Mitsubishi Pajero Pinin. Manual - part 21

ENGINE <4G9> – 

Cylinder Head Gasket

11A-10

CYLINDER HEAD GASKET

REMOVAL AND INSTALLATION

Pre-removal and Post-installation Operations



Removal and Installation of Engine Cover (Refer to P.11A-5.)



Fuel Overflow Prevention Operation <only for pre-removal>



Fuel Leak Check <only for post-installation>



Air Bleeding the High-pressure Fuel Line <only for post-installation> 
[Refer to GROUP 13A – Fuel Pump (High-pressure).]



Removal and Installation of Under Cover



Check and Adjustment of Drive Belt Tension <only for post-installation>



Draining and Filling of Engine Coolant



Removal and Installation of Timing Belt Rear Upper Cover (Refer to P.11A-6.)



Removal and Installation of Fuel Pump (High-pressure) (Refer to GROUP 13A.)



Removal and Installation of Exhaust Manifold



Removal and Installation of Water Pipe



Removal and Installation of EGR Valve and Support Assembly

ENGINE <4G9> – 

Cylinder Head Gasket

11A-11

74 Nm 

→

 0 Nm 

→

 20 Nm 

→

 +90



 

→

 +90



(when the engine is cold)

6

7

1

2

3

4

5

(Engine oil)

22 Nm

44 Nm

29 Nm

44 Nm

29 Nm

Removal steps



A

 

C



1. Connection of radiator upper hose
2. Connection of heater hose



B



3. Power steering oil pump
4. Power steering oil pump bracket



C

 

B



5. Cylinder head bolt
6. Cylinder head assembly



A



7. Cylinder head gasket

ENGINE <4G9> – 

Cylinder Head Gasket

11A-12

REMOVAL SERVICE POINTS



A



RADIATOR UPPER HOSE REMOVAL

Put mating marks on the radiator upper hose and the
hose clamp for removal.



B



 POWER STEERING OIL PUMP REMOVAL

Remove the power steering oil pump with the hose
attached from the bracket.

NOTE
Tie the removed power steering oil pump and the A/C
compressor with strings to set aside so that they will not
hinder the removal and installation of the engine
assembly.



C



 CYLINDER HEAD BOLT REMOVAL

1.

Set the dowel pin of the camshaft at the position shown
in the illustration.

2.

Use the special tool to loosen the bolt in the order of
the numbers shown in the illustration in two to three stages
for removal.

Dowel pin

Dowel pin

Intake side

Exhaust side

Approx. 30



Approx. 16



MB991653

Front of the engine

1

5

4

2

7

3

8

6

9

10

ENGINE <4G9> – 

Cylinder Head Gasket

11A-13

INSTALLATION SERVICE POINTS



A



CYLINDER HEAD GASKET INSTALLATION

1.

Remove gasket attached on the mounting surface of
the gasket.

Caution
Be careful not to let foreign objects get inside the
engine coolant and the oil line.

2.

Install so that the each hole of the cylinder head is
aligned with each hole of the cylinder head gasket.



B



CYLINDER HEAD BOLT INSTALLATION

1.

Check that the neck down length of the cylinder head
bolt is within the limit. If it is outside the limit value,
replace the bolt with a new one.

Limit (A): 96.4 mm

2.

Face the sagging side of the bored cylinder head bolt
washer towards the direction shown in the illustration
to install to the cylinder head bolt.

3.

Apply a little amount of engine oil to the cylinder
head bolt thread and the washer.

4.

Use the special tool to tighten the bolt according to the
following procedure (plasticity tightening).
(1) Tighten the bolt to 74 Nm in the order of the

numbers shown in the illustration.

(2) Loosen the bolt completely in the reverse order of

the numbers shown in the illustration.

(3) Tighten the bolt to 20 Nm in the order of the

numbers shown in the illustration.

(4) Put the paint mark on the head of the cylinder

head bolt and the cylinder to tighten to the 90



 in

the order of the numbers shown in the illustration.

(5) Tighten to the 90



 in the order of the numbers

shown in the illustration so that the paint marks
on the head of the cylinder head bolt and cylinder
head are aligned.

Caution
1.

If the tightening angle is less than 90



, the

bolt is not sufficiently tightened.

2.

If the tightening angle is beyond the limit,
remove the bolt and start from step 1
again.

Sagging side

A

(Engine oil)

MB991653

10

1

5

4

2

7

3

8

6

9

Front of the engine

Step (4)

Step (5)

90



Paint mark

90



Paint mark