Mitsubishi Evolution X. Manual - part 181

CRANKSHAFT OIL SEAL

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ENGINE MECHANICAL

11A-55

REMOVAL SERVICE POINT

.

<<A>> FLYWHEEL BOLTS REMOVAL

Fix the flywheel using special tool MB991883, and loosen the 
flywheel bolts.

INSTALLATION SERVICE POINTS

.

>>A<< CRANKSHAFT REAR OIL SEAL CASE 
ASSEMBLY INSTALLATION

1. Remove all the traces of sealant adhering to the cylinder 

block and ladder frame using a remover or others. Then, 
degrease them using quick-drying degreasing agent (white 
gasoline).

2. Apply the sealant without any gap to the cylinder block and 

ladder frame as shown in the figure. Within three minutes, 
install the crankshaft rear oil seal case assembly.

Specified sealant: Three bond 1227D or equivalent

3. Apply a small amount of engine oil to the entire inner 

diameter of the oil seal lip, and install the crankshaft rear oil 
seal case assembly.

CAUTION

Do not apply oil or water to the sealant-applied area or 
start up the engine within 2 hours after the installation of 
the crankshaft rear oil seal.
4. Tighten the crankshaft rear oil seal case assembly mounting 

bolts to the specified torque.

Tightening torque: 10 

± 2 N⋅ m (89 ± 17 in-lb)

.

>>B<< FLYWHEEL/FLYWHEEL HUB 
<TC-SST>/FLYWHEEL BOLTS INSTALLATION

1. Remove the engine oil and deposits from the flywheel bolt 

threads, crankshaft tapped hole, and flywheel.

2. Install the flywheel and flywheel hub <TC-SST> to the 

crankshaft.

AC506761 AD

MB991883

Cylinder block

AC704960AC

Cylinder block

Ladder frame

φ 2 mm or φ 3 mm
(

φ 0.08 in or φ 0.12 in)

1mm (0.04in)

CRANKSHAFT OIL SEAL

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ENGINE MECHANICAL

11A-56

3. Use special tool MB991883 to secure the flywheel assembly 

in the same manner as removal.

4. Apply a small amount of engine oil to the bearing surfaces of 

flywheel bolts and crankshaft tapped hole, and apply the 
sealant to the bolt threads of flywheel.

Specified sealant: Three bond 1324 or equivalent

5. Tighten flywheel bolts to temporary torque 40 N

⋅ m (30 ft-lb) 

in the order shown in the illustration.

6. Tighten flywheel bolts to specified torque in the order shown 

in the illustration.

Tightening torque: 130 N

⋅ m (96 ft-lb)

.

>>C<< CRANKSHAFT FRONT OIL SEAL 
INSTALLATION

1. Apply a small amount of engine oil to the entire inner 

diameter of the oil seal lip.

CAUTION

When installing the crankshaft oil seal, be careful to avoid 
damage to the crankshaft front oil seal.
2. Using special tool MB991448, press in the crankshaft front 

oil seal up to the chamfered surface of timing chain case.

AC506761 AD

MB991883

Cylinder block

AC609795AE

AC609796

1

2

3

4

5

6

7

AB

AC506763 AC

MB991448

Timing chain case

CYLINDER HEAD GASKET

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ENGINE MECHANICAL

11A-57

CYLINDER HEAD GASKET

REMOVAL AND INSTALLATION

M1112004002770

Pre-removal operation
• Fuel Line Pressure Reduction [Refer to GROUP 13A, 

On-vehicle Service 

− Fuel Pump Connector Disconnection 

(How to Reduce Pressurized Fuel Lines) 

P.13A-901

].

• Engine Room Under Cover Front A, B, Engine Room 

Under Cover Center and Engine Room Side Cover (RH) 

Removal (Refer to GROUP 51, Under Cover 

P.51-16

).

• Engine Coolant Draining (Refer to GROUP 14, On-vehicle 

Service 

− Engine Coolant Replacement 

P.14-17

).

• Air Cleaner Assembly Removal (Refer to GROUP 15, Air 

Cleaner 

P.15-10

).

• Charge Air Cooler Intake Hose A, B and Charge Air 

Cooler Intake Pipe A Removal (Refer to GROUP 15, 

Charge Air Cooler 

P.15-15

).

• Ignition Coil Removal (Refer to GROUP 16, Ignition Sys-

tem 

− Ignition Coil 

P.16-39

).

• Strut Tower Bar Removal (Refer to GROUP 42A, Strut 

Tower Bar 

P.42A-15

).

• Exhaust Manifold and Turbocharger Assembly Removal 

(Refer to GROUP 15, Exhaust Manifold and Turbocharger 

Assembly 

P.15-16

).

• Throttle Body Assembly Removal (Refer to GROUP 13A, 

Throttle Body Assembly 

P.13A-918

).

• Water Pump Removal (Refer to GROUP 14, Water Pump 

P.14-25

).

Post-installation operation
• Water Pump Installation (Refer to GROUP 14, Water 

Pump 

P.14-25

).

• Throttle Body Assembly Installation (Refer to GROUP 

13A, Throttle Body Assembly 

P.13A-918

).

• Exhaust Manifold and Turbocharger Assembly Installation 

(Refer to GROUP 15, Exhaust Manifold and Turbocharger 

Assembly 

P.15-16

).

• Strut Tower Bar Installation (Refer to GROUP 42A, Strut 

Tower Bar 

P.42A-15

).

• Ignition Coil Installation (Refer to GROUP 16, Ignition 

System 

− Ignition Coil 

P.16-39

).

• Charge Air Cooler Intake Hose A, B and Charge Air 

Cooler Intake Pipe A Installation (Refer to GROUP 15, 

Charge Air Cooler 

P.15-15

).

• Air Cleaner Assembly Installation (Refer to GROUP 15, 

Air Cleaner 

P.15-10

).

• Engine Coolant Refilling (Refer to GROUP 14, On-vehicle 

Service 

− Engine Coolant Replacement 

P.14-17

).

• Fuel Leak Check

• Engine Room Under Cover Front A, B, Engine Room 

Under Cover Center and Engine Room Side Cover (RH) 

Installation (Refer to GROUP 51, Under Cover 

P.51-16

).

CYLINDER HEAD GASKET

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ENGINE MECHANICAL

11A-58

AC704359AC

1

2

3

4

5

7

8

6

9

10

11

12

13

15

17

10 ± 2 N·m
89 ± 17 in-lb

23 ± 6 N·m
17 ± 4 ft-lb

N

N

14

16

(Engine oil)

23 ± 6 N·m
17 ± 4 ft-lb

23 ± 6 N·m
17 ± 4 ft-lb

Removal steps 

1.

Control wiring harness 
connection

2.

Radiator upper hose connection

3.

Radiator lower hose connection

4.

Heater hose connection

<<

A

>>

>>

F

<<

5.

Fuel high-pressure hose 
connection

6.

Fuel return hose connection

7.

Turbocharger by-pass valve 
purge hose connection

8.

Canister vacuum hose 
connection

9.

Brake booster vacuum hose 
connection

10. Water pump intake pipe
11. O-ring
12. Engine oil level gauge
13. O-ring
14. Starter wiring harness clamp
15. Intake manifold stay (front)
16. Starter wiring harness clamp
17. Intake manifold stay (rear)

Removal steps (Continued)