Mitsubishi Lancer Evolution IX. Manual — part 333

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-21

<<C>> VALVE SPRING RETAINER LOCKS
REMOVAL

CAUTION

When removing valve spring retainer locks, leave
the piston of each cylinder in the TDC (Top Dead
Centre) position. The valve may fall into the cylin-
der if the piston is not properly in the TDC posi-
tion.

AC201799

MD998772

AB

Use special tool valve spring compressor
(MD998772) to compress the valve spring, remove
the valve spring retainer locks.

INSTALLATION SERVICE POINTS
>>A<< EXHAUST VALVE STEM
SEALS/INLET VALVE STEM SEALS
INSTALLATION

1. Apply a small amount of engine oil to the valve

stem seals.

CAUTION

• Valve stem seals cannot be reused.
•

AC308920AB

MD998737

Valve

Valve stem
seal

Valve guide

The special tool valve stem seal installer
(MD998737) must be used to install the valve
stem seal. Improper installation could result
in oil leaking past the valve guide.

2. Use the special tool to fill a new valve stem seal in

the valve guide using the valve stem area as a
guide.

AC201542

AB

Exhaust side

Inlet side

Grey

Grey green

NOTE: Check the valve stem seal colour to iden-
tify the inlet side or exhaust side.

>>B<< VALVE SPRINGS INSTALLATION

AC211159AB

Rocker arm side

Small end

The small end of the valve spring should face the
rocker arm.

>>C<< VALVE SPRING RETAINER LOCKS
INSTALLATION

AC201799

MD998772

AB

Use special tool valve spring compressor
(MD998772) to compress the valve spring in the
same manner as removal.

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-22

>>D<< ROCKER ARM LASH ADJUSTERS
INSTALLATION

CAUTION

If the rocker arm lash adjuster is reused, always
clean and check it before installation. (Refer to
GROUP 11B, Rocker Arms and Camshaft

−

Inspection

P.11B-39

).

>>E<< EXHAUST CAMSHAFT/INLET
CAMSHAFT INSTALLATION

1. Remove sealant remained on the cylinder head.
2. Apply engine oil to the cam and the journal of the

camshaft.

CAUTION

Do not install wrong camshaft on the side of inlet
or exhaust. The exhaust camshaft has a slit at the
rear surface.

AC407425

Engine front

<Inlet side>

<Exhaust side>

Slit

Slit

AC

3. Install the camshaft to the cylinder head.

>>F<< CAMSHAFT BEARING CAPS, NO.
4/CAMSHAFT BEARING CAPS, NO.
3/CAMSHAFT BEARING CAPS, NO.
5/CAMSHAFT BEARING CAPS, NO.
2/CAMSHAFT BEARING CAPS,
REAR/CAMSHAFT BEARING CAPS,
FRONT INSTALLATION

AC201459AC

Dowel pin

Exhaust side

Inlet side

Approximately 4˚

1. Set the dowel pin of the camshaft to the position

as shown in the illustration.

AC201460

E 4

AB

Bearing
cap No.

Identification of
inlet side and
exhaust side

Engine front

2. Since the shape of camshaft bearing caps No.2

−

5 is identical, check the identification marks so
that the bearing cap No., inlet side, or exhaust
side is installed in the direction shown in the
illustration.

Identification mark (engraved on the front
and bearing caps No.2

− 5)

I: Inlet side
E: Exhaust side

AC201461AC

Engine front

3. Apply sealant to the positions (8 areas) of the

upper side of the cylinder head as shown in the
illustration.

Specified sealant: MITSUBISHI GENUINE
PART MD970389 or equivalent

AC406643

AE

<Inlet side>

Engine front

Front
marking

AC406642

AF

<Exhaust side>

Engine front

Front
marking

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-23

4. Position the camshaft bearing caps, rear in the

direction as shown in the illustration for
installation.

5. Check the identification marks on the camshaft

bearing caps, front so that inlet side and exhaust
side is installed in the same way as that of bearing
caps No.2

− 5.

6. Tighten the bearing cap mounting bolts increasing

the pressure in 2 to 3 times and finally tighten to
the specified torque.

Tightening torque: 20

± 1 N⋅m

7. Ensure that the rocker arms are installed properly.

NOTE: Remove an excess sealant completely.

>>G<< CAMSHAFT OIL SEALS
INSTALLATION

AC102323AB

MD998713

1. Apply engine oil to the entire inner diameter of the

oil seal lip.

2. Use special tool camshaft oil seal installer

(MD998713) to press-fit the oil seals.

>>H<< CAMSHAFT SPROCKET (INLET
SIDE) INSTALLATION

AC500123AC

Engine front

Camshaft
sprocket

(Engine oil)

1. Apply engine oil to the tip of the camshaft and the

camshaft installation side of the camshaft
sprocket.

2. Align the dowel pin hole of the camshaft sprocket

with the dowel pin of the camshaft, and install the
camshaft sprocket to the camshaft.

3. While holding the hexagonal area of the camshaft

with a wrench, check that the camshaft sprocket
does not turn.
NOTE: This is necessary, because you cannot
confirm that the camshaft dowel pin is inserted
into the pin hole.

AC504842AB

Engine front

Camshaft
sprocket

(Engine oil)

4. Apply the engine oil to the threads and the face of

the camshaft sprocket mounting bolt. Then fix the
camshaft with a wrench in the same way as
removal and tighten the camshaft sprocket
mounting bolt to the specified torque.

Tightening torque: 65

± 5 N⋅m

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-24

>>I<< CAMSHAFT SPROCKET (EXHAUST
SIDE) INSTALLATION

AC407095AC

1. Hold the hexagon part of the camshaft with a

wrench in the same manner as removal.

2. Tighten the camshaft sprocket mounting bolts to

the specified torque.

Tightening torque: 89

± 9 N⋅m

>>J<< CAMSHAFT POSITION SENSOR
SUPPORT INSTALLATION

1. Remove sealant from the camshaft position

sensor support and cylinder head surfaces.

AC201463

3 mm

AC

<Exhaust side>

AC406663

3 mm

AC

<Inlet side>

2. Apply the sealant to the camshaft position sensor

support flange in a continuous bead as shown in
the illustration.

Specified sealant: MITSUBISHI GENUINE
PART MD970389 or equivalent

NOTE: Install the camshaft position sensor sup-
port within 15 minutes after applying liquid gasket.

3. Install the camshaft position sensor support to the

cylinder head.

CAUTION

Wait at least one hour. Never start the engine or
let engine oil or coolant touch the adhesion sur-
face during that time.
4. Tighten the camshaft position sensor support

mounting bolts to the specified torque.

Tightening torque: 14

± 1 N⋅m

>>K<< CAMSHAFT POSITION SENSING
CYLINDER (INLET SIDE) INSTALLATION

AC406644

AE

(4˚ 1')

Dowel pin

Vane

1. Set the dowel pin of the inlet camshaft to the

position (No.1 cylinder at compression TDC) as
shown in the illustration.

2. Tighten the camshaft position sensing cylinder

mounting bolts to the specified torque.

Tightening torque: 22

± 4 N⋅m

>>L<< CAMSHAFT POSITION SENSING
CYLINDER (EXHAUST SIDE)
INSTALLATION

AC201464AB

Dowel pin

Vane (large)

Vane (small)

Approximately 45˚

1. Set the dowel pin of the exhaust camshaft to the

position (No.1 cylinder at compression TDC) as
shown in the illustration.
NOTE: Use the force of the exhaust valve spring
to rotate anti-clockwise.