Mitsubishi Lancer. Manual - part 68

OPERATIONS INSIDE THE ENGINE COMPARTMENT

PERIODIC INSPECTION AND MAINTENANCE

2-8

5. 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.

CAUTION

• The temperature of the surface of the belt

should be as close as possible to normal tem-
perature.

• 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.

<When using the tension gauge>

Use a belt tension gauge to check that the belt ten-
sion is within the standard value.

<Belt deflection check>

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

ALTERNATOR DRIVE BELT TENSION
ADJUSTMENT

1. Loosen the nut of the alternator pivot bolt.
2. Loosen the lock bolt.
3. Use the adjusting bolt to adjust the belt tension

and belt deflection to the standard values.

Standard value:

4. Tighten the nut of the alternator pivot bolt.

Tightening torque: 44

± 10 N⋅m

5. Tighten the lock bolt.

Tightening torque: 23

± 2 N⋅m

6. Tighten the adjusting bolt.

Tightening torque: 5.0

± 1.0 N⋅m

AK101474

15˚

MB991668
(Microphone)

10 – 20 mm

Crankshaft
pulley

Alternator
pulley

Water pump
pulley

AK101481

Tension
Gauge

AK101481

Crankshaft
pulley

Alternator
pulley

Water pump
pulley

Items

When
adjusted

When
replaced

Vibration frequency
Hz

150

− 166

195

− 218

Tension N

441

− 539

785

− 981

Deflection mm
(Reference)

8.6

− 9.7

5.4

− 6.6

AC505095

Approximately
100 N

Crankshaft
pulley

Alternator
pulley

Deflection

Water pump
pulley

AK101483AD

Adjusting bolt

Lock bolt

Pivot bolt

OPERATIONS INSIDE THE ENGINE COMPARTMENT

PERIODIC INSPECTION AND MAINTENANCE

2-9

DRIVE BELT TENSION CHECK <4G6>

1. Make sure that the indicator mark is within the

area marked with A in the illusttation.

CAUTION

Check the drive belt tension after turning the
crankshaft clockwise one turn or more.
2. If the mark is out of the area, replace the drive

belt.
NOTE:

The drive belt tension check is not necessary as
auto-tensioner is adopted.

A3. CHECK IGNITION CABLES FOR
DAMAGE

M6020200300059

1. Check the ignition cable and rubber cap for

damage or weakness, and check the installation
condition.

2. Check the ignition cable and spark plug,

distributor, and ignition coil connections for
contamination, dirt, etc.

3. If dirty, clean it; if damaged, replace it.

A6. REPLACE ENGINE TIMING BELT
<EXCEPT VEHICLES WITH TIMING
CHAIN>

M6020200600050

For information concerning the replacement proce-
dures, refer to the Workshop Manual.

A7. CHECK OPERATION OF
CRANKCASE EMISSION CONTROL
SYSTEM

M6020200700091

BREATHER HOSE

1. Inspect the breather hose for cracks or damage.
2. Clean the inside of the breather hose if necessary.
3. Inspect the ventilation filter for clogging.

VENTILATION HOSE

1. Check entire circumference and length of hoses

using a mirror as required.

2. Check all clamps for tightness and the

connections for leakage.

3. Hoses should be replaced immediately if there is

any evidence of deterioration or damage.

AC102125AC

Indicator
mark

AC303993

< 4G1 >

AC300827AE

< 4G6 >

AC303995

Ventilation hose

Breather hose

< 4G1 >

AC300829

Ventilation hose

Breather hose

< 4G6 >

OPERATIONS INSIDE THE ENGINE COMPARTMENT

PERIODIC INSPECTION AND MAINTENANCE

2-10

POSITIVE CRANKCASE VENTILATION
SYSTEM CHECK

1. Remove the ventilation hose from the PCV

(Positive crankcase ventilation) valve.

2. Remove the PCV valve from the rocker cover.
3. Reinstall the PCV valve at the ventilation hose.
4. Start the engine and run at idle.

5. Place finger at the opening of the PCV valve and

check that vacuum of the intake manifold is felt.
NOTE:

At this moment, the plunger in the PCV valve
moves back and forth.

6. If vacuum is not felt, clean the PCV valve or

replace it.

PCV VALVE CHECK

1. Insert a thin rod into the PCV valve from the side

shown in the illustration (rocker cover installation
side), and move the rod back and forth to check
that the plunger moves.

2. If the plunger does not move, there is clogging in

the PCV valve. In this case, clean or replace the
PCV valve.

A8. REPLACE SPARK PLUGS

M6020200800021

After removing old spark plugs, install new ones and
tighten them at the specified torque.

A9. CHECK RADIATOR HOSES FOR
DAMAGE AND PROPER CONNECTION

M6020200900095

1. Check entire circumference and length of hoses,

using a mirror as required.

2. Check that hoses installed in grommets pass

through the centre of the grommets.

3. Check all clamps for tightness and connections

for leakage.

AC303994

< 4G1 >

PCV valve

Ventilation hose

AC300828AE

< 4G6 >

PCV valve

Ventilation hose

AC305653 AB

PCV valve

AC305654 AB

PCV valve

AC303996

OPERATIONS INSIDE THE ENGINE COMPARTMENT

PERIODIC INSPECTION AND MAINTENANCE

2-11

A10. CHECK ENGINE COOLANT LEVEL
IN RESERVOIR

M6020201000028

Check that the coolant level is between the "FULL"
and "LOW" lines when the engine is at the normal
operating temperature.

A11. CHANGE ENGINE COOLANT

M6020201100092

1. Stop the engine after it is fully warmed up.
2. Add detergent to the engine coolant in order to

flush the cooling system, and start the engine.

3. Loosen the drain plug, remove the radiator can

and drain the coolant.

4. Feed fresh water into the cooling system through

the filler port of the radiator in order to wash the
cooling system, and then tighten the drain plug.

5. Drain the coolant from the reserve tank.
6. Install the reserve tank.

7. Depending upon conditions of operation,

determine the amount of long life coolant,
antifreeze or antirust to be added to the coolant.

Recommended antifreeze: DIA QUEEN
SUPER LONG LIFE COOLANT or equivalent

CAUTION

Do not use alcohol or methanol anti-freeze or any
engine coolants mixed with alcohol or methanol
anti-freeze. The use of an improper anti-freeze
can cause the corrosion of the aluminium com-
ponents.
8. Fill the cooling system with soft water through the

filler port, and add long life coolant, if necessary.

9. Fill the reserve tank with coolant.
10.Install the radiator cap and the reserve tank cap.
11.Recheck the engine coolant level after a road test.

CAUTION

When removing the radiator cap, be careful to
blow out steam and boiling water.

REMOVAL OF ENGINE COOLANT FROM
THE CYLINDER BLOCK DRAIN PLUG

1. Drain the engine coolant by removing the drain

plug and then the radiator cap.

2. Remove the cylinder block drain plug from the

cylinder block to drain the engine coolant.

3. Remove the reserve tank to drain the engine

coolant.

AC210258

Reserve tank

Full

Low

AC305655

AC305656

AC208283 AC

Cylinder block
drain plug

<4G1>
Inlet side

AC303355

<4G6>
Inlet side

Cylinder block
drain plug

Content .. 66 67 68 69 ..