Mitsubishi L200. Manual - part 23

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-20

CAMSHAFT AND VALVE STEM SEAL

REMOVAL AND INSTALLATION

M1112006602262

CAUTION

* Remove and assemble the marked parts in each cylinder unit.

Pre-removal and Post-installation Operation
• Inlet Manifold Removal and Installation (Refer to GROUP 

15 

− Inlet Manifold 

P.15-15

).

AC501908AD

2

1

18 ± 2 N·m

3

N

4

5

6

N

7

9

7

10

11

12

13

13

14

15

16

17

N

18

18

19

20

21

22

23

24

25*

25*

26*

28

27*

29*

N

26*

27*

29*

28

N

24

20

21

22
23

88 ± 10 N·m

10 ± 2 N·m

20 ± 1 N·m

18 ± 2 N·m

20 ± 1 N·m

11 ± 1 N·m

11 ± 1 N·m

8

Apply engine oil to all 
moving parts before
installation.

Inlet camshaft removal steps 

•

Timing belt (Refer to 

P.11A-43

).

•

Rocker cover (Refer to GROUP 
13A 

− Fuel Injector 

P.13A-598

).

•

Valve clearance check and 
adjustment (Refer to 

P.11A-12

).

<<

A

>>

>>

K

<<

1.

Camshaft sprocket

2.

Timing belt rear cover

>>

J

<<

3.

Camshaft oil seal

<<

B

>>

>>

I

<<

4.

Front left camshaft bearing cap

>>

I

<<

5.

Inlet oil pipe assembly

>>

I

<<

6.

O-ring

<<

B

>>

>>

I

<<

7.

Left camshaft bearing cap

>>

H

<<

8.

Inlet camshaft assembly

>>

G

<<

9.

Snap ring

>>

G

<<

10. Wave washer

>>

G

<<

11. Sub gear

>>

G

<<

12. C-spring

>>

G

<<

13. Dowel pin

>>

G

<<

14. Inlet camshaft

Inlet camshaft removal steps 

Exhaust camshaft removal 
steps 

•

Rocker cover (Refer to GROUP 
13A 

− Fuel Injector 

P.13A-598

).

•

Valve clearance check and 
adjustment (Refer to 

P.11A-12

).

<<

B

>>

>>

F

<<

15. Front right camshaft bearing cap

>>

F

<<

16. Exhaust oil pipe assembly

>>

F

<<

17. O-ring

<<

B

>>

>>

F

<<

18. Right camshaft bearing cap

>>

E

<<

19. Exhaust camshaft assembly

Valve stem seal removal steps 

•

Timing belt (Refer to 

P.11A-43

).

•

Rocker cover (Refer to GROUP 
13A 

− Fuel Injector 

P.13A-598

).

•

Valve clearance check and 
adjustment (Refer to 

P.11A-12

).

<<

A

>>

>>

K

<<

1.

Camshaft sprocket

2.

Timing belt rear cover

>>

J

<<

3.

Camshaft oil seal

<<

B

>>

>>

I

<<

4.

Front left camshaft bearing cap

>>

I

<<

5.

Inlet oil pipe assembly

>>

I

<<

6.

O-ring

<<

B

>>

>>

I

<<

7.

Left camshaft bearing cap

>>

H

<<

8.

Inlet camshaft assembly

<<

B

>>

>>

F

<<

15. Front right camshaft bearing cap

>>

F

<<

16. Exhaust oil pipe assembly

>>

F

<<

17. O-ring

<<

B

>>

>>

F

<<

18. Right camshaft bearing cap

>>

E

<<

19. Exhaust camshaft assembly

>>

D

<<

20. Rocker arm assembly

>>

D

<<

21. Nut

>>

D

<<

22. Adjusting screw
23. Pivot bolt

>>

C

<<

24. Stem end cap

<<

C

>>

>>

B

<<

25. Valve spring retainer lock
26. Valve spring retainer
27. Valve spring

>>

A

<<

28. Valve stem seal
29. Valve spring seat

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-21

REMOVAL SERVICE POINTS

<<A>> CAMSHAFT SPROCKET REMOVAL

AC507554

MD998719

MB990767

AB

1. Use the following special tools to hold the 

camshaft sprocket.

• Front hub and flange yoke holder (MB990767)

• Pin (MD998719)

2. Loosen the camshaft sprocket mounting bolt and 

remove the camshaft sprocket.

