for Chery·Oriental Son

Engine Section

39

end

of

valve rod

valve seat

(1)Assemble the valve and measure the flange height of

valve rod between the end of valve rod and seat

surface of valve spring. If the measurement value

exceeds the assigned limit value, the valve seat

should be replaced.

flange

height

of

l

d

seat surface

of

valve

i

Standard value: intake. . 49.30mm

exhaust. . 49.30mm

Limit value: intake. . 49.80mm

exhaust . . 49.80mm

Points for maintaining the valve seat

(1) Before maintaining the valve seat, check the

clearance between the valve duct and the valve rod.

Maintain after replacement of valve duct if

necessary.

(2) Repair the width and angle of the valve seat until

their adjustment to the assigned value with abrasion

machine.

(3) After repairing the valve seat, rub the valve and

the valve seat in pairs with rubbing cream. Then

check the flange height of valve rod. (Refer to the

checking item of valve seat).

Points for changing valve seat

(1)Cut a part of the to-be-replaced valve seat from the

inner side to make it thinner and then remove it.

(2)Repair and adjust the seat hole in cylinder cover

according to the outer diameter of the enlarged

valve seat.

Diameter of valve seat washer

enlargement size 0.30

34.435-34.455

intake

valve seat

enlargement size 0.60

34.735-34.755

enlargement size 0.30

31.935-31.955

exhaust

valve seat

enlargement size 0.60

32.235-32.255

(3)Before assemble the valve seat washer, heat

the cylinder cover to the temperature of

about 250℃, or cool the valve seat washer

in the liquid nitrogen in order to engage

inside the cylinder cover.

(4)Repair and adjust the valve seat to the

assigned width and angle with a valve seat

milling cutter. (Refer to Points for

maintaining the valve seat).

cut

height of valve

seat washer

enlarge the

inner

di

t

Maintenance Manual for Chery·Oriental Son

Engine Section

40

Points for changing of valve duct

(1) Press out the valve duct to the direction of

cylinder with press machine.

(2) Modify the valve duct hole of cylinder cover

until the hole diameter gets to the size of

enlarged valve duct to be installed.

。Caution:

flange

value

Do not use a new valve duct with the same size

as the disassembled valve duct.

Duct hole diameter of valve in the cylinder

cover.

enlarge size 0.05： 11.05-11.068

enlarge size 0.25： 11.25-11.268

enlarge size 0.50： 11.50-11.518

(3)As shown in the illustration, press the valve

duct to the assigned flange value.

Standard value: 14mm

Caution:

。Press the valve duct from the top surface

of cylinder head.

。the length of intake valve duct and exhaust

valve duct are different. (Intake valve：

45.5,exhaust valve：50.5）

(4)After installation of valve duct, insert the

new valve and check if it could move smoothly.

Maintenance Manual for Chery·Oriental Son

Engine Section

Chapter 4 Crank Connecting Rod Mechanism

1、

Piston and connecting rod component

Daub oil on all the

inner parts when

installing.

Disassembling steps

1.

Connecting rod nut 2、Connecting rod cap 3、Connecting rod bearing

4、Piston and connecting rod component

5、 Connecting rod bearing 6、No.1 compression ring 7、No.2 compression

ring 8、Oil control ring

9、 Piston pin 10、Piston 11、Connecting rod 12、Connecting

rod bolt

Maintenance Manual for Chery·Oriental Son

Engine Section

Disassembling Notice

Connecting Rod Cap

Disassemble

(1) Mark cylinder number on the side of

connecting rod big end to prepare for

correct installation.

cylinder

number

(2) Take turns putting connecting rod,

connecting rod cap and connecting rod

bearing away, according to cylinder

number.

Piston Pin Disassemble

(1) After inserting compression rod of the special tool

from the top of piston marked with the arrowhead,

install guide block C in the top of compression rod.
(2)Keep forward mark of piston upward. Install piston

and connecting rod component in base of piston pin

installer (special tool).

(3)Force piston pin out with pressure.

Caution:

Take turns putting piston, piston pin and

connecting rod disassembled away according

to cylinder number.

piperA=17.9mm

piston pin

installer

guide block B

piperA=18.9mm

guide block C

piperA=20.9mm

base

piperA=21.9mm

compression

rod

forward mark

forward mark

guide block C

base