Infiniti QX56 (Z62). Manual - part 645

EM-20

< PERIODIC MAINTENANCE >

DRIVE BELTS

PERIODIC MAINTENANCE

DRIVE BELTS

Exploded View

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Checking

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WARNING:

Be sure to perform the these steps when engine is stopped.
• Check that the indicator (C) (notch on fixed side) of each auto-tensioner is within the possible use range (A).

NOTE:
• Check the each auto-tensioners indication when the engine is cold.
• When new drive belts is installed, the indicator (notch on fixed side) should be within the range (B) in the

figure.

• Visually check all drive belts for wear, damage or cracks.
• If the indicator (notch on fixed side) is out of the possible use range or drive belts are damaged, replace drive

belts.

Tension Adjustment

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Refer to 

EM-132, "Drive Belts"

.

Removal and Installation

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REMOVAL

1.

Move reservoir tank to the position without the hindrance for work. Refer to 

CO-13, "Exploded View"

.

1.

Drive belt

2.

Power steering oil pump pulley

3.

Alternator pulley

4.

Crankshaft pulley

5.

A/C compressor

6.

Idler pulley

7.

Cooling fan pulley

8.

Water pump pulley

9.

Drive belt auto-tensioner

A.

Possible use range

B.

Range when new drive belt is in-
stalled

C.

Indicator

D.

View D

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DRIVE BELTS

EM-21

< PERIODIC MAINTENANCE >

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2.

Install wrench (A) on drive belt auto tensioner pulley bolt, move
in the direction of arrow (loosening direction of tensioner) as
shown.

CAUTION:

• Never place hand in a location where pinching may occur

if the holding tool accidentally comes off.

• Never loosen the hexagonal part in center of auto ten-

sioner pulley (1) (Never turn it clockwise). If turned clock-
wise, the complete auto tensioner must be replaced as a
unit, including the pulley.

3.

Under the above condition, insert a metallic bar (B) of approxi-
mately 6 mm (0.24 in) in diameter (hexagonal bar wrench shown
as example in the figure) through the holding boss to lock auto tensioner pulley arm.

4.

Remove drive belt.

INSTALLATION

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

CAUTION:

• Check drive belts are securely installed around all pulleys.
• Check drive belts are correctly engaged with the pulley groove.
• Check for engine oil and engine coolant are not adhered drive belts and pulley groove.

Inspection

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INSPECTION AFTER INSTALLATION

• Turn crankshaft pulley clockwise several times to equalize tension between each pulley, and then confirm

tension of drive belts at indicator (notch on fixed side) is within the possible use range. Refer to 

EM-20,

"Exploded View"

.

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EM-22

< PERIODIC MAINTENANCE >

AIR CLEANER FILTER

AIR CLEANER FILTER

Exploded View

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Removal and Installation

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REMOVAL

NOTE:
• The viscous paper type filter does not need cleaning between replacement intervals.
• Replace the air filter as necessary for periodic maintenance. Refer to 

MA-6, "Introduction of Periodic Mainte-

nance"

.

1.

Unhook clips, and lift air cleaner case (upper).

2.

Remove air cleaner filter from air cleaner case.

INSTALLATION

Install is the reverse order of removal.

1.

Resonator

2.

Adapter

3.

Air cleaner case (lower)

4.

Air cleaner filter

5.

Air cleaner case (upper)

6.

Mass air flow sensor

7.

Air duct

8.

Clamp

Vehicle front

Refer to 

GI-4, "Components"

 for symbols in the figure.

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SPARK PLUG

EM-23

< PERIODIC MAINTENANCE >

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SPARK PLUG

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. Refer to 

EM-29, "Exploded View"

.

3.

Remove spark plug with a spark plug wrench (commercial ser-
vice tool).

INSTALLATION

Note the following item, installa is the reverse order of removal.

CAUTION:

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.

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a

: 14 mm (0.55 in)

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