Mitsubishi Colt Ralliart. Manual — part 649

ON-VEHICLE SERVICE

ENGINE MECHANICAL <4G1>

11C-16

<LASH ADJUSTER AIR BLEEDING>

AKX00328

Good

Min.

Max

AE

1. Check the engine oil and replenish or replace the

oil if necessary.
NOTE:

.

•

If there is an only small amount of oil, air will
be drawn in through the oil screen and will get
into the oil passage.

•

If the amount of oil is greater than normal, then
the oil will being mixed by the crankshaft and a
large amount of air may get mixed into the oil.

•

AK100001

High-pressure chamber

AC

If the oil is degenerated, air and oil will not
separate easily in oil, and the amount of air
mixed into the oil will increase.

•

AKX00330

Gradually open
the throttle valve

Close the throttle valve

Approximately
3,000 r/min

Idle speed

Once

15 s

15 s

Drive pattern for air breeding

AE

If the air which has been mixed in with the oil
due to any of the above reasons gets into the
high pressure chamber of the lash adjuster,
the air inside the high pressure chamber will
be compressed when the valve is open and

the lash adjuster will over-compress, resulting
in abnormal noise when the valve close. This
is the same effect as if the valve clearance is
adjusted to be too large by mistake. If the air
inside the lash adjusters is then released, the
operation of the lash adjusters will return to
normal.

2. Run the engine at idle for 1

− 3 minutes to let it

warm up.

3. With no load on the engine, repeat the drive

pattern shown in the illustration above and check
if the abnormal noise disappears (The noise
should normally disappear after 10

− 30

repetitions, but if there is no change in the noise
level after 30 repetitions or more, the problem is
probably not due to air inside the lash adjusters).

4. After the noise has disappeared, repeat the drive

pattern shown in the illustration above a further 5
times.

5. Run the engine at idle for 1

− 3 minutes and check

that the noise has disappeared.

Main

Index

Group

TOC

CRANKSHAFT PULLEY

ENGINE MECHANICAL <4G1>

11C-17

CRANKSHAFT PULLEY

REMOVAL AND INSTALLATION

M1112001601242

Pre-removal Operation
• Front Under Cover Panel Removal (Refer to GROUP 51,

Front Bumper Assembly and Radiator Grille

P.51-2

).

• Side Under Cover Panel (RH) Removal (Refer to GROUP

51, Front Bumper Assembly and Radiator Grille

P.51-2

).

Post-installation Operation
• Drive Belt Tension Check and Adjustment (Refer to

P.11C-8

).

• Side Under Cover Panel (RH) Installation (Refer to

GROUP 51, Front Bumper Assembly and Radiator Grille

P.51-2

).

• Front Under Cover Panel Installation (Refer to GROUP

51, Front Bumper Assembly and Radiator Grille

P.51-2

).

AC402278

1

2

3

4

5

6

181 N·m

48 ± 6 N·m

AB

Removal steps

<<

A

>>

1.

A/C compressor drive belt

2.

A/C compressor drive belt
tensioner assembly

<<

B

>>

3.

Alternator drive belt

<<

C

>>

>>

A

<<

4.

Crankshaft pulley centre bolt

>>

A

<<

5.

Crankshaft pulley washer

>>

A

<<

6.

Crankshaft pulley

Removal steps (Continued)

Main

Index

Group

TOC

CRANKSHAFT PULLEY

ENGINE MECHANICAL <4G1>

11C-18

REMOVAL SERVICE POINTS
<<A>> A/C COMPRESSOR DRIVE BELT
REMOVAL

AC205665AB

Adjusting bolt

Tensioner
pulley

Locking nut

1. Loosen the locking nut of the tensioner pulley

CAUTION

To reuse the drive belt, draw an arrow indicating
the rotating direction (clockwise) on the back of
the belt using chalk, etc.
2. Turn the adjusting bolt in the anti-clockwise

direction (to the left) to remove the drive belt.

<<B>> ALTERNATOR DRIVE BELT
REMOVAL

AC402698

Adjusting
bolt

Nut

Locking bolt

AC

1. Loosen the nut for alternator pivot bolt and locking

bolt.

CAUTION

To reuse the drive belt, draw an arrow indicating
the rotating direction (clockwise) on the back of
the belt using chalk, etc.
2. Turn the adjusting bolt in the anti-clockwise

direction (to the left) to remove the drive belt.

<<C>> CRANKSHAFT PULLEY CENTRE
BOLT REMOVAL

Use the used drive belt to fix the crankshaft pulley
and loosen the crankshaft pulley bolt.

CAUTION

• Do not use the drive belt set up on the vehi-

cles.

•

AC207174

AB

Cable band

Used drive belt

Crankshaft pulley

Do not use a cracked or damaged drive belt.

1. Set the used drive belt as shown and hold it with a

cable band.

AC402556AC

Crankshaft pulley

A/C compressor bracket

Used drive belt

2. Turning the crankshaft pulley to the anti-clockwise

direction (to the left), place the used drive belt to
the A/C compressor bracket, hold the crankshaft
pulley and remove the crankshaft pulley bolt.

Main

Index

Group

TOC

CRANKSHAFT PULLEY

ENGINE MECHANICAL <4G1>

11C-19

INSTALLATION SERVICE POINT
>>A<< CRANKSHAFT PULLEY/CRANK-
SHAFT PULLEY WASHER/CRANKSHAFT
PULLEY CENTRE BOLT INSTALLATION

AC207248

AE

Clean and
degrease

: Clean
: Clean and degrease
: Apply engine oil

Crankshaft pulley

Crankshaft pulley
centre bolt

Crankshaft
camshaft drive
sprocket

Crankshaft

Crankshaft pulley
washer

Engine front

Clean

(Engine oil)

1. Clean the screw hole of the crank shaft, the

crankshaft pulley, the crankshaft pulley washer
and the crankshaft pulley bolt.

2. Clean and degrease the crankshaft pulley

installation side and install the crankshaft pulley.

3. Apply an appropriate quantity of new engine oil to

the thread of crankshaft pulley bolt and the
crankshaft pulley washer top face.

AC209486

Groove

AC209486AB

4. Place the crankshaft pulley washer with the

groove facing on the bolt side.

CAUTION

• Do not use the drive belt setup on the vehi-

cles.

•

AC207174

AB

Cable band

Used drive belt

Crankshaft pulley

Do not use a cracked or damaged drive belt.

5. Set the used drive belt and hold it with a cable

band as during removal.

AC402557AC

Crankshaft pulley

A/C compressor bracket

Used drive belt

6. Turning the crankshaft pulley assembly to the

clockwise direction (to the right), place the used
drive belt to the A/C compressor bracket, hold the
crankshaft pulley assembly and tighten the
crankshaft pulley bolt to the specified torque.

Tightening torque:181 N

⋅m

Main

Index

Group

TOC