<<B>> FRONT LEFT CAMSHAFT BEARING CAP/
LEFT CAMSHAFT BEARING CAP/FRONT RIGHT 
CAMSHAFT BEARING CAP/RIGHT CAMSHAFT 
BEARING CAP REMOVAL

AC501909AB

1

1

2

2

3

3

4

4

5

5

6

6

9

9

8

10

Engine front

Front right camshaft
bearing cap

Right camshaft bearing cap

Left camshaft bearing cap

7

7

10

8

Front left camshaft
bearing cap

Loosen the mounting bolts of the front camshaft 
bearing cap and camshaft bearing cap in the order 
shown in the figure. Then, remove the front camshaft 
bearing cap and camshaft bearing caps.

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-22

<<C>> VALVE SPRING RETAINER LOCK 
REMOVAL

CAUTION

When removing valve spring retainer lock, leave 
the piston of each cylinder in the TDC (Top Dead 
Centre) position. The valve may fall into the cylin-
der if the piston is not properly in the TDC posi-
tion.

AC501910

AB

MD998772

Use special tool valve spring compressor 
(MD998772) to compress the valve spring and then 
remove the valve spring retainer lock.

INSTALLATION SERVICE POINTS

>>A<< VALVE STEM SEAL INSTALLATION
1. Apply a small amount of engine oil to the valve 

stem seal.

CAUTION

• Do not re-use the valve stem seal.
•

AC308654AC

MB991999

Valve

Valve guide

Valve stem 
seal

Special tool valve stem seal installer 
(MB991999) must be used to install the valve 
stem seal. Improper installation could result 
in oil leaking past the valve guide.

2. Use the special tool valve stem seal installer 

(MB991999) to fill a new valve stem seal in the 
valve guide using the valve stem area as a guide.

>>B<< VALVE SPRING RETAINER LOCK 
INSTALLATION

AC501910

AB

MD998772

Use special tool valve spring compressor 
(MD998772) to compress the valve spring and then 
install the valve spring retainer lock in the same man-
ner as removal.

>>C<< STEM END CAP INSTALLATION

AC501911AB

Stem end cap

Inlet valve or
exhaust valve

Install the stem end cap. Make sure that the stem 
end cap is in close contact with the stem end faces of 
the inlet and exhaust valve.

>>D<< ADJUSTING SCREW/NUT/ROCKER ARM 
ASSEMBLY INSTALLATION

AC501912AB

Rocker arm
assembly

Nut

Adjusting screw

5.5 – 6.5 mm

1. Screw the adjusting screw into the rocker arm 

assembly, and then temporarily assemble using a 
nut so that the adjusting screw protrusion 
becomes the dimension shown in the figure.

2. Apply the engine oil to the sliding surface of the 

parts below.

CAMSHAFT AND VALVE STEM SEAL

ENGINE MECHANICAL

11A-23

• Roller and valve-side sliding area of the rocker 

arm assembly

• Concave spherical surface of pivot bolt or spheri-

cal surface of adjusting screw

AC501913 AB

Rocker arm assembly

Stem end cap

Pivot
bolt

3. Place the rocker arm assembly onto the pivot bolt 

and the stem end cap as shown in the figure.

>>E<< EXHAUST CAMSHAFT ASSEMBLY 
INSTALLATION
1. Apply the engine oil to the cam face, journal 

section, thrust face, and gear teeth face of 
exhaust camshaft.

AC501914AB

Exhaust camshaft

Timing mark

2. Set the timing mark of the exhaust camshaft in the 

position shown in the figure.

>>F<< RIGHT CAMSHAFT BEARING CAP/O-
RING/EXHAUST OIL PIPE ASSEMBLY/FRONT 
RIGHT CAMSHAFT BEARING CAP 
INSTALLATION
1. Place the right camshaft bearing cap onto the 

camshaft journal section.

2. Apply the engine oil to the O-ring section of 

exhaust oil pipe assembly, and insert the tip of 
exhaust oil pipe assembly into the cylinder head. 
Then, place the pipe section onto the right 
camshaft bearing cap.

AC501915AB

10

9

8

7

6

5

2

3

Engine front

Front right camshaft
bearing cap

Right camshaft bearing cap

4

1

3. Tighten the mounting bolts of the right camshaft 

bearing cap and front right camshaft bearing cap 
to the specified torque in the order shown in the 
figure. Then, fix the right camshaft bearing cap, 
exhaust oil pipe assembly, and front right 
camshaft bearing cap to the cylinder head.

Tightening torque:

11 

± 1 N⋅m (Right camshaft bearing cap mount-

ing bolts)

20 

± 1 N⋅m (Front right camshaft bearing cap 

mounting bolts)

>>G<< INLET CAMSHAFT/DOWEL PIN/C-
SPRING/SUB GEAR/WAVE WASHER/SNAP RING 
INSTALLATION

AC501916AB

Inlet camshaft

1. Fix the inlet camshaft hexagonal area using a vice 

or other devices.