Mitsubishi Evolution X. Manual — part 177

CAMSHAFT

TSB Revision

ENGINE MECHANICAL

11A-39

CAUTION

• When inserting special tool MB992103 into the timing

chain case assembly, pay attention to the position of
the timing chain to avoid damage to the timing chain
and timing chain tension side guide. Do not insert the
special tool beyond its insertion guideline.

• If unlocking the timing chain tensioner is insufficient,

the special tool cannot be inserted to the insertion
guideline. Do not insert the special tool forcibly, follow
Step 2 again to unlock the timing chain tensioner and
insert the special tool.

CAMSHAFT

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ENGINE MECHANICAL

11A-40

3. With the timing chain tensioner unlocked, insert special tool

MB992103 inside the timing chain case assembly along the
tension side of the timing chain until the insertion guide line
aligns with the upper surface of the timing chain case
assembly (Figure A).
NOTE: With the timing chain tensioner unlocked, insert the
special tool along the tension side of the timing chain,
according to the special tool top shape. The special tool can
be inserted smoothly to the position where the special tool
insertion guideline aligns with the timing chain case assem-
bly top surface, and the spread timing chain tension side
guide can be hold.

4. With the special tool inserted up to the insertion guide line,

press the special tool against the intake side camshaft
sprocket (Figure B) and spread and hold the timing chain
tension side guide (Figure C).

5. Remove the flat-tipped precision screwdriver unlocking the

timing chain tensioner.

6. Pull up the camshaft and camshaft sprocket assembly

(exhaust side) mounting area of the timing chain (Figure D)
to provide allowance for easy installation of the camshaft
and camshaft sprocket assembly (exhaust side) to the
timing chain.

AC705456AC

Timing chain

MB992103

Insertion standard line

AC509177

AC508125

AD

MB992103

MB992103

Timing chain
tensioner

Timing chain
tension side guide

Timing chain
tension
side guide

Timing chain
(tension side)

Camshaft
sprocket
(intake side)

Timing chain
(exhaust camshaft and
camshaft sprocket
assembly side)

A

B

C

D

CAMSHAFT

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ENGINE MECHANICAL

11A-41

CAUTION

When installing the camshaft and camshaft sprocket
assembly (exhaust side), be careful not to let the camshaft
bearing which is installed to the front cam bearing deviate
from its position.
7. Align the exhaust side paint mark of the timing chain which

was put at removal with the paint mark of the exhaust side
camshaft sprocket, and install the timing chain to the
camshaft sprocket.

8. Install the camshaft and camshaft sprocket assembly

(exhaust side) to the cylinder head.

9. Remove the special tool inserted into the timing chain case

assembly inside.

.

>>F<< FRONT CAMSHAFT BEARING CAP
ASSEMBLY INSTALLATION

CAUTION

When the mounting bolts are tightened with the front cam-
shaft bearing cap tilted, the front camshaft bearing cap is
damaged. Install the front camshaft bearing cap properly
to the cylinder head and camshaft.
1. Install the front camshaft bearing cap to the cylinder head,

and temporarily tighten the camshaft bearing front cap to the
specified torque in the order of the figure (1).

Tightening torque: 17

± 3 N⋅ m (13 ± 2 ft-lb)

2. Tighten the front camshaft bearing cap again to the specified

torque in the order of the figure (2).

Tightening torque: 30

± 2 N⋅ m (23 ± 1 ft-lb)

3. After installing the front camshaft bearing cap, check that the

paint marks of camshaft sprocket and of timing chain, the
timing mark of crankshaft pulley, and the T-mark position of
ignition timing indicator are aligned correctly.

.

>>G<< ROCKER COVER ASSEMBLY
INSTALLATION

1. Wipe off the sealant on the mating surface of the rocker

cover assembly and the cylinder head and timing chain case
assembly, and degrease the surface where the sealant is
applied by white gasoline or the like.

AC506752

AB

Paint markings
(exhaust side)

AC511062

AC

4

3

2

1

4

3

2

1

(1)

(2)

Engine front

Front
camshaft
bearing
cap
assembly

CAMSHAFT

TSB Revision

ENGINE MECHANICAL

11A-42

2. Apply sealant to the joint between the cylinder head and

timing chain case assembly as shown in the figure and
install the rocker cover assembly to the cylinder head.

Specified sealant: Three bond 1217G or equivalent

NOTE: Install the rocker cover assembly within 3 minutes
after the application of sealant.

3. Tighten the rocker cover assembly mounting bolts to the

specified torque in the order of number shown in the figure.

Tightening torque: 3.0

± 1.0 N⋅ m (27 ± 8 in-lb)

4. Tighten again the rocker 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 (49 ± 4 in-lb)

AC506753

AF

Cylinder head

Timing chain case assembly

φ 4 mm
(

φ 0.14 in)

φ 4 mm
(

φ 0.14 in)

AC506743

AE

3

6

1

9

5

10

4

8

7

11

13

14

15

16

17

18

2

12

Engine front