Infiniti FX35 / FX45. Manual - part 270

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ENGINE COOLANT

ENGINE COOLANT

Inspection

INFOID:0000000001325845

LEVEL CHECK

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

to “MAX” when the engine is cool.

• Adjust the engine coolant level as necessary.

LEAK CHECK

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

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

WARNING:

Do not remove radiator cap when engine is hot. Serious burns
could occur from high-pressure engine coolant escaping from
radiator.

CAUTION:

Higher test pressure than specified may cause radiator damage.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

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

Changing Engine Coolant

INFOID:0000000001325846

WARNING:

• To avoid being scalded, do not change engine coolant when the engine is hot.
• Wrap a thick cloth around radiator cap and carefully remove radiator cap. First, turn radiator cap a

quarter of a turn to release built-up pressure. Then turn radiator cap all the way.

DRAINING ENGINE COOLANT

1.

Remove front engine undercover with power tool.

2.

Open radiator drain plug at the bottom of radiator, and then
remove radiator cap. 

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

EM-123, "Disassembly and Assembly"

.

SMA412B

Testing pressure

: 157 kPa (1.6 kg/cm

2

, 23 psi)

PBIC5121J

SBIA0444E

ENGINE COOLANT

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3.

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

4.

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

REFILLING ENGINE COOLANT

1.

Install reservoir tank if removed, and radiator drain plug.

CAUTION:

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

If water drain plugs on cylinder block are removed, close and tighten them. Refer to 

EM-123, "Dis-

assembly and Assembly"

.

2.

Make sure that each hose clamp has been firmly tightened.

3.

Remove air relief plug on heater hose.

4.

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

slowly of less than 2   (2-1/8 US qt, 1-3/4 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-9, "Fluids and Lubricants"

.

• When engine coolant overflows air relief hole on heater hose,

install air relief plug with new O-ring.

5.

Install radiator cap.

6.

Warm up until opening thermostat. Standard for warming-up time is approximately 10 minutes at 3,000
rpm.
• Make sure 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.

7.

Stop the engine and cool down to less than approximately 50

°

C (122

°

F).

Radiator drain plug:             

 : 1.18 N·m (0.12 kg-m, 10 in-lb)

SBIA0445E

Engine coolant capacity
(With reservoir tank at “MAX” level)

: Approximately 8.6   (9-1/8 US qt, 7-5/8 lmp qt)

SMA182B

Reservoir tank engine coolant capacity 
(At “MAX” level)

: 0.8   (7/8 US qt, 3/4 lmp qt)

Air relief plug:

 : 1.19 N·m (0.12 kg-m, 11 in-lb)

SMA412B

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ENGINE COOLANT

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

8.

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

9.

Repeat steps 4 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops. 

10. Check cooling system for leaks with engine running.

11. Warm up the engine, and check for sound of engine coolant flow while running engine from idle up to

3,000 rpm with heater temperature controller set at several position between “COOL” and “WARM”.
• Sound may be noticeable at heater unit.

12. Repeat step 11 three times.

13. If sound is heard, bleed air from cooling system by repeating step 4 through 7 until engine coolant level no

longer drops. 

FLUSHING COOLING SYSTEM

1.

Install reservoir tank if removed, and radiator drain plug.

If water drain plugs on cylinder block are removed, close and tighten them. Refer to 

EM-123, "Dis-

assembly and Assembly"

.

2.

Remove air relief plug on heater hose.

3.

Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap.

4.

Run the engine and warm it up to normal operating temperature.

5.

Rev the engine two or three times under no-load.

6.

Stop the engine and wait until it cools down.

7.

Drain water from the system. Refer to "DRAINING ENGINE COOLANT".

8.

Repeat steps 1 through 7 until clear water begins to drain from radiator.

Radiator drain plug:             

 : 1.18 N·m (0.12 kg-m, 10 in-lb)

SBIA0445E

Air relief plug:

 : 1.19 N·m (0.12 kg-m, 11 in-lb)

RADIATOR

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RADIATOR

Component

INFOID:0000000001325847

• Refer to 

GI-8, "Component"

 for symbols in the figure.

Removal and Installation

INFOID:0000000001325848

REMOVAL

WARNING:

Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine
coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to
release built-up pressure. Carefully remove radiator cap by turning it all the way.
1.

Remove front engine undercover with power tool.

2.

Drain engine coolant from radiator. Refer to 

CO-10, "Changing Engine Coolant"

.

CAUTION:

• Perform this step when the engine is cold.
• Do not spill engine coolant on drive belts.

3.

Remove air duct (inlet) and air cleaner case assembly. Refer to 

EM-17, "Component"

.

1.

Reservoir tank cap

2.

Reservoir tank

3.

Reservoir tank hose

4.

Clamp (reservoir tank hose)

5.

Clamp (radiator hose)

6.

Radiator hose (upper)

7.

Radiator upper mount bracket

8.

Mounting rubber (upper)

9.

Radiator cap

10. Radiator

11.

Mounting rubber (lower)

12. O-ring

13. Drain plug

14. Radiator hose (lower)

15. Clamp (A/T fluid cooler hose)

16. A/T fluid cooler hose

17. Radiator cooling fan assembly

18. Reservoir tank bracket

A.

To water outlet

B.

To A/T fluid cooler tube

C.

To water inlet

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