Mitsubishi Lancer Evolution X. Manual - part 91

EXHAUST MANIFOLD AND TURBOCHARGER

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INTAKE AND EXHAUST

15-23

>>B<< TURBOCHARGER OIL RETURN TUBE 
GASKET INSTALLATION

Install the gasket as its protrusion is in the direction shown. 
Install the gasket so that its protrusion faces in the direction 
shown in the illustration.

.

>>C<< TURBOCHARGER 
BRACKET/TURBOCHARGER BRACKET AND 
TURBOCHARGER ASSEMBLY COUPLING BOLT 
INSTALLATION

1. Check that the turbocharger bracket is in close contact with 

the turbocharger assembly and with the cylinder block, and 
then temporarily tighten the turbocharger bracket.

2. Tighten the bolt of the cylinder block side to the specified 

torque.

Tightening torque: 51 ± 7 N⋅ m (38 ± 5 ft-lb)

3. Tighten the turbocharger bracket and the turbocharger 

assembly coupling bolt to the specified torque.

Tightening torque: 64 ± 5 N⋅ m (48 ± 3 ft-lb)

.

>>D<< EXHAUST MANIFOLD AND 
TURBOCHARGER ASSEMBLY COUPLING BOLT 
AND NUT INSTALLATION

1. Tighten the bolts and nuts according to the procedure below.

(1) Install two washers with their identification holes facing 

outside as shown in the figure.

(2) Tighten the bolts and nuts to 29 ± 2 N⋅ m (22 ± 1 ft-lb) in 

the order of number shown in the figure.

AC706181

AC

Protrusion

AC708637AC

Turbocharger assembly

Turbocharger bracket

Cylinder block

AC706227

Identification
hole

AB

Identification hole

Turbocharger assembly side

Nut, bolt side

EXHAUST MANIFOLD AND TURBOCHARGER

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INTAKE AND EXHAUST

15-24

(3) Use special tool MB991614 to tighten bolts and nuts 65 ± 

5 degrees angle.

.

>>E<< TURBOCHARGER EXHAUST OUTLET 
FITTING BRACKET INSTALLATION

1. Check that the turbocharger exhaust outlet fitting bracket is 

in close contact with the turbocharger exhaust outlet fitting 
and with the cylinder block, and then temporarily tighten the 
turbocharger exhaust outlet fitting bracket.

2. Tighten the bolt of the cylinder block side to the specified 

torque.

Tightening torque: 51 ± 7 N⋅ m (38 ± 5 ft-lb)

3. Tighten the bolt of the turbocharger exhaust outlet fitting 

bracket side to the specified torque.

Tightening torque: 64 ± 5 N⋅ m (48 ± 3 ft-lb)

.

>>F<< TURBOCHARGER COMPRESSOR 
BRACKET INSTALLATION 

1. Check that the turbocharger compressor bracket is in close 

contact with the turbocharger assembly and with the cylinder 
block, and then temporarily tighten the turbocharger 
compressor bracket.

2. Use special tool MB992274 to tighten the turbocharger 

compressor bracket mounting bolt (cylinder block side) to 
the specified torque.

Tightening torque: 51 ± 7 N⋅ m (38 ± 5 ft-lb)

3. Tighten the bolt of the turbocharger assembly side to the 

specified torque.

Tightening torque: 51 ± 7 N⋅ m (38 ± 5 ft-lb)

AC711125

65˚ ± 5˚

AC

MB991614

AC708638AC

Cylinder block

Turbocharger exhaust 
outlet fitting bracket

Turbocharger 
exhaust outlet fitting

AC708639AC

Turbocharger compressor bracket

Cylinder block

AC710947AC

MB992274

Turbocharger
compressor
bracket

Turbocharger
air inlet fitting

EXHAUST MANIFOLD AND TURBOCHARGER

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INTAKE AND EXHAUST

15-25

INSPECTION

M1151009400217

.

EXHAUST MANIFOLD CHECK

1. Check the exhaust manifold for damage and cracks, and 

replace it if necessary.

2. Using a straight edge and a thickness gauge, check for 

distortion of the cylinder head and turbocharger installation 
surface. If it exceeds the limit value, replace it.

Limit <Cylinder head assembly side>: 0.70 mm 

(0.028 inch)

Limit <Turbocharger assembly side>: 0.40 mm (0.016 

inch)

.

TURBOCHARGER ASSEMBLY CHECK

1. Visually check the turbine wheel and the compressor wheel 

for cracking or other damage.

2. Check whether the turbine wheel and the compressor wheel 

can be easily turned by hand.

3. Check for oil leakage from the turbocharger assembly.
4. Check whether or not the turbocharger waste gate 

regulating valve remains open. If any problem is found, 
replace the part after disassembly.

EXHAUST PIPE AND MAIN MUFFLER

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INTAKE AND EXHAUST

15-26

EXHAUST PIPE AND MAIN MUFFLER

REMOVAL AND INSTALLATION

M1151008701854

AC708975

41 ± 10 N·m
30 ± 7 ft-lb

1

2

3

44 ± 5 N·m
33 ± 3 ft-lb

5

6

8

44 ± 5 N·m
33 ± 3 ft-lb

9

10

N

11

12

12

13

14

N

15

16

N

17

18

19

N

4

7

20

N

5.0 ± 2.0 N·m
45 ± 17 in-lb 

20

N

20

N

5.0 ± 2.0 N·m
45 ± 17 in-lb 

21

23

N

23

N

24

25

22

7.0 ± 3.0 N·m
62 ± 26 in-lb 

9.5 ± 3.5 N·m
85 ± 30 in-lb 

5.0 ± 2.0 N·m
45 ± 17 in-lb 

41 ± 10 N·m
30 ± 7 ft-lb

59 ± 10 N·m
44 ± 7 ft-lb

75 ± 19 N·m
56 ± 14 ft-lb

9.5 ± 3.5 N·m
85 ± 30 in-lb 

5.0 ± 2.0 N·m
45 ± 17 in-lb 

AB

Exhaust main muffler and rear 
floor panel heat protector 
removal steps 

1.

Exhaust main muffler

10. Seal ring
11. Exhaust muffler hanger
12. Exhaust tail pipe diffuser
13. Rear floor panel heat protector 

Center exhaust pipe removal 
steps 

2.

Center exhaust pipe

10. Seal ring
14. Exhaust pipe gasket
15. Exhaust muffler hanger

Catalytic converter removal 
steps 

3.

Harness cover

4.

Heated oxygen sensor (rear) 
connector

<<

A

>>

>>

B

<<

5.

Heated oxygen sensor (rear) 

6.

Catalytic converter

14. Exhaust pipe gasket
16. Exhaust pipe gasket
17. Exhaust muffler hanger
18. Exhaust muffler hanger protector

Front exhaust pipe removal 
steps 

•

Cowl side trim (Refer to GROUP 
52A, Trims 

P.52A-12

).

•

Footrest

•

Floor console side cover (Refer to 
GROUP 52A, Front Floor 
Console Assembly 

P.52A-10

).

•

Turn up the passenger side floor 
carpet.

•

Front floor backbone brace (Refer 
to GROUP 42A, Loose Panel 

P.42A-198

).

7.

Heated oxygen sensor (front) 
connector

<<

A

>>

>>

B

<<

8.

Heated oxygen sensor (front)

9.

Front exhaust pipe

16. Exhaust pipe gasket
19. Seal ring

Front floor panel front heat 
protector and front floor panel 
rear heat protector removal 
steps 

2.

Center exhaust pipe

3.

Harness cover