Infiniti QX56 (Z62). Manual - part 647

EM-28

< REMOVAL AND INSTALLATION >

AIR CLEANER AND AIR DUCT

Note the following item, and install in the reverse order of removal.
• Align marks. Attach each joint. Screw clamps firmly.

Inspection

INFOID:0000000006289540

INSPECTION AFTER REMOVAL

Inspect air duct assembly for crack or tear.
• If damage is found, replace air duct assembly

Clamp tightening torque

: 4.5 N·m (0.46 kg-m, 40 in-lb)

IGNITION COIL

EM-29

< REMOVAL AND INSTALLATION >

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IGNITION COIL

Exploded View

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Removal and Installation

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REMOVAL

1.

Remove engine cover. Refer to 

EM-25, "Exploded View"

.

2.

Remove ignition coil.

CAUTION:

Never impact it.
NOTE:
Installation position of ignition coil depends on cylinder position.

INSTALLATION

1.

Install ignition coil.

CAUTION:

• Install Ignition coil marked with an identification mark (A)

on cylinder No. 5, 6, 7 and 8.

2.

Install engine cover. 

1.

Ignition coil (No. 2, 4)

2.

Ignition coil (No. 6, 8)

3.

Spark plug

4.

Rocker cover (bank 2)

5.

Rocker cover (bank 1)

6.

Ignition coil (No. 1, 3)

7.

Ignition coil (No. 5, 7)

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSBIA0388GB

: Engine front

JPBIA3471ZZ

EM-30

< REMOVAL AND INSTALLATION >

INTAKE MANIFOLD

INTAKE MANIFOLD

Exploded View

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Removal and Installation

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REMOVAL

WARNING:

To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.

1.

Remove engine cover and bracket. Refer to 

EM-25, "Exploded View"

.

2.

Remove air cleaner case (upper) and air duct. Refer to 

EM-27, "Exploded View"

.

3.

Disconnect manifold absolute pressure (MAP) sensor harness connector.

4.

Remove EVAP canister purge control solenoid valve.

5.

Disconnect PCV hoses from intake manifold.
• Add matching marks as necessary for easier installation.

6.

Drain engine coolant from radiator. Refer to 

CO-8, "Draining"

.

CAUTION:

• Perform this step when the engine is cold.

1.

Intake manifold

2.

PCV hose

3.

Clamp

4.

EVAP canister purge control sole-
noid valve

5.

Clamp

6.

EVAP hose

7.

Gasket

8.

Gasket

9.

Electric throttle control actuator

10.

PCV hose

11.

O-ring

12.

Manifold absolute pressure (MAP) 
sensor

A.

To rocker cover (bank 2)

B.

To centralized under-floor piping

C.

To rocker cover (bank 1)

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSBIA0402GB

INTAKE MANIFOLD

EM-31

< REMOVAL AND INSTALLATION >

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• Never spill engine coolant on drive belts.
NOTE:
When removing only intake manifold, move electric throttle control actuator without disconnecting the
water hoses.

7.

Remove electric throttle control actuator.
• Loosen mounting bolts in reverse order as shown in the figure.
NOTE:
The figure shows the electric throttle control actuator viewed
from the air duct side.

CAUTION:

• Handle carefully to avoid any impact to electric throttle

control actuator.

• Never disassemble.

8.

Remove intake manifold, using a power tool. 
• Loosen mounting bolts in reverse order as shown in the figure.

9.

Remove intake manifold gaskets.

CAUTION:

Cover engine openings to avoid entry of foreign materials.

10. Remove manifold absolute pressure (MAP) sensor, if necessary.

CAUTION:

Handle carefully to avoid any impact to manifold absolute pressure (MAP) sensor.

INSTALLATION

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

Intake Manifold

Tighten in numerical order as shown in the figure.

Electric Throttle Control Actuator

JPBIA2362ZZ

: Engine front

JPBIA3470ZZ

: Engine front

JPBIA3470ZZ