Infiniti EX35. Manual - part 708

INTAKE MANIFOLD COLLECTOR

EM-31

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• Tighten in numerical order as shown in the figure.

NOTE:
• The figure shows the electric throttle control actuator (bank 1)

viewed from the air duct side.

• Viewed from the air duct side, order of tightening mounting bolts

of electric throttle control actuator (bank 2) is the same as that of
the electric throttle control actuator (bank 1).

• Perform the “Throttle Valve Closed Position Learning” when har-

ness connector of electric throttle control actuator is disconnected.
Refer to 

EC-17, "THROTTLE VALVE CLOSED POSITION

LEARNING : Description"

.

• Perform the “Idle Air Volume Learning” and “Throttle Valve Closed

Position Learning” when electric throttle control actuator is replaced. Refer to 

EC-17, "IDLE AIR VOLUME

LEARNING : Description"

 and 

EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Description"

.

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EM-32

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INTAKE MANIFOLD

INTAKE MANIFOLD

Exploded View

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Removal and Installation

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REMOVAL

1.

Release fuel pressure. Refer to 

EC-538, "Inspection"

.

2.

Remove intake manifold collector. Refer to 

EM-29, "Exploded View"

.

3.

Remove fuel tube and fuel injector assembly. Refer to 

EM-37, "Exploded View"

.

4.

Remove harness bracket.

5.

Loosen mounting bolts and nuts in reverse order as shown in
the figure to remove intake manifold with power tool.

CAUTION:

• Cover engine openings to avoid entry of foreign materi-

als.

• Put a mark on the intake manifold and the cylinder head

with paint before removal because they need installed in
the specified direction. 

6.

Remove gaskets.

INSTALLATION

Note the following, and install in the reverse order of removal.

INTAKE MANIFOLD

• If stud bolts were removed, install them and tighten to the specified torque below.

1.

Harness bracket

2.

Intake manifold

3.

Gasket

A.

Refer to 

EM-32

Refer to 

GI-4, "Components"

 for symbols in the figure.

PBIC5453E

: Engine front

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: 10.8 N·m (1.1 kg-m, 8 ft-lb)

INTAKE MANIFOLD

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• Tighten all mounting bolts and nuts to the specified torque in two or

more steps in numerical order as shown in the figure.

CAUTION:

Install intake manifold with the marks (put on the intake mani-
fold and the cylinder head before removal) aligned.

Inspection

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INSPECTION AFTER REMOVAL

Surface Distortion

• Check the surface distortion of the intake manifold mating surface

with a straightedge (A) and a feeler gauge (B).

• If it exceeds the limit, replace intake manifold.

: Engine front

1st step:

: 7.4 N·m (0.75 kg-m, 5 ft-lb)

2nd step and after:

: 25.5 N·m (2.6 kg-m, 19 ft-lb)

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Limit

: Refer to 

EM-140, "Intake Manifold"

.

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EM-34

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EXHAUST MANIFOLD

EXHAUST MANIFOLD

Exploded View

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Removal and Installation

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REMOVAL

WARNING:

Perform the work when the exhaust and cooling system have completely cooled down.
NOTE:
When removing bank 1 side parts only, step 2, 5 and 7 are unnecessary.
1.

Remove engine undercover with power tool.

2.

Drain engine coolant. Refer to 

CO-7, "Draining"

.

3.

Remove engine cover with power tool. Refer to 

EM-25, "Exploded View"

.

4.

Remove air cleaner case and air duct (RH and LH). Refer to 

EM-27, "Exploded View"

.

5.

Remove heater pipe and water hose. Refer to 

CO-23, "Exploded View"

.

6.

Remove exhaust front tube and three way catalysts (bank 1 and bank 2). Refer to 

EX-5, "Exploded View"

.

7.

Disconnect steering lower joint at power steering gear assembly side, and release steering lower shaft.

1.

Heated oxygen sensor 2 (bank 1)

2.

Air fuel ratio sensor 1 (bank 1)

3.

Exhaust manifold cover (upper)

4.

Exhaust manifold (bank 1)

5.

Exhaust manifold cover (lower)

6.

Gasket

7.

Ring gasket

8.

Three way catalyst (bank 1)

9.

Gasket

10. Heated oxygen sensor 2 (bank 2)

11. Gasket

12.

Three way catalyst (bank 2)

13. Ring gasket

14. Exhaust manifold (bank 2)

15.

Exhaust manifold cover (lower)

16. Gasket

17. Air fuel ratio sensor 1 (bank 2)

18.

Exhaust manifold cover (upper)

Refer to 

GI-4, "Components"

 for symbols in the figure.

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