Chery B11. Manual — part 55

Maintenance Manual for Chery·Oriental Son

Engine Section

Installation Notice

piston

Piston Pin Installation

(1) Measure the following sizes of piston, piston

pin and connecting rod.

A：Length of inserting piston pin in the hole.
B：Width of pin sockets
C：Length of piston pin
D：Width of small end of connecting rod.

(2) Put measured sizes above into following formula

to calculate L.

L＝[(A－C)－(B－D)] / 2

(3) After inserting compression rod of the special

tool into piston pin, install pipe A in the top of

compression rod.

连杆

connecting rod

(4) Install forward marks of piston and connecting

rod towards the same direction.

piston

(5) Daub engine oil on the external diameter of

piston pin

(6) Through

Pipe A, insert compression rod,

piston pin and pipe component installed

according to (3) into piston pin hole from the

side of forward mark.

3mm+L

(7)

Screw on guide block B into guide pipe A to

make clearance value between guide block A

and guide block B equal to the value of Value L

got from (3) plus 3mm.

guide block B

guide block A

compression rod

(8) Keep forward mark of piston upward. Install

piston and connecting rod component in base

of piston pin installer.

piston pin

forward mark

forward mark

(9) Force piston Pin in under pressure. When

the pressure is less than standard value,

replace piston pin and piston component

and/or replace connecting rod.

standard value： 7350～17200N

Guide pipe A

base

Guide block B

Maintenance Manual for Chery·Oriental Son

Engine Section

(10) Check if piston can rotate freely.

Oil Control Ring Installation
(1) Put the main ring of oil control ring into oil

ring groove.
Remarks:
1. There’s no difference of upper and lower

surface between blade and main ring.

2. New blade and new main ring shall be

colorized to distinguish their sizes.

Size

Identification color

Standard

Nil

Increase 0.50mm

Red

Increase1.00mm

Yellow

Upper

blade

Main

ring

(2) Put upper blade. When installing blade, force

one side of blade into piston oil ring groove.
Then force the rest parts of blade into oil ring
groove with the thumb as shown.
Expanding blade with ring clamp will break it
off and make it differed from other piston
rings.
Caution：
Don’t use ring clamp to install blade

Lower

blade

(3) Install lower blade in accordance with Step

(2).

(4) Ensure if blade can turn from the left to the

right freely after installing blade.

Installation of No.1 compression ring and
No.2compression ring
(1) After installing No.2 compression ring, install

No.1compression ring with ring clamp.
Remarks:
1.There’s the identification mark on the top of
the ring.

Identification mark
No.1 ring. 1R
No.2 ring. 2R

2.When installing piston ring, keep the mark
upwards and towards the top of piston.
3.Size marks of piston shown as the following.

Size

Size mark

Standard

Nil

Increase 0.50mm

50

Increase 1.00mm

100

Identification

mark

“2R”

Identification

mark

“1R”

Direction

mark

1R

2R

Side of the
crankshaft
pulley

R2 open and

main ring

open

blade clearance

ring clamp

Upper blade

Lower blade

Piston pin

Maintenance Manual for Chery·Oriental Son

Engine Section

Piston and Connecting Rod Component Installation

(1) Daub enough engine oil on piston, compression

ring and oil control ring.

(2) Adjust open position of compression ring and

oil control ring (blade and main ring) to the
position as shown.

(3) Rotate crankshaft to make crank pin located in

the middle of cylinder

Timing belt

side

(4) Before inserting piston and connecting rod

component into cylinder, proper screw-mounted
protector is applied in connecting rod bolt. Be
careful and don’t damage crank pin.

(5) Use suitable piston ring compressor to insert

piston and connecting rod component into
cylinder.

Caution:

·There’s a forward mark on the top of piston,

make it point to straight position of the
engine (the side of timing belt).

Direction

mark

Connecting Rod Bearing Installation
If it is necessary to replace bearing, choose and
install bearing according to the following steps.
(1) Measure external diameter of crank pin and

confirm the groups according to the following
table. As crankshaft for maintenance,
distinguish sizes by painting color in the
position as shown.

(2) Identification

mark

of connecting rod bearing is

imprinted in the position as shown.

Crank pin

Connecting rod bearing

Groups

Identification

color

External

diameter

(mm)

Identification

mark

Identification

color

Thickness

(mm)

Ⅰ

Yellow

44.995～

45.000

1

Yellow

1.487～

1.491

Ⅱ

Nil

44.985～

44.995

2

Nil

1.491～

1.495

Ⅲ

White

44.980～

44.985

3

Blue

1.495～

1.499

identification

mark

Internal diameter of connecting rod：48.000～48.015mm

(3) Choose bearing in the table above, according to

groups assured in (1) and (2).
Examples for choosing bearing:
If measurement value of external diameter of
crankshaft pin is 44.996mm , it shall be Group 1
in the table above. If replacing crankshaft of
maintenance, check identification color applied
on new crankshaft pin. If it’s yellow, crankshaft
pin shall be Group 1 and choose connecting rod
bearing of which identification mark is 1.

Maintenance Manual for Chery·Oriental Son

Engine Section

Installation of Connecting
Rod Cap
(1) When

installing

connecting rod cap,

check marks of disassembling. If installing
new parts which have no marks, install
anti-rotating gap as shown on one side.

(2) Ensure if axial clearance of big end of

connecting rod is suitable.
Standard value：0.10～0.25mm
Limit value：0.4mm

Connecting Rod Nut Installation
Caution:

Before installing connecting rod cap,

disassemble spark plug and install
connecting rod nut, if having installed
cylinder cap.

(1) As for connecting rod nut and bearing,

plastic-zone screw-on method shall be
adopted. Before reusing the bearing, check if
the bearing is expanded. Checking method:
screw nuts into screw thread of bearing with
fingers till the whole length of screw thread. If
nuts can’t be screwed on smoothly, screw
thread may be expanded and bearing should
be replaced.

(2) Before screwing nuts on, daub oil on screw

thread of nuts and seat surface.

(3) Screw nuts into bearing with fingers and

screw nuts on alternatively to install
connecting rod cap correctly.

(4) Screw nuts on by torque of 20N.M.
(5) Daub paint mark on every nut head.
(6) Daub paint mark on bolts of which the

position is from paint mark on every nut
head to screwing direction of90～100°and
note down the paint mark.

(7) Screw nuts on from 90～100°until marks

on nuts and bearing are aligned.
Caution:

If screwing angle is less than 90°,

screwing specified capability can’t
be assured. When screwing it on,
notice screwing angle.

If screwing nuts are excessively

tightened (exceed angle of 100°) ,
screw nuts off totally. And restart to
screw nuts from step 1

油漆
标记

油漆标记

cylinder

number

anti-rotating

gap

paint mark

paint

mark