Mitsubishi Montero Sport (2004+). Manual — part 138
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-27
CYLINDER HEAD AND VALVES
REMOVAL AND INSTALLATION
M1113006900516
AKX00644
108 ± 5 N·m
80 ± 4 ft-lb
0 N·m
0 in-lb
108 ± 5 N·m
80 ± 4 ft-lb
1
5
2
6
7
13
3
14
9
11
16
17
19
12
10
21
18
22
20
8
4
AB
APPLY ENGINE OIL
TO ALL MOVING
PARTS BEFORE
INSTALLATION.
15
→
→
REMOVAL STEPS
<<A>> >>D<<
1. CYLINDER HEAD BOLT
2. WASHER
3. CYLINDER HEAD ASSEMBLY
4. CYLINDER HEAD GASKET
<<B>> >>C<<
5. RETAINER LOCK
6. VALVE SPRING RETAINER
>>B<<
7. VALVE SPRING
8. INLET VALVE
<<B>> >>C<<
9. RETAINER LOCK
10. VALVE SPRING RETAINER
>>B<<
11. VALVE SPRING
12. EXHAUST VALVE
>>A<<
13. VALVE STEM SEAL
14. VALVE SPRING SEAT
>>A<<
15. VALVE STEM SEAL
16. VALVE SPRING SEAT
17. INLET VALVE GUIDE
18. SNAP RING
19. EXHAUST VALVE GUIDE
20. INLET VALVE SEAT
21. EXHAUST VALVE SEAT
22. CYLINDER HEAD
REMOVAL STEPS (Continued)
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-28
Required Special Tools:
• MD998051: Cylinder Head Bolt Wrench
• MD998735: Valve Spring Compressor
• MD998772: Valve Spring Compressor
• MD998774: Valve Stem Seal Installer
REMOVAL SERVICE POINTS
.
<<A>> CYLINDER HEAD BOLT REMOVAL
Use special tool MD998051 to loosen the cylinder head bolt.
.
<<B>> RETAINER LOCK REMOVAL
1. Using special tool MD998735 or MD998772, compress the
spring.
2. Remove the retainer locks.
INSTALLATION SERVICE POINTS
.
>>A<< VALVE STEM SEAL INSTALLATION
1. Install the valve spring seat.
AK302682AB
MD998051
AK100166
MD998735
AB
AKX00617
MD998772
AB
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-29
CAUTION
• Valve stem seals for intake valves and for exhaust
valves are different. Be sure to install the correct ones.
• Valve stem seal identification color
Intake: GRAY
Exhaust: GRAY GREEN
CAUTION
Always use the special tool to install the valve stem seal.
Improperly installed valve stem seals may leak oil.
2. Using special tool MD998774, install a new stem seal to the
valve guide.
.
>>B<< VALVE SPRING INSTALLATION
Install the valve spring end with its identification color toward
the spring retainer.
.
AKX00642
EXHAUST
RUBBER COLOR:
GRAY
RUBBER COLOR:
GRAY GREEN
INTAKE
AB
AKX00618AB
MD998774
AKX00718
SPRING SEAT
SPRING
RETAINER
IDENTIFI-
CATION
COLOR
STEM SEAL
AB
CYLINDER HEAD AND VALVES
TSB Revision
ENGINE OVERHAUL
11B-30
>>C<< RETAINER LOCK INSTALLATION
Using special tool MD998735 or MD998772, compress the
valve spring and insert the retainer lock into position.
NOTE: The valve spring, if excessively compressed, causes
the bottom end of retainer to damage the stem seal.
.
>>D<< CYLINDER HEAD BOLT INSTALLATION
CAUTION
Attach the head bolt washer in the direction shown in the
figure.
1. Tighten the bolts in two or three rounds stages in the
illustrated sequence.
Tightening torque: 108
± 5 N⋅m (80 ± 4 ft-lb)
2. Back off the bolts once and tighten them again to the
specified torque in step 1.
AK100166
MD998735
AB
AKX00617
MD998772
AB
AKX01452AB
FRONT
MD998051
HEAD
BOLT
WASHER
RIGHT
BANK
LEFT
BANK
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