Chery Tiggo 5 (T21). Service manual — part 126

07–

90

07

If roundness or cylindricity of crankshaft main journal exceeds the specified value, replace the
crankshaft.

8. Check crankshaft radial clearance.

a. Clean the crankshaft main journals and main bearing shells.
b. Install the crankshaft. Place the plastic feeler gauge

(1) on the crankshaft main journal, and make it
parallel to the crankshaft center axis and cover the
installation width range of main bearing cap
completely.

c. Install the crankshaft frame and tighten the main bearing cap fixing bolts to the specified torque in order.
d. Remove the crankshaft frame. Using the feeler gauge,

measure the widest part of compressed feeler gauge.
The measured value is the crankshaft radial
clearance.

If crankshaft radial clearance is not within the
specified range, install new main bearing shell.
Replace the crankshaft if necessary.

For selection of main bearing shell (

See page 07-93

).

9. Check the crankshaft axial clearance.

a. Clean the crankshaft main journals and main bearing

shells.

b. Install the crankshaft frame and tighten the main

bearing cap fixing bolts to the specified torque in
order.

c. Push the crankshaft forward and backward and read

the value from the dial indicator.

If crankshaft axial clearance is not within the specified
range, replace the thrust washer as a set.

1

RT21071120

RT21071130

Measurement Item

Specification

(mm)

Crankshaft Radial Clearance

0.021 - 0.059

CAUTION

 Replace bearing shells in pairs.

RT21071140

Measurement Item

Specification

(mm)

Crankshaft Axial Clearance

0.070 - 0.265

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10.Check the crankshaft coaxiality.

a. Install the crankshaft onto the inspection table and

keep it level.

b. Rotate the crankshaft slowly and read the maximum

change value from the dial indicator.



(Reading from the dial indicator)/2 is the coaxiality of
the crankshaft.

If radial runout is not at the specified range, replace
the crankshaft.

11.Check diameter of crankshaft connecting rod journal.

Using an outer diameter micrometer, measure the
diameter of crankshaft connecting rod journal.

If connecting rod journal diameter is not within the
specified range, replace the connecting rod bearing
shells with new ones, and check the radial clearance of
connecting rod bearing shell.
If radial clearance of connecting rod bearing shell is still
not within the specified range after replacement, replace
the crankshaft.
For selection of connecting rod bearing shell (

See page

07-93

).

12.Check radial clearance of crankshaft connecting rod bearing shell.

a. Clean connecting rod journals and connecting rod bearing shells.
b. Place a feeler gauge (arrow) on the connecting rod

journal as shown in the illustration.

c. Install the connecting rod bearing caps, and tighten the connecting rod bearing cap fixing bolts to



20 + 5 N·m.

RT21071150

Measurement Item

Specification

(mm)

Coaxiality of Crankshaft

0.04

RT21071160

Measurement Item

Specification

(mm)

Crankshaft Connecting Rod Journal

Diameter

47.9

0
-0.016

RT21071170

1

CAUTION

 DO NOT turn the crankshaft during installation.

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d. Remove the connecting rod bearing caps.
e. Using the gauge scale of feeler gauge, measure the

widest part of the compressed feeler gauge to obtain
the radial clearance of connecting rod bearing shell as
shown in the illustration.

If radial clearance of connecting rod bearing shell is
not within the specified range, replace the connecting
rod bearing shell. Replace the crankshaft if necessary.

13.Check connecting rod big end axial clearance.

a. Install the connecting rod bearing caps, and tighten

the connecting rod bearing cap fixing bolts to the
specified torque.

b. Install a dial indicator (2) with its measuring rod

contacting the side of connecting rod cap (1).

c. Turn the dial of dial indicator to reset it to zero.
d. Push the connecting rod forward and backward (do

not move the crankshaft forward and backward) and
read the value on the dial indicator.

If the axial clearance of connecting rod big end is not
within the specified range, replace the piston
connecting rod assembly.

RT21071180

1

Measurement Item

Specification

(mm)

Connecting Rod Bearing Shell Radial

Clearance

0.021 - 0.056

RT21071190

1

2

Measurement Item

Specification

(mm)

Connecting Rod Big End Axial

Clearance

0.15 - 0.40

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Selection of Bearing Shell

Selection of main bearing shell

1. Selection of crankshaft main bearing upper shell.

Related letter marks are available on the cylinder block
(consisting of "A" and "B"). Such as "BBBBA" in the
illustration, each letter from left to right is for one type of
crankshaft bearing upper shell. The first letter "B" is for
the upper shell type of crankshaft main bearing first
journal, and so on; the fifth letter "A" is for the upper shell
type of crankshaft main bearing fifth journal.

2. Selection of crankshaft main bearing lower shell.

Related marks are available on the first balancer at the
front end of crankshaft (consisting of "A" and "B"). Such
as "AAABB" on the first crankshaft front end balancer
shown in the illustration, the first letter "A" is for the lower
shell type of crankshaft main bearing first journal, and so
on; the fifth letter "B" is for the lower shell type of
crankshaft main bearing fifth journal.

3. Precautions for crankshaft main bearing shell assembly:

a. There is shell groove and oil hole on the main bearing upper shell, and the oil hole should be aligned

with that on the engine block, but the main bearing lower shell has no oil hole.

b. Apply a coat of engine oil to the inner surface of main bearing shell before installation. The back side of

bearing shell should be clean without any oil or foreign matter during assembly.

201

BB BBA

XXXXXX

XXXXXXX

NA

RT21071191

Name

Color

Cylinder Block

Mark

Main Bearing

Upper Shell

Red

A

Blue

B

13F14

AAABB

1221

RT21071192

AAABB

Name

Color

Cylinder Block

Mark

Main Bearing

Lower Shell

Red

A

Blue

B