Mitsubishi Galant. Manual — part 338

GENERAL INFORMATION

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INTAKE AND EXHAUST

15-2

.

G EN ER A L IN FO R M ATIO N

M1151000100101

The exhaust pipe is diveided into five <3.0L Engine>
or four <2.4L Engine> parts.

IN TA K E A N D EXH A U ST D IA G N O SIS

INTRODUCTION

M1151006900075

The occurrence of exhaust leakage or abnormal
noise is caused by cracks or strain in the gasket, or
by when the exhaust pipe or muffler is damaged due
to impacts during travel. The exhaust leaks from
these sections and causes the exhaust noise to
increase. There may be cases when there is
interference with the body and vibration noise is
generated.

TROUBLESHOOTING STRATEGY

M1151007000075

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find an
intake or exhaust fault.
1. Gather information from the customer.

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the SYMPTOM

CHART.

4. Verify malfunction is eliminated.

SYMPTOM CHART

M1151007100072

SYMPTOM PROCEDURES

Inspection Procedure 1

M1151007300032

Exhaust leakage

DIAGNOSIS

STEP 1. Check the gasket for cracks damage.

Q: Is the gasket damaged?

YES :

Replace the gasket, then go Step 3.

NO :

Go to Step 2.

STEP 2. Check for loosening in each coupling
section.

Q: Is there any loosening in each section?

YES :

Tighten, then go to Step 3.

NO :

There is no action to be taken.

STEP 3. Check symptom.

Q: Is the exhaust leaking?

YES :

Return to Step 1.

NO :

This diagnosis is complete.

SYMPTOMS

INSPECTION PROCEDURE

REFERENCE PAGE

Exhaust leakage

1

P.15-2

Abnormal noise generation

2

P.15-3

SPECIAL TOOL

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INTAKE AND EXHAUST

15-3

Inspection Procedure 2

M1151007400028

Abnormal noise

DIAGNOSIS

STEP 1. 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 6.

NO :

Go to Step 2.

STEP 2. Check the hanger for cracks.

Q: Is the hanger cracked?

YES :

Replace, then go to Step 6.

NO :

Go to Step 3.

STEP 3. 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 6.

NO :

Go to Step 4.

STEP 4. Check the heat protectors.

Q: Are any heat protectors loose or damaged?

YES :

Tighten or replace, then go to Step 6.

NO :

Go to Step 5.

STEP 5. Check the pipes, catalytic converters
and muffler for damage.

Q: Are the pipes, catalytic converters and muffler

damaged?
YES :

Replace, then go to Step 6.

(For the removal of the catalytic converter,
refer to GROUP 17

P.17-98

.)

NO :

There is no action to be taken.

STEP 6. Check symptom.

Q: Is any abnormal noise generated?

YES :

Return to Step 1.

NO :

This diagnosis is complete.

SPEC IA L TO O L

M1151000600076

O N -VEH IC LE SERVIC E

INTAKE MANIFOLD VACUUM CHECK

M1151001800051

<2.4L ENGINE>

Refer to GROUP 11A, On-vehicle Service

P.11A-9

.

<3.0L ENGINE>

Refer to GROUP 11C, On-vehicle Service

P.11C-8

.

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION

APPLICATION

MD998770
Oxygen sensor wrench

MD998770-01 or general
service tool

Heated oxygen sensor
removal and installation

MD998770

AIR CLEANER

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INTAKE AND EXHAUST

15-4

A IR C LE A N ER

AIR CLEANER REMOVAL AND INSTALLATION

M1151002100088

Pre-removal and Post-installation Operation
Battery Removal and Installation (Refer to GROUP 54A, Bat-
tery

P.54A-8

.)

AC001421

<2.4L ENGINE>

<3.0L ENGINE>

5

4

3.9 N·m
35 in-lb

3.9 N·m
35 in-lb

1

2

8.8 N·m
78 in-lb

8.8 N·m
78 in-lb

6

8

7

3

9

4

1

3.9 N·m
35 in-lb

3.9 N·m
35 in-lb

8.8 N·m
78 in-lb

8.8 N·m
78 in-lb

2

3

10

7

8

5

6

AC

REMOVAL STEPS

1.

AIR INTAKE HOSE

2.

RESONATOR A

3.

AIR DUCT

4.

AIR FLOW SENSOR ASSEMBLY

5.

AIR CLEANER COVER

6.

AIR CLEANER ELEMENT

7.

AIR CLEANER BODY

8.

AIR CLEANER BRACKET

9.

RESONATOR B <2.4L ENGINE>

10. RESONATOR C <3.0L ENGINE>

REMOVAL STEPS (Continued)

INTAKE MANIFOLD PLENUM

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INTAKE AND EXHAUST

15-5

IN TA K E M A N IFO LD PLEN U M

REMOVAL AND INSTALLATION

M1151002700057

Pre-removal Operation

•

Fuel Discharge Prevention [Refer to GROUP 13B, On-
vehicle Service

P.13B-523

.]

•

Engine Coolant Draining [Refer to GROUP 00,
Maintenance Service

−

Engine Coolant (Change)

P.00-

50

.]

•

Air Cleaner Removal (Refer to

P.15-4

.)

•

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

P.13B-528

.)

Post-installation Operation

•

Throttle Body Installation (Refer to GROUP 13B, Throttle
Body

P.13B-528

.)

•

Air Cleaner Installation (Refer to

P.15-4

.)

•

Engine Coolant Supplying [Refer to GROUP 00,
Maintenance Service

−

Engine Coolant (Change)

P.00-

50

.]

AC004233

9.8 – 12 N·m
87 – 106 in-lb

9.8 – 12 N·m
87 – 106 in-lb

15

12

12

11

14

10

13

14

4

3

8.8 N·m
78 in-lb

8.8 N·m
78 in-lb

5

6

6

7

9.8 – 12 N·m
87 – 106 in-lb

2

9

4.9 N·m
43 in-lb

AB

8.8 N·m
78 in-lb

1

REMOVAL STEPS

1. ACCELERATOR CABLE

CONNECTION

2. MANIFOLD DIFFERENTIAL

PRESSURE SENSOR CONNECTOR

3. CONTROL WIRING HARNESS AND

POWER STEERING WIRING
HARNESS COMBINATION
CONNECTOR

4. EGR SOLENOID VALVE

CONNECTOR

5. EVAPORATIVE EMISSION PURGE

SOLENOID VALVE CONNECTOR

6. KNOCK SENSOR CONNECTOR
7. CRANKSHAFT POSITION SENSOR

CONNECTOR

8. RIGHT BANK HEATED OXYGEN

SENSOR CONNECTOR

9. INJECTOR CONNECTOR
10. DISTRIBUTOR CONNECTOR
11. CONTROL WIRING HARNESS AND

INJECTOR WIRING HARNESS
COMBINATION CONNECTOR

12. VACUUM HOSE CONNECTION
13. VACUUM PIPE
14. EGR SOLENOID VALVE,

EVAPORATIVE EMISSION PURGE
SOLENOID VALVE AND VACUUM
CONTROL VALVE

15. BRAKE BOOSTER VACUUM HOSE

CONNECTION

REMOVAL STEPS (Continued)