Mitsubishi Evolution X. Manual - part 202

CYLINDER HEAD AND VALVES

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ENGINE OVERHAUL

11B-55

REPLACEMENT PROCEDURE OF VALVE GUIDE

1. Pull out the valve guide with a press toward the cylinder 

block side.

2. Ream the valve guide hole of the cylinder head to match it 

with the diameter of the oversize valve guide to be press 
fitted.

CAUTION

Do not use a valve guide with the same size as that of the 
pulled out valve guide because it cannot be press fitted.

Valve guide bore diameter

0.25 O.S.: 11.23 

− 11.25 mm (0.442 − 0.443 inch)

AK703735AC

14.6 – 15.2 mm
(0.57 – 0.60 in)

3. Press fit the valve guide to the illustrated dimension.

Standard value: 14.6 

− 15.2 mm (0.57 − 0.60 inch)

NOTE: Press fit the valve guide from the cylinder head top 
surface.

4. After pressing fit the valve guide, insert a new valve to check 

for sliding.

OIL PUMP CHAIN

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ENGINE OVERHAUL

11B-56

OIL PUMP CHAIN

REMOVAL AND INSTALLATION

M1113033700107

AK702225

26 ± 1 N·m
19 ± 1 ft-lb

26 ± 2 N·m
19 ± 1 ft-lb

23 ± 2 N·m
17 ± 1 ft-lb

54 ± 5 N·m
40 ± 3 ft-lb

32 ± 2 N·m
24 ± 1 ft-lb

10 ± 2 N·m
89 ± 17 in-lb

10 ± 2 N·m
89 ± 17 in-lb

10 ± 2 N·m
89 ± 17 in-lb

Apply engine oil to
all moving parts
before installation.

40 N·m
30 ft-lb 

130 N·m
96 ft-lb

→

40 N·m
30 ft-lb 

130 N·m
96 ft-lb

→

1

2

3

4

11

8

12

7

AC

10

13

15

6

5

14

17

16

9

Removal steps 

1. Silicon ring <TC-SST>

<<A>> >>E<<

2. Flywheel bolt <TC-SST>
3. Flywheel hub <TC-SST>
4. Flywheel <TC-SST>

<<A>> >>E<<

5. Flywheel bolt <M/T>
6. Flywheel <M/T>

>>D<<

7. Rear oil seal
8. Oil pump chain guide
9. Oil pump tensioner lever

>>C<<

10. Oil pump chain

<<B>> >>C<<

11. Oil pump sprocket
12. Oil pump case

>>B<<

13. Crankshaft sprocket
14. Oil cooler by-pass valve

<<C>> >>A<<

15. Ladder frame
16. Check valve
17. Oil jet

Required Special Tools:

• MB991346: Top Cover Wrench

• MB991883: Flywheel Stopper

Removal steps (Continued)

OIL PUMP CHAIN

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ENGINE OVERHAUL

11B-57

REMOVAL SERVICE POINTS

.

<<A>> DRIVE PLATE BOLT / FLYWHEEL BOLT 
REMOVAL

AK703300

MB991883

AC

1. Use special tool MB991883 to secure the drive plate or 

flywheel.

2. Remove the drive plate bolts or flywheel bolts.

.

<<B>> OIL PUMP SPROCKET REMOVAL

AK703732AC

MB991346

Oil pump sprocket

Fix the oil pump sprocket with a special tool MB991346, loosen 
a center bolt, and remove the oil pump sprocket.

.

<<C>> LADDER FRAME REMOVAL

AK502755AF

1. Pry the illustrated position with a screwdriver.

AK502756

2. If the ladder frame does not come off, insert a flat blade 

screwdriver into the gap between the ladder frame and 
bearing cap as shown in the illustration and lightly pry it to 
remove the ladder frame.

OIL PUMP CHAIN

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ENGINE OVERHAUL

11B-58

INSTALLATION SERVICE POINTS

.

>>A<< LADDER FRAME INSTALLATION

CAUTION

Be sure to remove liquid gasket that has entered mounting 
holes.
1. Completely remove liquid gasket adhering to the cylinder 

block and ladder frame.

CAUTION

Sufficiently check that there is no residual oil on the place 
where degreasing is performed. If fingerprints are left, do 
not touch it with bare hands after the degreasing, since the 
oils from your fingers will harm the seal ability.
2. Using white gasoline and so on, degrease the surface where 

the liquid gasket is applied and the contact surface between 
the cylinder block and ladder frame.

AK702198AC

A

-A

A

A

A

3.0 mm (0.12 in)

0 – 2.0 mm
(0 – 0.08 in)

1.0 mm (0.04 in)

3. Squeeze liquid gasket (Three bond 1217G [Mitsubishi 

Genuine Part No.1000A923] or equivalent) of 

φ2.0 to 3.0 mm 

(0.08 to 0.12 inch) in thickness and apply it to the illustrated 
position of the ladder frame.

AK702199AC

4

1

1

3

3

2

2

6

4

3

5

5

6

4. Tighten the ladder frame to the specified torque in the order 

shown in the illustration.

Specified torque: 26 

± 1 N⋅ m (19 ± 1 ft-lb)

.