2005 MITSUBISHI 380 Workshop Manual

GENERAL DESCRIPTION
INTAKE AND EXHAUST15-2
GENERAL DESCRIPTIONM1151000100446
The exhaust pipe is divided into four parts.
INTAKE AND EXHAUST DIAGNOSIS
INTRODUCTIONM1151006900321
Intake leaks usually create driveability issues that
are not obviously related to the intake system.
Exhaust leaks or abnormal noise is caused by
cracks, gaskets and fittings, or by exhaust pipe or
muffler damage due to impacts during travel. The
exhaust leaks from these sections and causes the
exhaust noise to increase. There may be cases
when the system contacts the body and vibration
noise is generated.
TROUBLESHOOTING STRATEGYM1151007000321
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 system 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 CHARTM1151007100328
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Exhaust Leakage
DIAGNOSIS
STEP 1. Start the engine. Have an assistant stay
in the driver’s seat. Raise the vehicle on a hoist.
Have the assistant rev the engine while
searching for exhaust leaks.
Q: Is the exhaust leaking?
YES :
Go to Step 2.
NO : The procedure is complete.
STEP 2. Check the gasket for cracks, damage.
Q: Is the gasket damaged?
YES :
Replace the gasket, then go Step 1.
NO : Go to Step 3.
STEP 3. Check for loose coupling sections.
Q: Are there any loose each sections?
YES :
Tighten, then go to Step 1.
NO : There is no action to be taken. SYMPTOM INSPECTION PROCEDURE REFERENCE PAGE
Exhaust Leakage 1
P.15-2
Abnormal Noise 2
P.15-3

SPECIAL TOOLS
INTAKE AND EXHAUST15-3
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 TOOLSM1151000600429
TOOL TOOL NUMBER AND
NAMESUPERSESSION APPLICATION
MD998412
GuideMD998412 Installation of intake
manifold plenum
MB991953
Oxygen sensor wrench- Removal and installation
of heated oxygen sensor
MD998770
Oxygen sensor wrenchMD998770-01 or General
service toolRemoval and installation
of heated oxygen sensor

AIR CLEANER
INTAKE AND EXHAUST15-4
AIR CLEANER
REMOVAL AND INSTALLATIONM1151002100516
REMOVAL STEPS
1. AIR DUCT
2. AIRFLOW SENSOR CONNECTOR
3. AIRFLOW SENSOR
4. AIR CLEANER COVER
5. AIR CLEANER ELEMENT
6. BREATHER HOSE CONNECTION7. AIR INTAKE HOSE
ENGINE CONTROL UNIT (ECU) ).
8. AIR CLEANER BODY
9. AIR CLEANER BRACKET
UNDER COVER (LH)
10. AIRFLOW SENSOR NUTREMOVAL STEPS (Continued)

INTAKE MANIFOLD PLENUM
INTAKE AND EXHAUST15-5
INTAKE MANIFOLD PLENUM
REMOVAL AND INSTALLATION M1151002700198
Pre-removal Operation
Engine Coolant Draining (Refer to GROUP 14, On-vehicle
Service P.14-27).
Strut Tower Bar Removal (Refer to GROUP 42, Strut
To w e r B a r 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 13A-674).Post-installation Operation
Throttle Body Installation (Refer to GROUP 13B, Throttle
Body 13A-674).
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.14-27).

INTAKE MANIFOLD PLENUM
INTAKE AND EXHAUST15-6
Required Special Tool:
MD998412: Guide
INSTALLATION SERVICE POINT
.
>>A<< INTAKE MANIFOLD PLENUM INSTALLA-
TION
Use special tool MD998412 to install the intake manifold ple-
num.
REMOVAL STEPS
1. MANIFOLD ABSOLUTE
PRESSURE SENSOR
CONNECTOR
2. CONTROL WIRING HARNESS
AND INJECTOR WIRING
HARNESS COMBINATION
CONNECTOR
3. CRANKSHAFT POSITION
SENSOR CONNECTOR
4. KNOCK SENSOR CONNECTOR
5. POWER STEERING PRESSURE
SWITCH CONNECTOR
6. EVAPORATIVE EMISSION
PURGE SOLENOID CONNECTOR
8. VACUUM HOSE CONNECTION
9. PURGE HOSE
10. POWER STEERING PRESSURE
HOSE CLAMP
11. POWER STEERING PRESSURE
HOSE CLAMP BRACKET
12. INTAKE MANIFOLD PLENUM
STAY, REARSTEERING GEAR AND LINKAGE
PROTECTOR (REFER TO 37,
STEERING GEAR BOX AND
LINKAGE P.37-30)
POWER STEERING OIL PUMP
(REFER TO 37, POWER
STEERING OIL PUMP ASSEMBLY
P.37-43)
15. POWER STEERING OIL PUMP
BRACKET CONNECTING BOLT
16. INTAKE MANIFOLD PLENUM
STAY, FRONT
>>A<<17. INTAKE MANIFOLD PLENUM
18. INTAKE MANIFOLD PLENUM
GASKET
19. VACUUM PIPE
20. EVAPORATIVE EMISSION
PURGE SOLENOID ASSEMBLY
23. HARNESS BRACKET
24. MANIFOLD ABSOLUTE
PRESSURE SENSOR
25. O-RINGREMOVAL STEPS (Continued)

