Mitsubishi Lancer (4A9 engine). Manual — part 28

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-26

2. While holding the inlet camshaft hexagonal area

with a wrench or a similar tool, slightly turn the
exhaust camshaft clockwise to tighten the timing
chain at the timing chain tensioner side and
shorten the plunger of the timing chain tensioner.

AC311263

AB

Timing chain tensioner

Pin

3. With the plunger of the tensioner shortened, insert

a pin or a similar tool (3 mm or less in diameter) to
the hole shown in the illustration of the timing
chain tensioner.

CAUTION

Do not turn the crankshaft after removing the tim-
ing chain tensioner.
4. Loosen the timing chain tensioner mounting bolts,

and remove the timing chain tensioner from the
timing chain case hole.

<<C>> CAMSHAFT SPROCKET/ V.V.T.
SPROCKET ASSEMBLY/FRONT CAMSHAFT
BEARING CAP/CAMSHAFT BEARING CAP/
CAMSHAFT REMOVAL

AC312249

AB

Timing chain

Cable band

Camshaft sprocket

1. Fix the camshaft sprocket and the timing chain

using a cable band or a similar tool.

AC311264

AB

Hexagon part of
the exhaust camshaft

Camshaft sprocket mounting bolt

2. While holding the exhaust camshaft hexagonal

area with a wrench or a similar tool, loosen the
camshaft sprocket mounting bolt.

AC311265

AC

Hexagon part of
the inlet camshaft

V.V.T. sprocket
assembly
mounting bolt

MB991992

3. While holding the inlet camshaft hexagonal area

using a wrench or a similar tool, use special tool
torque wrench adapter (MB991992) to loosen the
V.V.T. sprocket assembly mounting bolt.

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

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-27

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.

CAUTION

Do not turn the crankshaft after removing the
camshaft sprocket assembly with the timing
chain.

AC312250

AB

Exhaust
camshaft

Camshaft sprocket
mounting bolt

Camshaft sprocket and
timing chain assembly

5. Slightly raise the exhaust camshaft with the

camshaft sprocket and timing chain assembly
from the cylinder head, remove the camshaft
sprocket mounting bolt, and disconnect the
camshaft sprocket and timing chain assembly
from the exhaust camshaft.

6. In the same way as Step 5, disconnect the V.V.T.

sprocket assembly and timing chain assembly
from the inlet camshaft.

CAUTION

After disconnecting the camshaft sprocket and
the V.V.T. sprocket assembly (with the timing
chain for each) from the camshaft, do not dislo-
cate the camshaft sprocket, the V.V.T. sprocket
assembly, and the timing chain.
7. After removal, place the camshaft sprocket and

timing chain assembly, and the V.V.T. sprocket
assembly and timing chain assembly on the
timing chain case assembly.

<<D>> OIL FEEDER CONTROL VALVE/OIL
FEEDER CONTROL VALVE FILTER REMOVAL

CAUTION

After removing the oil feeder control valve and
the oil feeder control valve filter, be careful that
no dust or other objects enter the oil passage in
the cylinder head.

INSTALLATION SERVICE POINTS

>>A<< OIL FEEDER CONTROL VALVE FILTER
INSTALLATION

CAUTION

When installing the oil feeder control valve filter,
exercise special care to avoid adhesion of for-
eign objects and damage/deformation of the fil-
ter.

>>B<< O-RING/OIL FEEDER CONTROL VALVE
INSTALLATION
1. Cover the oil groove of the oil feeder control valve

with a cardboard.

CAUTION

When installing the O-ring to the oil feeder con-
trol valve, take care not to damage the O-ring.
2. Apply the engine oil to the O-ring and install it to

the oil feeder control valve.

CAUTION

When installing the oil feeder control valve to the
cylinder head, take care not to damage the O-
ring.
3. Apply the engine oil to the O-ring and install the oil

feeder control valve to the cylinder head.

>>C<< CAMSHAFT/CAMSHAFT BEARING CAP/
FRONT CAMSHAFT BEARING CAP/ V.V.T.
SPROCKET ASSEMBLY/CAMSHAFT SPROCKET
INSTALLATION

AC312251

AC

V.V.T. sprocket assembly

Camshaft sprocket

Inlet camshaft

Exhaust camshaft

Dowel pin

Dowel pin

Hole

Groove

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-28

1. First, lift the V.V.T. sprocket assembly side of the

camshaft sprocket, V.V.T. sprocket assembly and
the timing chain assembly. Then align the dowel
pin of the inlet camshaft with the V.V.T. sprocket
assembly hole, and assemble the inlet camshaft
and the V.V.T. sprocket assembly. Temporarily
tighten the mounting bolt.

