Mitsubishi Galant (2004+). Manual - part 155

CAMSHAFT AND VALVE STEM SEAL

TSB Revision

ENGINE MECHANICAL <3.8L ENGINE>

11C-27

Required Special Tools:

• MB990767: End Yoke Holder

• MD998443: Auto-lash Adjuster Holder

• MB991559: Camshaft Oil Seal Adapter Installer

• MD998713: Camshaft Oil Seal Installer

• MD998715: Crankshaft Pulley Holder Pin

• MD998772: Valve Spring Compressor

• MD998774: Valve Stem Seal Installer

13. CAMSHAFT POSITION SENSOR 

SUPPORT

14. CAMSHAFT POSITION SENSING 

CYLINDER

<<B>>

>>F<<

15. CAMSHAFT SPROCKET
16. CAMSHAFT

<<C>>

>>E<<

17. CAMSHAFT OIL SEAL

VALVE STEM SEAL REMOVAL 
STEPS

•

ENGINE COVER (REFER TO 

P.11C-15

.)

1.

PCV HOSE CONNECTION

2.

PCV VALVE

3.

IGNITION COIL CONNECTOR

4.

IGNITION COIL

5.

ENGINE CONTROL WIRING 
HARNESS CLAMP

6.

ROCKER COVER

7.

ROCKER COVER GASKET

8.

SPARK PLUG GUIDE OIL SEAL

<<A>>

>>D<<

9.

ROCKER ARM, SHAFT AND 
LASH ADJUSTER ASSEMBLY 
(INTAKE SIDE)

<<A>>

>>D<<

10. ROCKER ARM, SHAFT AND 

LASH ADJUSTER ASSEMBLY 
(EXHAUST SIDE)

•

SPARK PLUG (REFER TO 
GROUP 16, IGNITION COIL 

P.16-41

.)

<<D>>

>>C<<

18. VALVE SPRING RETAINER LOCK
19. VALVE SPRING RETAINER

>>B<<

20. VALVE SPRING

>>A<<

21. VALVE STEM SEAL
22. VALVE SPRING SEAT

CAMSHAFT REMOVAL STEPS 

CAMSHAFT AND VALVE STEM SEAL

TSB Revision

ENGINE MECHANICAL <3.8L ENGINE>

11C-28

<RIGHT BANK>

AC307923AB

ENGINE OIL

CAM SECTION AND
JOURNAL SECTION

CYLINDER HEAD

13

11

12

15*

16*

17*

18*

N

7

N

1

2

3

4

5

6

N

8

9

10

11

12

N

13

14

N

15*

16*

17*

18*

N

31 ± 3 N·m
23 ± 2 ft-lb

10 ± 2 N·m
89 ± 17 in-lb

3.5 ± 0.5 N·m
31 ± 4 in-lb

19 ± 3 N·m
14 ± 2 ft-lb

88 ± 10 N·m
65 ± 7 ft-lb

19*

19*

CAMSHAFT REMOVAL STEPS

•

INTAKE MANIFOLD PLENUM 
(REFER TO GROUP 15, INTAKE 
MANIFOLD PLENUM 

P.15-6

.)

•

TIMING BELT (REFER TO 

P.11C-48

.)

•

BATTERY AND BATTERY TRAY

•

HEATER HOSE AND WATER 
HOSE (REFER TO GROUP 14, 
WATER HOSE AND WATER PIPE 

P.14-24

.)

•

THROTTLE BODY STAY (REFER 
TO GROUP 13B, THROTTLE 
BODY ASSEMBLY 

P.13B-1145

.)

1.

BREATHER HOSE CONNECTION

2.

BLOW-BY HOSE CONNECTION

3.

IGNITION COIL CONNECTOR

4.

IGNITION COIL

5.

ROCKER COVER

6.

ROCKER COVER GASKET

7.

SPARK PLUG GUIDE OIL SEAL

<<A>>

>>D<<

8.

ROCKER ARM, SHAFT AND 
LASH ADJUSTER ASSEMBLY 
(INTAKE SIDE)

<<A>>

>>D<<

9.

ROCKER ARM, SHAFT AND 
LASH ADJUSTER ASSEMBLY 
(EXHAUST SIDE)

<<B>>

>>F<<

10. CAMSHAFT SPROCKET
11. THRUST CASE
12. O-RING
13. CAMSHAFT

<<C>>

>>E<<

14. CAMSHAFT OIL SEAL

CAMSHAFT REMOVAL STEPS 

CAMSHAFT AND VALVE STEM SEAL

TSB Revision

ENGINE MECHANICAL <3.8L ENGINE>

11C-29

Required Special Tools:

• MB990767: End Yoke Holder

• MD998443: Auto-lash Adjuster Holder

• MB991559: Camshaft Oil Seal Adapter Installer

• MD998713: Camshaft Oil Seal Installer

• MD998715: Crankshaft Pulley Holder Pin

• MD998772: Valve Spring Compressor

• MD998774: Valve Stem Seal Installer

VALVE STEM SEAL REMOVAL 
STEPS

•

INTAKE MANIFOLD PLENUM 
(REFER TO GROUP 15, INTAKE 
MANIFOLD PLENUM 

P.15-6

.)

•

TIMING BELT FRONT UPPER 
COVER, RIGHT (REFER TO 

P.11C-48

.)

1.

BREATHER HOSE CONNECTION

2.

BLOW-BY HOSE CONNECTION

3.

IGNITION COIL CONNECTOR

4.

IGNITION COIL

5.

ROCKER COVER

6.

ROCKER COVER GASKET

7.

SPARK PLUG GUIDE OIL SEAL

<<A>>

>>D<<

8.

ROCKER ARM, SHAFT AND 
LASH ADJUSTER ASSEMBLY 
(INTAKE SIDE)

<<A>>

>>D<<

9.

ROCKER ARM, SHAFT AND 
LASH ADJUSTER ASSEMBLY 
(EXHAUST SIDE)

•

SPARK PLUG (REFER TO 
GROUP 16, IGNITION COIL 

P.16-41

.)

<<D>>

>>C<<

15. VALVE SPRING RETAINER LOCK
16. VALVE SPRING RETAINER

>>B<<

17. VALVE SPRING

>>A<<

18. VALVE STEM SEAL
19. VALVE SPRING SEAT

CAMSHAFT AND VALVE STEM SEAL

TSB Revision

ENGINE MECHANICAL <3.8L ENGINE>

11C-30

REMOVAL SERVICE POINTS

.

<<A>> ROCKER ARM AND SHAFT ASSEMBLY REMOVAL
1. Install special tool MD998443 as shown in the illustration so 

that the lash adjusters will not fall out.

CAUTION

Never disassemble the rocker arm and shaft assembly.
2. Loosen the rocker arm and shaft assembly mounting bolt, 

and then remove the rocker arm and shaft assembly with the 
bolt still attached.

.

<<B>> CAMSHAFT SPROCKET REMOVAL
Use special tools MD998715 and MB990767 to remove the 
camshaft sprocket.

.

<<C>> CAMSHAFT OIL SEAL REMOVAL
1. Make a notch in the oil seal lip section with a knife, etc.

CAUTION

Be careful not to damage the camshaft and the cylinder 
head.
2. Cover the end of a flat-tipped screwdriver with a shop towel 

and insert into the notched section of the oil seal, and pry 
out the oil seal to remove it.

.

AC205280

MD998443

AB

ACX00301AB

MB990767

MD998715

ACX00373AB

FLAT-TIPPED
SCREWDRIVER

CAMSHAFT

OIL SEAL

LIP 
SECTION