Mitsubishi Lancer (4A9 engine). Manual - part 32

CYLINDER HEAD GASKET

ENGINE MECHANICAL <4A9>

11A-42

CYLINDER HEAD GASKET

REMOVAL AND INSTALLATION

M1112004005111

Pre-removal Operation
• Fuel Line Pressure Reduction (Refer to GROUP 13A − 

On-vehicle Service, How to Reduce Pressurized Fuel 

Lines ).

• Engine Room Under Cover Front B and Engine Room 

Side Cover (RH) Removal (Refer to GROUP 51 

− Under 

Cover ).

• Engine Oil Draining (Refer to GROUP 12 − On-vehicle 

Service, Engine Oil Replacement ).

• Engine Coolant Draining (Refer to GROUP 14 − On-vehi-

cle Service, Engine Coolant Replacement ).

• Air Cleaner Intake Hose and Air Cleaner Assembly 

Removal (Refer to GROUP 15 

− Air Cleaner ).

• Battery and Battery Tray Removal (Refer to GROUP 54A 

− Battery ).

• Exhaust Manifold Removal (Refer to GROUP 15 − 

Exhaust Manifold ).

• Timing Chain Removal (Refer to ).

Post-installation Operation
• Timing Chain Installation (Refer to ).
• Exhaust Manifold Installation (Refer to GROUP 15 − 

Exhaust Manifold ).

• Battery and Battery Tray Installation (Refer to GROUP 

54A 

− Battery ).

• Air Cleaner Intake Hose and Air Cleaner Assembly Instal-

lation (Refer to GROUP 15 

− Air Cleaner ).

• Engine Coolant Refilling (Refer to GROUP 14 − On-vehi-

cle Service, Engine Coolant Replacement ).

• Engine Oil Refilling (Refer to GROUP 12 − On-vehicle 

Service, Engine Oil Replacement ).

• Alternator and Others Belt Tension Check and Adjustment 

(Refer to ).

• Engine Room Under Cover Front B and Engine Room 

Side Cover (RH) Installation (Refer to GROUP 51 

− Under 

Cover ).

• Fuel Leak Check.

AC701002

1

8

7

6

5

9

4

3

2

11 ± 4 N·m

AC

11 ± 4 N·m

N

Removal steps 

1.

Control wiring harness connection

2.

Purge solenoid hose connection

3.

Brake booster vacuum hose 
connection

Removal steps (Continued)

CYLINDER HEAD GASKET

ENGINE MECHANICAL <4A9>

11A-43

4.

Brake booster vacuum hose 
assembly

<<

A

>>

>>

E

<<

5.

Fuel high-pressure hose 
connection

6.

Water hose connection

7.

Heater hose connection

<<

B

>>

>>

D

<<

8.

Hose clip

<<

B

>>

>>

D

<<

9.

Radiator upper hose connection

ACA00782

20 ± 1 N·m

11

11

10

13

15

14

18

17

N

AB

<Cold engine>
25 ± 1 N·m 

 +

180˚ to 184˚

11 ± 1 N·m

12

16

19 ± 1 N·m

Removal steps (Continued)

Removal steps 

<<

C

>>

>>

C

<<

10. Front camshaft bearing cap

<<

C

>>

>>

C

<<

11. Camshaft bearing cap

12. Camshaft and camshaft sprocket 

assembly (exhaust side)

Removal steps (Continued)

CYLINDER HEAD GASKET

ENGINE MECHANICAL <4A9>

11A-44

REMOVAL SERVICE POINTS

<<A>> FUEL HIGH-PRESSURE HOSE DISCON-
NECTION

AC403077AB

Fuel high-pressure
hose

Stopper

1. Remove the stopper.

AC403078 AB

Fuel high-pressure
hose

Retainer

2. Raise the retainer, and pull out the fuel high-

pressure hose.
NOTE: If the retainer comes off, install it securely 
after pulling out the fuel high-pressure hose.

<<B>> HOSE CLIP/RADIATOR UPPER HOSE 
DISCONNECTION

AC606081

Mating marks

AE

1. Make mating marks on the radiator hose and 

hose clamp as shown to install them in the original 
position. Then, remove them.

AC302615

Hose clip

Claw (Tip)

AE

2. Break off the tip of hose clip claw and spread out 

the hose clip.
NOTE: If there is a hose clip claw, the hose clip 
cannot spread to capacity because the claw con-
tacts the hose clip.

3. Disconnect the radiator hose.

<<C>> FRONT CAMSHAFT BEARING CAP/
CAMSHAFT BEARING CAP REMOVAL
1. Install the engine oil pan removed together with 

the timing chain temporarily to the cylinder block.

CAUTION

When supporting the engine and transmission 
assembly with a garage jack, be careful not to 
deform the engine oil pan.
2. Place a garage jack against the temporarily-

installed engine oil pan to support the engine and 
transmission assembly.

13. Camshaft and V.V.T. sprocket 

assembly (Inlet side)

14. Inlet manifold stay

<<

D

>>

>>

B

<<

15. Cylinder head bolt
16. Cylinder head bolt washer

>>

A

<<

17. Cylinder head assembly

>>

A

<<

18. Cylinder head gasket

Removal steps (Continued)

AC700024AB

MB991454

MB991928

MB991527

AC700023AB

MB991454

MB991895

MB991527

CYLINDER HEAD GASKET

ENGINE MECHANICAL <4A9>

11A-45

3. Remove special tool engine hanger (MB991928 

or MB991895) which was installed for supporting 
the engine and transmission assembly when the 
valve timing chain was removed (Refer to ).

AC403719

AH

1

1

2

2

1

2

3

4

3

4

3

6

5

5

6

8

7

7

8

Engine front

Front camshaft
bearing cap

Camshaft bearing cap

Camshaft bearing cap

4. Loosen the front camshaft bearing cap mounting 

bolts in the order shown, and then loosen each 
camshaft bearing cap mounting bolts as well. 
Remove the front camshaft bearing cap and each 
camshaft bearing cap.

<<D>> CYLINDER HEAD BOLT REMOVAL

AK305406AB

Timing chain side

6

3

4

7

8

9

2

1

5

10

Loosen the cylinder head bolts in two or three steps 
in the order of the numbers shown in the illustration.

INSTALLATION SERVICE POINTS

>>A<< CYLINDER HEAD GASKET/CYLINDER 
HEAD ASSEMBLY INSTALLATION

CAUTION

Do not allow any foreign materials get into the 
coolant passages, oil passages and cylinder.

ACA00785

Top view of cylinder block

Degrease

AB

ACA00788

Degrease

Bottom view of cylinder head

AB

1. Wipe off the sealant and grease on the top 

surface of the cylinder block and the bottom 
surface of the cylinder head, and degrease the 
surface where the sealant is applied.