INTAKE MANIFOLD
INTAKE AND EXHAUST15-7
INTAKE MANIFOLD
REMOVAL AND INSTALLATION M1151003000802
Pre-removal Operation
Fuel Discharge Prevention [Refer to GROUP 13B,
On-vehicle Service
Fuel Pump Relay Disconnection
(How to Reduce Pressurized Fuel Lines) 13A-663.]
Intake Manifold Plenum Removal (Refer to P.15-5.)Post-installation Operation
Intake Manifold Plenum Installation (Refer to P.15-5.)
Fuel Leakage Inspection
REMOVAL STEPS
1. INJECTOR CONNECTOR
2. ENGINE MOUNTING STAY
>>C<<3. FUEL HIGH-PRESSURE HOSE
CONNECTION
5. BLOW-BY HOSE
<>6. FUEL RAIL AND INJECTOR
7. PCV HOSE CONNECTION8. TIMING BELT FRONT UPPER
COVER, RIGHT
9. TIMING BELT FRONT UPPER
COVER, LEFT
10. WATER PUMP BRACKET>>B<<11. INTAKE MANIFOLD
>>A<<12. INTAKE MANIFOLD GASKET
13. CONTROL HARNESS CLAMPREMOVAL STEPS (Continued)

INTAKE MANIFOLD
INTAKE AND EXHAUST15-8
REMOVAL SERVICE POINT
.
<> FUEL RAIL AND INJECTOR REMOVAL
Care must be taken when removing the fuel rail not to drop
the injector.
Remove the fuel rail with the injectors attached to it.
INSTALLATION SERVICE POINTS
.
>>A<< INTAKE MANIFOLD GASKET INSTALLA-
TION
Install the gasket with the protrusions in the position illustrated.
.
>>B<< INTAKE MANIFOLD INSTALLATION
1. Coat the intake manifold mounting studs with engine oil.
2. Tighten the intake manifold mounting nuts by the following
procedure.
.
ORDER MOUNTING NUTS TIGHTENING TORQUE
1st Right-bank nuts 6.5
1.5 Nm (58 13 in-lb)
2nd Left-bank nuts 22
1 Nm (16 1 ft-lb)
3rd Right-bank nuts 22
1 Nm (16 1 ft-lb)
4th Left-bank nuts 22
1 Nm (16 1 ft-lb)
5th Right-bank nuts 22
1 Nm (16 1 ft-lb)

INTAKE MANIFOLD
INTAKE AND EXHAUST15-9
>>C<< FUEL HIGH-PRESSURE HOSE
INSTALLATION
Be careful not to allow any engine oil to enter the fuel
rail.
Be careful not to bend the fuel high-pressure hose as it
is made of plastics.
1. When connecting the fuel high-pressure hose to the fuel rail,
apply a small amount of new engine oil to the O-ring and
then insert the fuel high-pressure hose, being careful not to
damage the O-ring.
2. While turning the fuel high-pressure hose to the left and
right, install it to the fuel rail.
3. Check that the injector turns smoothly. If it does not turn
smoothly, the O-ring may be trapped. Remove the fuel
high-pressure hose and then re-insert it into the fuel rail and
check again.
INSPECTIONM1151003100672
Check the following points; replace the part if a problem is
found.
.
Intake Manifold Check
1. Check for damage or cracking of any part.
2. Clogging of the negative pressure (vacuum) outlet port.
3. Using a straight edge and feeler gauge, check for distortion
of the cylinder head installation surface.
Standard value: 0.15 mm (0.006 inch) or less
Limit: 0.20 mm (0.008 inch)