Mitsubishi Lancer (4A9 engine). Manual — part 29

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-30

>>F<< CYLINDER HEAD COVER ASSEMBLY
INSTALLATION
1. Remove the sealant from the cylinder head cover

assembly and the matching area of the cylinder
head assembly and the timing chain case
assembly, and degrease the surface where the
sealant is applied.

CAUTION

After the installation, until a sufficient period of
time (one hour or more) elapses, do not apply the
engine oil or water to the sealant application area
or start the engine.

AC311270

Timing
chain
case
assembly

Cylinder head assembly

Section A - A

A

A

A A

AD

4 mm

2. Apply specified sealant to the matching area of

the cylinder head assembly and the timing chain
case assembly as shown, and install the cylinder
head cover assembly to the cylinder head
assembly.

Specified sealant: ThreBond 1217G or equiv-
alent

NOTE: Install the cylinder head cover assembly
immediately after the application of sealant.

ACA00275AE

9

7

5

10

2

3

8

1

4

6

Engine front

ACA00275

3. Tighten the cylinder head cover assembly

mounting bolts to the specified torque in the order
of the numbers shown in the illustration.

Tightening torque: 3.0

± 1.0 N⋅m

4. Tighten again the cylinder head cover assembly

mounting bolts to the specified torque in the order
of number shown in the figure.

Tightening torque: 5.5

± 0.5 N⋅m

VALVE STEM SEAL

ENGINE MECHANICAL <4A9>

11A-31

VALVE STEM SEAL

REMOVAL AND INSTALLATION

M1112008101624

CAUTION

*Remove and assemble the marked parts in each cylinder unit.

Pre-removal operation
• Engine Room Under Cover Front B and Engine Room

Side Cover (RH) Removal (Refer to GROUP 51

− Under

Cover ).

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

cle Service, Engine Coolant Replacement ).

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

Service, Engine Oil Replacement ).

• Ignition Coil and Spark Plug Removal (Refer to GROUP

16

− Ignition System, Ignition Coil ).

• Cylinder Head Cover Assembly Removal (Refer to ).

• Engine Oil Pan Removal (Refer to ).
• Timing Chain Removal (Refer to ).

Post-installation operation
• Timing Chain Installation (Refer to ).
• Engine Oil Pan Installation (Refer to ).

• Valve Clearance Check (Refer to ).

• Cylinder Head Cover Assembly Installation (Refer to ).
• Ignition Coil and Spark Plug Installation (Refer to GROUP

16

− Ignition System, Ignition Coil ).

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

Service, Engine Oil Replacement ).

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

cle Service, Engine Coolant Replacement ).

• Engine Room Under Cover Front B and Engine Room

Side Cover (RH) Installation (Refer to GROUP 51

− Under

Cover ).

AC700511

3

AD

11 ± 1 N·m

1

4

5

11 ± 1 N·m

20 ± 1 N·m

N

N

2

Apply engine oil to all
moving parts before
installation.

6*

7*

8*

9*

10*

9*

8*

6*

7*

10*

11*

11*

Removal steps

<<

A

>>

>>

D

<<

1.

Front camshaft bearing cap

<<

A

>>

>>

D

<<

2.

Camshaft bearing cap (exhaust
side)

3.

Camshaft and camshaft sprocket
assembly (exhaust side)

<<

A

>>

>>

D

<<

4.

Camshaft bearing cap (inlet side)

5.

Camshaft and V.V.T. sprocket
assembly (Inlet side)

<<

B

>>

>>

C

<<

6.

Valve tappet

<<

C

>>

>>

B

<<

7.

Valve spring retainer lock

Removal steps (Continued)

VALVE STEM SEAL

ENGINE MECHANICAL <4A9>

11A-32

REMOVAL SERVICE POINTS

<<A>> FRONT CAMSHAFT BEARING CAP / CAM-
SHAFT BEARING CAP REMOVAL
1. Temporarily install the engine oil pan which was

removed at the timing chain removal (Refer to ).

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 engine oil pan

with a piece of wood in between to support the
engine and transmission assembly.

AC700024AB

MB991454

MB991928

MB991527

AC700023AB

MB991454

MB991895

MB991527

3. Remove special tool engine hanger (MB991928

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

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

<<B>> VALVE TAPPET REMOVAL

CAUTION

• Do not use pliers or other tools to remove the

valve tappets. Always remove them by hand.

• When reusing the removed valve tappet, it

has to be installed in the same position as
before. Be sure to put a tab that shows the
original installation position on the valve tap-
pet when storing it.

AC509270

AB

Valve tappet

Remove all of the valve tappets by hand.

<<C>> VALVE SPRING RETAINER LOCK
REMOVAL

8.

Valve spring retainer

9.

Valve spring

<<

D

>>

>>

A

<<

10. Valve stem seal

>>

A

<<

11. Valve spring seat

Removal steps (Continued)

AC509271

AB

MD998772

MB992090

MB992089

VALVE STEM SEAL

ENGINE MECHANICAL <4A9>

11A-33

1. Screw in special tool retainer holder attachment

(MB992090) to special tool valve spring
compressor (MD998772), and assemble special
tool retainer holder C (MB992089).

CAUTION

When removing the valve spring retainer lock,
leave the piston of the cylinder in the TDC (Top
Dead Centre) position. The valve may fall into the
cylinder if the piston is not properly in the TDC
position.
2. Install special tool MD998772 (with special tools

MB992090 and MB992089 attached) to the
cylinder head and compress the valve spring.
Then, remove the valve spring retainer lock.

<<D>> VALVE STEM SEAL REMOVAL

AK502782AB

Valve stem seal

MB992085

Use special tool valve stem seal pliers (MB992085)
to nip the base of the stem seal (where the outside
diameter is larger) securely, and remove it by twisting
it to the left and right.

INSTALLATION SERVICE POINTS

>>A<< VALVE SPRING SEAT / VALVE STEM SEAL
INSTALLATION

AKA00416AC

1

7

2

3

4

6

5

8

Valve stem seal installer
adjustable (MB992677)

Use a special tool to install the valve stem seal,
obeying the following procedures:
1. The special tool valve stem seal installer

adjustable (MB992677) is composed of the
components shown in the illustration.
1: Chuck
2: Sleeve
3: Rock nut (small)
4: Outer pipe
5: Rock nut (large)
6: Guide pin (5.9)
7: Guide pin (4.9)
8: Cap

2. Adjust the inside chuck diameter, obeying the

following procedures.