2. Next, lift the camshaft sprocket side of the

camshaft sprocket, V.V.T. sprocket assembly and
the timing chain assembly. Then align the dowel
pin of the exhaust camshaft with the camshaft
sprocket groove, and assemble the exhaust
camshaft and the camshaft sprocket. Temporarily
tighten the mounting bolt.

3. Place the inlet camshaft and exhaust camshaft on

the installing location of the cylinder head.

AC205417

E 4

AB

Bearing cap No.

Identification of
inlet side and
exhaust side

Engine front

Front mark

4. The No.2 to No.5 bearing caps are equally

shaped for both the inlet and exhaust camshafts.
Be sure to correctly install them by referring to the
identification marks.

Identification mark (stamped on the front

and No.2 to No.5 bearing caps)

I: Inlet
E: Exhaust

AC403719

AE

3

8

7

2

8

7

1

5

6

5

6

3

4

4

3

1

2

2

1

Engine front

Front camshaft
bearing cap

Camshaft bearing cap

Camshaft bearing cap

5. Tighten each camshaft bearing cap mounting

bolts to the specified torque in the order shown,
and then tighten the front camshaft bearing cap
mounting bolts as well.

Tightening torque:

11

± 1 N⋅m (Camshaft bearing cap mounting

bolts)

20

± 1 N⋅m (Front camshaft bearing cap mount-

ing bolts)

AC311267

AC

Hexagon part of
the inlet camshaft

V.V.T. sprocket
assembly
mounting bolt

MB991992

6. While holding the inlet camshaft hexagonal area

using a wrench or a similar tool, use special tool
torque wrench adapter (MB991992) to tighten the
V.V.T. sprocket assembly mounting bolt to the
specified torque. Since the V.V.T. sprocket
assembly mounting bolt is tightened by special
tool (MB991992), calculate the tightening torque
by the following formula.

Tightening torque: (65

± 5) × {L ÷ (L + 150)}

N

⋅m

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-29

65

± 5: Tightening torque of the V.V.T. sprocket

assembly mounting bolt (unit: N

⋅m)

L: Distance between the centre of a torque

wrench drive and of its handle (unit: mm)

150: Length of special tool (unit: mm)

AC311268

AB

Hexagon part of
the exhaust camshaft

Camshaft sprocket
mounting bolt

7. While holding the exhaust camshaft hexagonal

area using a wrench or similar tool, tighten the
camshaft sprocket mounting bolt to the specified
torque.

Tightening torque: 92

± 13 N⋅m

>>D<< TIMING CHAIN TENSIONER
INSTALLATION

AC312123AB

Timing chain tensioner

Cam

Plunger

AC613339AB

Timing chain tensioner

Pin

Plunger

1. Install the timing chain guide, the tensioner lever

assembly, and the timing chain tensioner.

NOTE: When the plunger of the timing chain ten-
sioner is stretched, remove the pin or the similar
tool. While pressing the cam in the lower area of
the timing chain tensioner, press and shorten the
plunger to keep the status with the pin or the simi-
lar tool.

2. Tighten the timing chain tensioner mounting bolts

to the specified torque.

Tightening torque: 9.5

± 2.5 N⋅m

3. After installing the timing chain tensioner, confirm

that the timing marks of each sprocket are aligned
with the TDC of No.1 cylinder, and the marked link
plate (blue-coloured area) of the timing chain is
aligned with the specified position of each
sprocket. Then pull out the pin or a similar tool of
the timing chain tensioner, and apply tension to
the timing chain.

>>E<< TIMING CHAIN TENSIONER COVER
INSTALLATION
1. Remove the sealant from the installation face of

the timing chain tensioner cover 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.

AC311269

3 mm

Timing chain case
assembly

AC

2 mm

2. Apply a bead of the specified sealant to the

mating surface of the timing chain case assembly.
Then, install the timing chain tensioner cover to
the timing chain case assembly.

Specified sealant: ThreeBond 1217G or
equivalent

NOTE: Install the timing chain tensioner cover
immediately after the application of sealant.