Mitsubishi Evolution X. Manual - part 174

CAMSHAFT

TSB Revision

ENGINE MECHANICAL

11A-27

Required Special Tool:

• MB992103: Chain Tension Release Bar

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D

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F

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11. Front camshaft bearing cap 

assembly

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E

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12. Camshaft bearing

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E

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D

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13. Oil feeding camshaft bearing cap 

(exhaust side)

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E

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D

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14. Camshaft bearing cap (exhaust 

side)

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E

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D

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15. Camshaft bearing cap (exhaust 

side)

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E

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D

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16. Thrust camshaft bearing cap 

(exhaust side)

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F

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E

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17. Camshaft and camshaft sprocket 

assembly (exhaust side)

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G

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B

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18. Camshaft sprocket bolt

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B

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19. Camshaft sprocket (exhaust side)

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B

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20. Camshaft (exhaust side)

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E

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21. Camshaft bearing

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E

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D

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22. Oil feeding camshaft bearing cap 

(intake side)

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E

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D

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23. Camshaft bearing cap (intake 

side)

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E

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D

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24. Camshaft bearing cap (intake 

side)

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E

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>>

D

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25. Thrust camshaft bearing cap 

(intake side)

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C

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26. Camshaft and camshaft sprocket 

assembly (intake side)

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G

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>>

B

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27. Camshaft sprocket bolt

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B

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28. Camshaft sprocket (intake side)

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B

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29. Camshaft (intake side)

Intake oil feeder control valve 
removal steps 

4.

Intake oil feeder control valve 
connector connection

•

Drive belt (Refer to 

P.11A-21

)

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H

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30. Power steering oil pump 

assembly

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I

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A

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31. Intake oil feeder control valve

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A

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32. O-ring

Exhaust oil feeder control valve 
removal steps 

5.

Exhaust oil feeder control valve 
connector connection

33. Exhaust oil feeder control valve 

heat protector

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I

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A

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34. Exhaust oil feeder control valve

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A

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35. O-ring

Camshaft removal steps 

CAMSHAFT

TSB Revision

ENGINE MECHANICAL

11A-28

REMOVAL SERVICE POINTS

.

<<A>> ROCKER COVER ASSEMBLY REMOVAL

Loosen the rocker cover assembly mounting bolts in the order 
of number shown in the figure, and remove the rocker cover 
assembly.

.

<<B>> CYLINDER NO. 1 COMPRESSION TOP 
DEAD CENTER SETTING

CAUTION

Turn the crankshaft clockwise.
1. Turn the crankshaft clockwise so that the camshaft sprocket 

timing marks become horizontal to the cylinder head upper 
surface, and set the cylinder No. 1 to the top dead center of 
compression. At this time, check that the crankshaft pulley 
timing mark is in the 0-degree position of the ignition timing 
indicator of the timing chain case assembly. 

2. Put paint marks on both the camshaft sprocket and timing 

chain at the position of camshaft sprocket timing chain 
mating mark (circular hole).

.

AC506743

AD

3

6

1

9

5

2

10

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8

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11

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Engine front

AC506744

Paint 
markings

Camshaft sprocket 
timing marks

Timing chain
mating mark

Timing chain
mating mark

AC

Cylinder head upper surface

CAMSHAFT

TSB Revision

ENGINE MECHANICAL

11A-29

<<C>> CAMSHAFT AND CAMSHAFT SPROCKET 
ASSEMBLY (EXHAUST SIDE) REMOVAL 
PREPARATORY OPERATION

1. Insert a precision flat-tipped screwdriver through the service 

hole of the timing chain case, press up the timing chain 
tensioner ratchet to unlock, and keep the timing chain 
tensioner with that state.
NOTE: Lightly press down the tail end of the precision 
flat-tipped screwdriver to press up the tip of the precision 
flat-tipped screwdriver inserted to the timing chain tensioner 
to unlock.

AC509155

AC

Section A-A

A

A

Precision flat-tipped 
screwdriver

Service hole

Crankshaft pulley

Service hole

Ratchet

Precision flat-tipped screwdriver

Ratchet
release hole

Timing chain
tensioner

Ratchet

Ratchet
release hole

Timing chain tensioner
construction diagram

CAMSHAFT

TSB Revision

ENGINE MECHANICAL

11A-30

CAUTION

• When inserting special tool MB992103 into the timing 

chain case assembly inside, pay attention to the posi-
tion 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 1 again to unlock the timing chain tensioner and 
insert the special tool.