Mitsubishi Lancer (4A9 engine). Manual - part 23

D998727

SPECIAL TOOLS

ENGINE MECHANICAL <4A9>

11A-6

MD998727

Oil pan FIPG cutter

Engine oil pan removal

D998781  

MD998781

Flywheel stopper

Supporting the flywheel 
assembly <M/T> or drive plate 
assembly <A/T>

B991993

MB991993

Crankshaft front oil seal 
guide

Crankshaft front oil seal 
installation

MB990699

Differential oil seal installer

B991454

MB991454

Engine hanger balancer

Supporting the engine and 
transmission assembly
NOTE: Special tool MB991454 
is a part of engine hanger 
attachment set MB991453.

B991527

MB991527

Hanger

Tool

Number

Name

Use

MB991895

ON-VEHICLE SERVICE

ENGINE MECHANICAL <4A9>

11A-7

ON-VEHICLE SERVICE

DRIVE BELT TENSION CHECK AND 
ADJUSTMENT

M1111003103622

ALTERNATOR AND OTHERS BELT TEN-
SION CHECK

CAUTION

• When checking the drive belt tension, make 

sure that the engine is cold.

• Check the drive belt tension after turning the 

crankshaft clockwise one turn or more.

Check the alternator and others belt tension in the 
following procedure.
NOTE: For the vehicles without A/C compressor, the 
check procedure and the standard value are also 
same.

Standard value: 

Item

When 
checked

When 
adjusted

When 
replaced

Vibration 
frequency 
Hz

140 

− 171

148 

− 164 198 − 221

Tension N

392 

− 588

441 

− 539 784 − 980

Deflection 
mm 
(Reference)

9.5 

− 12.2

10.2 

− 11.5 6.3 − 7.6

<When the vibration frequency is measured 
{Special tool (MB992080) is used}: 
Recommendation>
NOTE: The vibration frequency measuring method is 
recommended for check and adjustment of the alter-
nator and others belt tension.

MB991895

Engine hanger

When the engine hanger is 
used: Supporting the engine 
assembly during removal and 
installation of the timing chain 
case assembly or transmission 
assembly

B991928

a

b

c

d

e

f

Slide bracket (HI)

AI

MB991928

a: MB991929
b: MB991930
c: MB991931
d: MB991932
e: MB991933
f: MB991934

Engine hanger

a: Joint (50) 

× 2

b: Joint (90) 

× 2

c: Joint (140) 

× 2

d: Foot (standard) 

× 4

e: Foot (short) 

× 2

f: Chain and hook assembly

B992000

MB992000

Crankshaft adapter

Cranking of the engine after the 
crankshaft pulley removal

Tool

Number

Name

Use

AC507219AB

MB992082

MB992081

Belt tension meter set (MB992080)

ON-VEHICLE SERVICE

ENGINE MECHANICAL <4A9>

11A-8

1. Connect the Special tool microphone assembly 

(MB992082) to the Special tool belt tension meter 
(MB992081) of the Special tool belt tension meter 
set (MB992080).

2. Press the "POWER" button to turn on the power 

supply.

3. Press number key 1. Check to ensure that "No. 

01" appears on the upper left of the display and 
that the following numeric values are displayed for 
individual items (M, W, and S):
M 000.9 g/m
W 010.0 mm/R
S 0100 mm
If numeric values have not been entered (new 
tool), set them according to the belt specifications 
as shown below. Once you set them, you do not 
have to set them again. The settings remain 
undeleted even after battery replacement.
NOTE: This operation is to temporarily set the 
preset data such as the belt specifications, 
because if the measurement is taken without input 
of the belt specifications, conversion to tension 
value (N) cannot be made, resulting in judgement 
of error.
<Setting procedure>
(1) Press down the "MASS" button till the belt 

mass select display appears.

(2) Press the "UP" or "DOWN" button to select "01 

1.5GT 0.9" and press the "MEASURE" button 
to decide it.
Check to ensure that "M 000.9 g/m" is 
displayed.

(3) Press the "WIDTH" button to change to the 

belt width input display.

(4) Press number keys 0, 1, 0, and 0 sequentially, 

and press the "SELECT" button to apply them. 
Check to ensure that "W 010.0 mm/R" 
appears on the display.

(5) Press the "SPAN" button to change to the 

span length input display.

