Mitsubishi Galant (2004+). Manual - part 1661

EXHAUST MANIFOLD

TSB Revision

INTAKE AND EXHAUST

15-15

EXHAUST MANIFOLD

REMOVAL AND INSTALLATION <2.4L ENGINE>

M1151003300676

Required Special Tool:

• MB991953: Oxygen sensor wrench

AC306678

1

6

5

4

3

2

AB

1

N

14 ± 1 N·m
120 ± 13 in-lb

14 ± 1 N·m
120 ± 13 in-lb

14 ± 1 N·m
120 ± 13 in-lb

44 ± 5 N·m
33 ± 3 ft-lb  

44 ± 5 N·m
33 ± 3 ft-lb  

49 ± 5 N·m
36 ± 4 ft-lb  

44 ± 5 N·m
33 ± 3 ft-lb  

35 ± 6 N·m
26 ± 4 ft-lb  

REMOVAL STEPS

<<A>> >>A<<

1. HEATED OXYGEN SENSOR
2. EXHAUST MANIFOLD COVER
•

FRONT NO.1 EXHAUST PIPE 
(REFER TO 

P.15-21

).

3. EXHAUST MANIFOLD BRACKET B

4. EXHAUST MANIFOLD
5. EXHAUST MANIFOLD GASKET
6. EXHAUST MANIFOLD BRACKET A

REMOVAL STEPS (Continued)

EXHAUST MANIFOLD

TSB Revision

INTAKE AND EXHAUST

15-16

REMOVAL SERVICE POINT

.

<<A>> HEATED OXYGEN SENSOR REMOVAL
Use special tool MB991953 to remove the heated oxygen sen-
sor.

INSTALLATION SERVICE POINT

.

>>A<< HEATED OXYGEN SENSOR INSTALLATION
Use special tool MB991953 to install the heated oxygen sensor.

AC301966

AC

HEATED OXYGEN 
SENSOR

MB991953

AC301966

AC

HEATED OXYGEN 
SENSOR

MB991953

EXHAUST MANIFOLD

TSB Revision

INTAKE AND EXHAUST

15-17

REMOVAL AND INSTALLATION <3.8L ENGINE>

M1151003300665

<LEFT BANK>

Pre-removal and Post-installation Operation
• Under Cover Removal and Installation (Refer to GROUP 

51, Under Cover 

P.51-11

.) 

• Air Duct Removal and Installation (Refer to 

P.15-4

.)

AC306910

19 ± 3 N·m
14 ± 2 ft-lb

44 ± 8 N·m
33 ± 5 ft-lb

44 ± 8 N·m
33 ± 5 ft-lb

44 ± 5 N·m
33 ± 3 ft-lb

49 ± 9 N·m
37 ± 6 ft-lb

14 ± 1 N·m
120 ± 3 in-lb

1

1

2

3

4

5

6

7

8

9

10

N

N

AB

44 ± 5 N·m
33 ± 3 ft-lb

44 ± 5 N·m
33 ± 3 ft-lb

REMOVAL STEPS

1.

LEFT HEATED OXYGEN SENSOR 
CONNECTOR

<<A>>

>>A<<

2.

LEFT BANK HEATED OXYGEN 
SENSOR (FRONT)

<<B>>

>>B<<

3.

LEFT BANK HEATED OXYGEN 
SENSOR (REAR)

4.

HEAT PROTECTOR

5.

FRONT EXHAUST PIPE 
CONNECTING BOLTS

6.

FRONT EXHAUST PIPE GASKET

7.

EXHAUST MANIFOLD STAY, LEFT 
B

8.

EXHAUST MANIFOLD

9.

EXHAUST MANIFOLD GASKET

10. EXHAUST MANIFOLD STAY, LEFT 

A

REMOVAL STEPS (Continued)

EXHAUST MANIFOLD

TSB Revision

INTAKE AND EXHAUST

15-18

<RIGHT BANK>

Pre-removal and Post-installation Operation
• Air Cleaner Cover and Air Intake Duct Removal and 

Installation (Refer to 

P.15-4

.)

• Battery Removal and Installation

• Under Cover Removal and Installation (Refer to GROUP 

51, Under Cover 

P.51-11

.) 

• Front Exhaust Pipe, Center  Exhaust Pipe Removal and 

Installation (Refer to 

P.15-21

.)

• Strut Tower Bar Removal and Installation (Refer to 

GROUP 42, Strut Tower Bar 

P.42-12

.)

• Engine Coolant Draining and Refilling (Refer to GROUP 

14, On-vehicle Service 

− Engine Coolant Replacement 

P.14-7

.)

AC308063AB

44 ± 5 N·m
33 ± 3 ft-lb

1

N

2

3

4

5

6

7

8

9

10

11

12

19 ± 3 N·m
14 ± 2 ft-lb

14 ± 1 N·m
120 ± 13 in-lb

13

N

44 ± 5 N·m
33 ± 3 ft-lb

14 ± 1 N·m
120 ± 13 in-lb

44 ± 8 N·m
33 ± 5 ft-lb

19 ± 3 N·m
14 ± 2 ft-lb

59 ± 10 N·m
44 ± 7 ft-lb

REMOVAL STEPS

1.

CENTER UNDER FLOOR HEAT 
PROTECTOR

•

STEERING GEAR AND LINKAGE 
PROTECTOR (REFER TO 
GROUP 37, POWERSTEERING 
GEAR BOX AND LINKAGE 

P.37A-34

)

2.

FRONT UNDER FLOOR HEAT 
PROTECTOR

3.

EXHAUST MANIFOLD STAY, 
RIGHT B

4.

RIGHT BANK HEATED OXYGEN 
SENSOR (FRONT) CONNECTOR

5.

RIGHT BANK HEATED OXYGEN 
SENSOR (REAR) CONNECTOR

<<A>>

>>A<<

6.

RIGHT BANK HEATED OXYGEN 
SENSOR (FRONT)

<<A>>

>>A<<

7.

RIGHT BANK HEATED OXYGEN 
SENSOR (REAR)

8.

EGR PIPE

9.

EGR PIPE GASKET

10. UPPER HEAT PROTECTOR
11. LOWER HEAT PROTECTOR
12. EXHAUST MANIFOLD
13. EXHAUST MANIFOLD GASKET

REMOVAL STEPS (Continued)