Mitsubishi Galant (2004+). Manual - part 603

ROCKER ARMS AND CAMSHAFT

TSB Revision

ENGINE OVERHAUL <3.8L ENGINE>

11D-29

CAUTION

Do not use container C for cleaning. If cleaning is per-
formed in container C, foreign matter could enter the pres-
sure chamber when the chamber is filled with diesel fuel.
7. Place the lash adjuster in container C. Then, gently push 

down the internal steel ball using a wire [0.5 mm (0.020 
inch) in diameter] or special tool MD998442.

8. Stand the lash adjuster with its plunger at the top, then push 

the plunger downward firmly until it moves through its 
greatest possible stroke. Return the plunger slowly, then 
release the steel ball and allow the pressure chamber to fill 
with diesel fuel.

9. Remove the lash adjuster from the container, then stand the 

lash adjuster with its plunger at the top. Push the plunger 
firmly and check that it does not move. 
NOTE: If the lash adjuster contracts or moves, repeat steps 
7 through 9 again to fill it with diesel fuel completely. 
Replace the lash adjuster if it still contracts or moves after 
performing these steps.

10.Stand the lash adjuster upright to prevent diesel fuel from 

spilling out. Do not allow the lash adjuster to become 
contaminated by dirt or other foreign matter. Install the lash 
adjuster onto the engine as soon as possible.

AK202682

DIESEL FUEL

MD998442

AD

AK202683

DIESEL FUEL

MD998442

AD

AKX00627

CYLINDER HEAD AND VALVES

TSB Revision

ENGINE OVERHAUL <3.8L ENGINE>

11D-30

CYLINDER HEAD AND VALVES

REMOVAL AND INSTALLATION

M1113006900527

Required Special Tools:

• MD998051: Cylinder Head Bolt Wrench

• MD998735: Valve Spring Compressor

• MD998772: Valve Spring Compressor

• MD998774: Valve Stem Seal Installer

AK304296AB

4

12

21

5

6

7

13

14

17

9

11

16

19

10

18

22

20

8

15

108 ± 5 N·m
80 ± 4 ft-lb

    0 N·m
    0 in-lb

108 ± 5 N·m
80 ± 4 ft-lb

1

2

→

→

APPLY ENGINE OIL
TO ALL MOVING
PARTS BEFORE
INSTALLATION.

3

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 <3.8L ENGINE>

11D-31

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.
NOTE: Tag removed valves, springs and other components, 
noting their cylinder numbers and locations to facilitate reas-
sembly. Store these components safely.

AK302682AB

MD998051

AK100166

MD998735

AB

AKX00617

MD998772

AB

CYLINDER HEAD AND VALVES

TSB Revision

ENGINE OVERHAUL <3.8L ENGINE>

11D-32

INSTALLATION SERVICE POINTS

.

>>A<< VALVE STEM SEAL INSTALLATION
1. Install the valve spring seat.

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.

.

AK303630

EXHAUST

RUBBER COLOR:
GRAY

RUBBER COLOR:
GRAY GREEN

INTAKE

AB

AKX00618AB

MD998774

AKX00718

SPRING SEAT

SPRING 
RETAINER

IDENTIFI-
CATION 
COLOR

STEM SEAL

AB