Infiniti QX56 (Z62). Manual - part 921

RECOMMENDED FLUIDS AND LUBRICANTS

MA-11

< PERIODIC MAINTENANCE >

Anti-Freeze Coolant Mixture Ratio

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The engine cooling system is filled at the factory with a high-quality, year-round, anti-freeze coolant solution.
The anti-freeze solution contains rust and corrosion inhibitors. Therefore, additional cooling system additives
are not necessary.

CAUTION:

When adding or replacing coolant, be sure to use only Genuine NISSAN Long Life Antifreeze/Coolant
(blue) or equivalent with the proper mixture ratio of 50% anti-freeze and 50% demineralized or distilled
water.
Mixing any other type of coolant or the use of non-distilled water will reduce the life expectancy of the
factory-fill coolant.

API certification mark

API service symbol

SAIA1514E

For outside temperatures down to:

Genuine NISSAN Anti-freeze

Coolant or equivalent

Demineralized water or dis-

tilled water

-35

-30

50%

MA-12

< PERIODIC MAINTENANCE >

ENGINE MAINTENANCE

ENGINE MAINTENANCE

DRIVE BELTS

DRIVE BELTS : Exploded View

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DRIVE BELTS : 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.

DRIVE BELTS : Tension Adjustment

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Refer to

EM-132, "Drive Belts"

ENGINE COOLANT

ENGINE COOLANT : Inspection

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LEVEL

Drive belt

Power steering oil pump pulley

Alternator pulley

Crankshaft pulley

A/C compressor

Idler pulley

Cooling fan pulley

Water pump pulley

Drive belt auto-tensioner

Possible use range

Range when new drive belt is in-
stalled

Indicator

View D

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ENGINE MAINTENANCE

MA-13

< PERIODIC MAINTENANCE >

• Check if the reservoir tank engine coolant level is within the “MIN”

to “MAX” when the engine is cool.

• Adjust the engine coolant level if necessary.

WARNING:

Never remove reservoir tank cap when engine is hot.

LEAKAGE

• To check for leakage, apply pressure to the cooling system with the

radiator cap tester and radiator cap tester adapter (commercial
service tool) (A).

WARNING:

Never remove radiator cap and reservoir tank cap when
engine is hot. Serious burns could occur from high-pressure
engine coolant escaping from water inlet.

CAUTION:

Higher test pressure than specified may cause radiator dam-
age.
NOTE:
In a case that engine coolant decreases, fill radiator with engine coolant.

• If anything is found, repair or replace damaged parts.

ENGINE COOLANT : Draining

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WARNING:

• Never remove radiator cap and reservoir tank cap when engine is hot. Serious burns could occur

from high-pressure engine coolant escaping from radiator.

• Wrap a thick cloth around the caps. Slowly turn them a quarter of a turn to release built-up pressure.

Carefully remove the caps by turning it all the way.

Open radiator drain plug (1) at the bottom of radiator, and then
remove radiator cap and reservoir tank cap.

When draining all of engine coolant in the system, open water drain plug on cylinder block. Refer
to

EM-103, "Setting"

Remove reservoir tank if necessary, and drain engine coolant and clean reservoir tank before installing.

Check drained engine coolant for contaminants such as rust, corrosion or discoloration.
If contaminated, flush the engine cooling system. Refer to

MA-15, "ENGINE COOLANT : Flushing"

ENGINE COOLANT : Refilling

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Install reservoir tank if removed, and radiator drain plug.

CAUTION:

Be sure to clean drain plug and install with new O-ring. Refer to

CO-13, "Exploded View"

: MAX

: MIN

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Testing pressure

: Refer to

CO-23, "Radiator"

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: Front under cover

: Vehicle front

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MA-14

< PERIODIC MAINTENANCE >

ENGINE MAINTENANCE

If water drain plug on cylinder block is removed, close and tighten it. Refer to

EM-107, "Disassem-

bly and Assembly"

Check that each hose clamp is firmly tightened.

Remove air relief plug (1) on heater hose.

Fill radiator, and reservoir tank, to specified level.
• Pour engine coolant through engine coolant filler neck

slowly of less than 3 (2-5/8 lmp qt) a minute to allow air
in system to escape.

• Use Genuine NISSAN Long Life Antifreeze/Coolant or

equivalent mixed with water (distilled or demineralized).
Refer to

MA-10, "Fluids and Lubricants"

When engine coolant overflows air relief hole on heater hose, install air relief plug with clamp. Then refill
radiator with engine coolant.

Install radiator cap.

Install reservoir tank cap.

Warm up engine until opening thermostat less than 3,000 rpm.
• Check thermostat opening condition by touching radiator hose (lower) to see a flow of warm water.

CAUTION:

Watch water temperature gauge so as not to overheat engine.

Stop the engine and cool down to less than approximately 50

C (122

F).

• Cool down using fan to reduce the time.
• If necessary, refill radiator up to filler neck with engine coolant.

10. Refill reservoir tank to “MAX” level line with engine coolant if necessary.

11. Repeat steps 6 through 10 two or more times with reservoir tank cap installed until engine coolant level no

longer drops.

: 1.96 N·m (0.2 kg-m, 17 in-lb)

Engine cover

: Vehicle front