Mitsubishi Galant (2004+). Manual - part 1658

SPECIAL TOOLS

TSB Revision

INTAKE AND EXHAUST

15-3

INSPECTION PROCEDURE 2: Abnormal Noise 

DIAGNOSIS

STEP 1. Start the engine. Have an assistant stay 
in the drivers seat. Raise the vehicle on a hoist. 
Have the assistant rev the engine while 
searching for exhaust leaks.

Q: Is any abnormal noise generated?

YES : 

Go to Step 2.

NO : 

The procedure is complete.

STEP 2. Check for missing parts in the muffler. 
Tap the muffler lightly to check for loose baffles, 
etc.

Q: Are there any missing parts in the muffler? 

YES : 

Replace, then go to Step 1.

NO : 

Go to Step 3.

STEP 3. Check the hanger for cracks.

Q: Is the hanger cracked?

YES : 

Replace, then go to Step 1.

NO : 

Go to Step 4.

STEP 4. Check for interference of the pipes and 
muffler with the body.

Q: Are the pipes and muffler interfering with the 

body?

YES : 

Repair, then go to Step 1.

NO : 

Go to Step 5.

STEP 5. Check the heat protectors.

Q: Are any heat protectors loose or damaged?

YES : 

Tighten or replace, then go to Step 1.

NO : 

Go to Step 6.

STEP 6. Check the pipes and muffler for damage.

Q: Are the pipes and muffler damaged?

YES : 

Replace, then go to Step 1.

NO : 

There is no action to be taken.

SPECIAL TOOLS

M1151000600429

TOOL

TOOL NUMBER AND 
NAME

SUPERSESSION

APPLICATION

MD998412
Guide

MD998412

Installation of intake 
manifold plenum

MB991953 
Oxygen sensor wrench

-

Removal and installation 
of heated oxygen sensor

MD998770 
Oxygen sensor wrench

MD998770-01 or General 
service tool

Removal and installation 
of heated oxygen sensor

B991953

AIR CLEANER

TSB Revision

INTAKE AND EXHAUST

15-4

AIR CLEANER

REMOVAL AND INSTALLATION

M1151002100516

<2.4L ENGINE>

AC306972 

1

3

4

5

6

2

9

7

8

11

10

3.0 ± 0.5 N·m
27 ± 4 in-lb

3.0 ± 0.5 N·m
27 ± 4 in-lb

4.0 ± 0.9 N·m
35 ± 8 in-lb

4.0 ± 0.9 N·m
35 ± 8 in-lb

1.8 ± 0.6 N·m
16 ± 5 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

12 ± 2 N·m
102 ± 22 in-lb

AB

REMOVAL STEPS

1.

AIR DUCT

2.

MASS AIRFLOW SENSOR 
CONNECTOR

3.

MASS AIRFLOW SENSOR

4.

AIR CLEANER COVER

5.

AIR CLEANER ELEMENT

6.

AIR CLEANER RESONATOR

7.

BREATHER HOSE CONNECTION

8.

AIR INTAKE HOSE

•

POWERTRAIN CONTROL 
MODULE (PCM) (REFER TO 
GROUP 13A, POWERTRAIN 
CONTROL MODULE (PCM) 

P.13A-1121

.)

9.

AIR CLEANER BODY

10. AIR CLEANER BRACKET
•

UNDER COVER (LH)

11. AIR CLEANER RESONATOR

REMOVAL STEPS (Continued)

AIR CLEANER

TSB Revision

INTAKE AND EXHAUST

15-5

<3.8L ENGINE>

AC306973

1

3

4

2

8

6

7

10

9

4.0 ± 0.9 N·m
35 ± 8 in-lb

4.0 ± 0.9 N·m
35 ± 8 in-lb

1.8 ± 0.6 N·m
16 ± 5 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

8.8 ± 1.0 N·m
78 ± 9 in-lb

12 ± 2 N·m
102 ± 22 in-lb

AB

5

REMOVAL STEPS

1.

AIR DUCT

2.

MASS AIRFLOW SENSOR 
CONNECTOR

3.

MASS AIRFLOW SENSOR

4.

AIR CLEANER COVER

5.

AIR CLEANER ELEMENT

6.

BREATHER HOSE CONNECTION

7.

AIR INTAKE HOSE

•

POWERTRAIN CONTROL 
MODULE (PCM) (REFER TO 
GROUP 13A, POWERTRAIN 
CONTROL MODULE (PCM) 

P.13B-1146

.)

8.

AIR CLEANER BODY

9.

AIR CLEANER BRACKET

•

UNDER COVER (LH)

10. AIR CLEANER RESONATOR

REMOVAL STEPS (Continued)

INTAKE MANIFOLD PLENUM

TSB Revision

INTAKE AND EXHAUST

15-6

INTAKE MANIFOLD PLENUM

REMOVAL AND INSTALLATION

M1151002700198

Pre-removal Operation
• Engine Coolant Draining (Refer to GROUP 14, On-vehicle 

Service 

P.14-7

.)

• Strut Tower Bar Removal (Refer to GROUP 42, Strut 

Tower Bar 

P.42-12

.)

• Air Cleaner Cover and Air Intake Hose Removal (Refer to 

P.15-4

.)

• Throttle Body Removal (Refer to GROUP 13B, Throttle 

Body 

P.13B-1145

.)

Post-installation Operation
• Throttle Body Installation (Refer to GROUP 13B, Throttle 

Body 

P.13B-1145

.)

• Air Cleaner Cover and Air Intake Hose Installation (Refer 

to 

P.15-4

.)

• Strut Tower Bar Installation (Refer to GROUP 42, Strut 

Tower Bar 

P.42-12

.)

• Engine Coolant Supplying (Refer to GROUP 14, On-vehi-

cle Service 

P.14-7

.)

AC306907

9.0 ± 1.0 N·m
80 ± 9 in-lb

5.0 ± 1.0 N·m
44 ± 9 in-lb

11 ± 1 N·m
98 ± 8 in-lb

11 ± 1 N·m
98 ± 8 in-lb

11 ± 1 N·m
98 ± 8 in-lb

11 ± 1 N·m
98 ± 8 in-lb

12 ± 2 N·m
102 ± 22 in-lb

12 ± 2 N·m
102 ± 22 in-lb

19 ± 3 N·m
14 ± 2 ft-lb

18 ± 2 N·m
13 ± 2 ft-lb

59 ± 10 N·m
44 ± 7 ft-lb

41 ± 8 N·m
30 ± 6 ft-lb

36 ± 6 N·m
27 ± 4 ft-lb

36 ± 6 N·m
27 ± 4 ft-lb

18 ± 2 N·m
13 ± 2 ft-lb

18 ± 2 N·m
13 ± 2 ft-lb

18 ± 2 N·m
13 ± 2 ft-lb

24 ± 3 N·m
18 ± 2 ft-lb

9.0 ± 1.0 N·m
80 ± 9 in-lb

36 ± 6 N·m
27 ± 4 ft-lb

1

2

3

4

5

6

7

8

9

10

11

12

13

14

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16

17

18

19

20

21

22

23

23

23

23

24

25

N

N

N

N

AB

19 ± 3 N·m
14 ± 2 ft-lb