Mitsubishi 380. Manual - part 243

EXHAUST MANIFOLD

INTAKE AND EXHAUST

15-12

REMOVAL SERVICE POINTS

.

<<A>> LEFT BANK HEATED OXYGEN SENSOR 
(FRONT)/RIGHT BANK HEATED OXYGEN SEN-
SOR (FRONT)/RIGHT BANK HEATED OXYGEN 
SENSOR (REAR) REMOVAL

Use special tool MD998770 to remove the heated oxygen sen-
sor.

.

<<B>> LEFT BANK HEATED OXYGEN SENSOR 
(REAR) REMOVAL

Use special tool MB991953 to remove the heated oxygen sen-
sor.

INSTALLATION SERVICE POINTS

.

>>A<< RIGHT BANK HEATED OXYGEN SENSOR 
(REAR)/RIGHT BANK HEATED OXYGEN SENSOR 
(FRONT)/LEFT BANK HEATED OXYGEN SENSOR 
(FRONT) INSTALLATION

Use special tool MD998770 to install the heated oxygen sen-
sor.

.

ACX02426AB

MD998770

AC301966

AC

HEATED OXYGEN 
SENSOR

MB991953

ACX02426AB

MD998770

EXHAUST MANIFOLD

INTAKE AND EXHAUST

15-13

>>B<< LEFT BANK HEATED OXYGEN SENSOR 
(REAR) INSTALLATION

Use special tool MB991953 to install the heated oxygen sensor.

INSPECTION

M1151003400587

Check the following points; replace the part if a problem is 
found.

.

Exhaust Manifold Check

1. Check for damage or cracking of any part.

2. Using a straight edge and a 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)

AC301966

AC

HEATED OXYGEN 
SENSOR

MB991953

EXHAUST PIPE AND MAIN MUFFLER

INTAKE AND EXHAUST

15-14

EXHAUST PIPE AND MAIN MUFFLER

REMOVAL AND INSTALLATION

M1151008700334

Required Special Tool:

• MB991953: Oxygen Sensor Wrench

REMOVAL SERVICE POINT

.

<<A>> HEATED OXYGEN SENSOR REMOVAL

Use special tool MB991953 to remove the heated oxygen sen-
sor.

AC306969

1

2

3

3

4

5

6

7

8

10

11

12

13

17

18

N

N

N

N

49 ± 4 N·m

37 ± 3 ft-lb

22 ± 4 N·m

16 ± 3 ft-lb

49 ± 9 N·m

37 ± 6 ft-lb

49 ± 4 N·m

37 ± 3 ft-lb

45 ± 5 N·m

34 ± 3 ft-lb

12 ± 2 N·m

107 ± 17 in-lb

12 ± 2 N·m

107 ± 17 in-lb

AB

N

49 ± 9 N·m

37 ± 6 ft-lb

14

<3.8L ENGINE>

15

12 ± 2 N·m

107 ± 17 in-lb

19

MAIN MUFFLER REMOVAL STEPS

1.

MAIN MUFFLER

2.

SEAL RING

3.

HANGER

CENTER EXHAUST PIPE 
REMOVAL STEPS

4.

CROSSMEMBER STAY

5.

FRONT FLOOR BACKBONE BRACE

6.

CENTER EXHAUST PIPE

2.

SEAL RING

7.

GASKET

8.

HANGER

FRONT EXHAUST PIPE REMOVAL 
STEPS

10.

FRONT NO.1 EXHAUST PIPE

11.

GASKET

12.

GASKET 

13.

SEAL RING

14.

FRONT NO.2 EXHAUST PIPE

7.

GASKET

15.

HANGER

17.

CENTER UNDER FLOOR HEAT 
PROTECTOR

18.

FRONT UNDER FLOOR HEAT 
PROTECTOR

19.

REAR UNDER FLOOR HEAT 
PROTECTOR

AC301966

AC

HEATED OXYGEN 
SENSOR

MB991953

EXHAUST PIPE AND MAIN MUFFLER

INTAKE AND EXHAUST

15-15

INSTALLATION SERVICE POINT

.

>>A<< HEATED OXYGEN SENSOR INSTALLA-
TION

Use special tool MB991953 to install the heated oxygen sensor.

AC301966

AC

HEATED OXYGEN 
SENSOR

MB991953