Mitsubishi Colt Ralliart. Manual - part 6

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-21

INSTALLATION SERVICE POINTS
>>A<< OIL CONTROL VALVE FILTER
INSTALLATION

CAUTION

When installing the oil control valve filter, exer-
cise special care to avoid adhesion of foreign
objects and damage/deformation of the filter.

>>B<< O-RING/OIL CONTROL VALVE
INSTALLATION

1. Cover the oil groove of the oil control valve with a

cardboard.

CAUTION

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

the oil control valve.

CAUTION

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

control valve to the cylinder head.

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

AC312251

V.V.T. sprocket assembly

Camshaft sprocket

Inlet camshaft

Exhaust camshaft

Dowel pin

Hole

Groove

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.

AC403719

Engine front

Front camshaft
bearing cap

Camshaft bearing cap

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-22

4. 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:

± 1 N⋅m (Camshaft bearing cap mounting

bolts)

± 1 N⋅m (Front camshaft bearing cap

mounting bolts)

AC311267

Hexagon part of
the inlet camshaft

V.V.T. sprocket
assembly
mounting bolt

MB991992

5. 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)}

⋅m

± 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

Hexagon part of
the exhaust camshaft

Camshaft sprocket
mounting bolt

6. 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: 88

± 10 N⋅m

CAMSHAFT

ENGINE MECHANICAL <4A9>

11A-23

>>D<< TIMING CHAIN TENSIONER
INSTALLATION

AC311263

Timing chain tensioner

1. Install the timing chain tensioner with the pin or

the similar tool to the cylinder block through the
timing chain case hole, and tighten the timing
chain tensioner mounting bolts to the specified
torque.

Tightening torque: 8.4

± 0.6 N⋅m

2. Pull out the pin or the similar tool of the timing

chain tensioner.

>>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.

AC311269

3 mm

Timing chain case
assembly

φ 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 within 3 minutes.

Specified sealant: LOCTITE 5971 or exact
equivalent

>>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.

AC311270

Timing
chain
case
assembly

Cylinder head assembly

Section A - A

A A

φ 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 within 3 minutes.

Specified sealant: LOCTITE 5971 or exact
equivalent

AC405036