Mitsubishi Evolution X. Manual — part 200
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-47
CYLINDER HEAD AND VALVES
REMOVAL AND INSTALLATION
M1113006902039
AK702226
1
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
35 ± 2 N·m
26 ± 1 ft-lb
AC
21
Apply engine oil to
all moving parts
before installation.
→ +90˚ → +90˚
35 ± 2 N·m
26 ± 1 ft-lb
2
→ +90˚ → +90˚
Removal steps
>>E<<
1. Cylinder head bolt
>>E<<
2. Cylinder head bolt washer
>>E<<
3. Cylinder head bolt & washer
assembly
>>D<<
4. Cylinder head assembly
>>D<<
5. Cylinder head gasket
6. Engine oil control valve (OCV) filter
<<A>> >>C<<
7. Retainer lock
8. Valve spring retainer
9. Valve spring
10. Intake valve
<<A>> >>C<<
11. Retainer lock
12. Valve spring retainer
>>B<<
13. Valve spring
14. Exhaust valve
<<B>> >>A<<
15. Valve stem seal
<<B>> >>A<<
16. Valve stem seal
17. Intake valve guide
Removal steps (Continued)
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-48
Required Special Tools:
• MD998735: Valve Spring Compressor
• MB992089: Retainer Holder
• MB992085: Valve Stem Seal Pliers
• MD998737: Valve Stem Seal Installer
REMOVAL SERVICE POINTS
.
<<A>> RETAINER LOCK REMOVAL
AK502741AD
MB992089
MD998735
CAUTION
Be careful not to allow retainer holder C to interfere with
the wall of the tappet hole and to damage it.
Use a special tool MD998735 and MB992089 to compress the
valve spring and to remove the retainer lock.
NOTE: Store removed parts such as valves and springs with
tags describing cylinder No. and installed position attached for
reassembly.
.
<<B>> VALVE STEM SEAL REMOVAL
AK502782AD
Valve stem seal
MB992085
Use special tool MB992085 to firmly pinch the base (larger
external shape) of the stem seal and twist it right and left for
pulling out.
18. Exhaust valve guide
19. Intake valve seat
20. Exhaust valve seat
21. Cylinder head
Removal steps (Continued)
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-49
INSTALLATION SERVICE POINTS
.
>>A<< VALVE STEM SEAL INSTALLATION
CAUTION
• The valve stem seal must not be reused.
• Do not damage the tappet wall during assembly.
• Be sure to use a special tool to install the valve stem
seal. Poor installation causes oil loss via valve guides.
•
AK503378 AE
If oil is not applied, the valve stem seal may rise to the
surface after it is press fitted.
1. Apply a thin coat of engine oil to a new valve stem seal.
AK502742AD
MD998737
2. Use special tool MD998737 to press fit the valve stem seal
into the valve guide with the valve stem used as a guide.
.
>>B<< VALVE SPRING INSTALLATION
AK502553
Paint mark position
AD
Install the valve spring so that the painted side faces toward the
camshaft.
.
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-50
>>C<< RETAINER LOCK INSTALLATION
AK502741AD
MB992089
MD998735
Use a special tool MD998735 and MB992089 to compress the
valve spring and to install the retainer lock.
.
>>D<< CYLINDER HEAD GASKET / CYLINDER
HEAD ASSEMBLY INSTALLATION
AK602902AD
Top face of cylinder block
Degreasing
Degreasing
Bottom face of cylinder head
1. Completely remove the liquid gasket on the upper plane of
the cylinder block and the lower plane of the cylinder head.
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 place
specified in the illustration.
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