(6) Press number keys 0, 1, 0, and 0 sequentially, 

and press the "SELECT" button to apply them. 
Check to ensure that "S 0100 mm" appears on 
the display.

4. Press "Hz" button twice to change the display to 

the frequency display (Hz).

CAUTION

•

AK603849

15˚

15˚

10 – 15 mm

Crankshaft 
pulley

AC

Alternator 
pulley

Water pump
pulley

A/C compressor pulley

MB992080
(Microphone)

The temperature of the surface of the belt should 

be as close as possible to normal tempera-
ture.

• Do not let any contaminants such as water or 

oil get onto the microphone.

• If strong gusts of wind blow against the 

microphone or if there is loud sources of 
noise nearby, the values measured by the 
microphone may not correspond to actual 
values.

• If the microphone is touching the belt while 

the measurement is being made, the values 
measured by the microphone may not corre-
spond to actual values.

• Do not take the measurement while the vehi-

cle's engine is running.

5. Hold the microphone to the middle of the 

alternator and others belt between the pulleys (at 
the place indicated by the arrow), about 10 

− 15 

mm away from the rear surface of the belt and so 
that it is perpendicular to the belt (within an angle 
of 

± 15 °).

6. Press the "MEASURE" button.
7. Gently tap the middle of the belt between the 

pulleys (the place indicated by the arrow) with 
your finger as shown in the illustration, and check 
that the vibration frequency of the belt is within the 
standard value.
NOTE: To take the measurement repeatedly, fillip 
the belt again.

8. After the completion of the measurement, press 

and hold the "POWER" button to turn off the 
power supply.

ON-VEHICLE SERVICE

ENGINE MECHANICAL <4A9>

11A-9

<When using the tension gauge>

AK305688

Alternator 
pulley

Water pump
pulley

A/C compressor
 pulley

AB

Crankshaft 
pulley

Tension
gauge

Use a belt tension gauge to check that the belt ten-
sion is within the standard value.
NOTE: Before inspection, remove the oil level gauge 
guide.

<Belt deflection check>

AC700535

Alternator 
pulley

Water pump
pulley

A/C compressor
 pulley

AB

Approximately
100 N

Crankshaft 
pulley

Deflection

Apply approximately 100 N of force to the middle of 
the alternator and others belt between the pulleys (at 
the place indicated by the arrow) and check that the 
amount of deflection is within the standard value. 

ALTERNATOR AND OTHERS BELT TEN-
SION ADJUSTMENT

AK402420AC

Nut for alternator
pivot bolt

Adjusting bolt

Alternator fixing nut

If not within the standard value, adjust the belt ten-
sion by the following procedure.
1. Loosen the nut of the alternator pivot bolt.
2. Loosen the alternator fixing nut.
3. Use the adjusting bolt to adjust the belt tension 

and belt deflection to the standard values.

4. Temporarily tighten the alternator fixing nut.

Tightening torque: 11 

± 3 N⋅m

5. Tighten the nut of the alternator pivot bolt.

Tightening torque: 47 

± 5 N⋅m

6. Tighten the alternator fixing nut.

Tightening torque: 23 

± 2 N⋅m

7. Tighten the adjusting bolt.

Tightening torque: 5.0 

± 1.0 N⋅m

CAUTION

When checking the belt tension, turn the crank-
shaft clockwise one turn or more.
8. Check the belt tension, and readjust if necessary.
9. When the belt tension is adjusted by measuring 

the deflection, adjust it with a tool for vibration 
frequency measurement or tension measurement 
afterward.

POWER STEERING OIL PUMP DRIVE 
BELT TENSION CHECK <Euro4>

NOTE: 

.

•

An elastic stretch-type belt is used for the power 
steering oil pump drive, therefore, the tension 
adjustment is not necessary.

•

Perform the power steering oil pump drive belt 
tension check according to the following proce-
dures.

<When the vibration frequency is measured: 
Recommendation>

CAUTION

• When measuring the vibration frequency, 

make sure that the engine is cold.

•

AC605857

MB992081

MB992082

Belt tension meter set (MB992080)

AB

Measure the vibration frequency after turning 
the crankshaft clockwise one turn or more.

1. Connect the special tool microphone assembly 

(MB992082) to the special tool belt tension meter 
(MB992081) of the special tool belt tension meter 
set (MB992080).

2. Press the "POWER" button to turn on the power 

supply.