Infiniti G35 (V35) Sedan. Manual - part 315

CO-8

< ON-VEHICLE MAINTENANCE >

ENGINE COOLANT

ON-VEHICLE MAINTENANCE

ENGINE COOLANT

Inspection

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LEVEL 

• 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.
• Check that the reservoir tank cap is tightened.

LEAKAGE

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

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

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 dam-
age.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

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

Draining

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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.

1.

Open radiator drain plug (2) 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-88, "Setting"

.

2.

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

A

:  MAX

B

:  MIN

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Testing pressure

: Refer to 

CO-26, "Radiator"

.

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1

: Engine under cover

A

: Radiator drain plug hole

: Vehicle front

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ENGINE COOLANT

CO-9

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3.

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

CO-10, "Flushing"

.

Refilling

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1.

Remove air cleaner case (LH). Refer to 

EM-25, "Exploded View"

.

2.

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-114,

"Exploded View"

.

3.

Make sure that each hose clamp has been firmly tightened.

4.

Remove air relief plug (2) on radiator left side. 

5.

Remove air relief plug (1) on heater hose.

6.

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-10, "Fluids and Lubricants"

.

Tightening torque

: Refer to 

CO-14, "Exploded View"

.

1

: Reservoir tank

3

: Engine cover

: Vehicle front

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2

: Heater hose

: Vehicle front

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Engine coolant capacity

: Refer to 

CO-26, 

"Periodical Maintenanc
e Specification"

.

(With reservoir tank at 
“MAX” level)

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Reservoir tank engine coolant capacity

:Refer to 

CO-26, 

"Periodical Maintenance Specification"

(At “MAX” level)

CO-10

< ON-VEHICLE MAINTENANCE >

ENGINE COOLANT

7.

When engine coolant overflows air relief hole on radiator, install
air relief plug with new O-ring.

8.

Repeat step 6.

9.

When engine coolant overflows air relief hole on heater hose, install air relief plug with new O-ring. Then
refill radiator with engine coolant.

10. Install air cleaner case (LH). Refer to 

EM-25, "Exploded View"

.

11. Install radiator cap.
12. Warm up engine 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.

13. 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.

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

15. Repeat steps 11 through 14 two or more times with radiator cap installed until engine coolant level no

longer drops. 

16. Check cooling system for leaks with engine running.

17. 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.

18. Repeat step 17 three times.
19. If sound is heard, bleed air from cooling system by repeating step 6, and steps from 11 to 18 until engine

coolant level no longer drops. 

20. Check that the reservoir tank cap is tightened.

Flushing

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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-88, "Set-

ting"

.

A

: MAX 

B

:  MIN

Tightening torque

: Refer to 

CO-14, "Exploded View"

.

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: 1.2 N·m (0.12 kg-m, 11 in-lb)

Tightening torque

: Refer to 

CO-14, "Exploded View"

.

ENGINE COOLANT

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2.

Remove air relief plug (1) on heater hose.

3.

Remove air relief plug (2) on radiator.

4.

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

5.

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

6.

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

7.

Stop the engine and wait until it cools down.

8.

Drain water from the system. Refer to 

CO-8, "Draining"

.

9.

Repeat steps 1 through 8 until clear water begins to drain from radiator.

10. Check that the reservoir tank cap is tightened.

2

: Heater hose

: Vehicle front

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1

: Reservoir tank

3

: Engine cover

: Vehicle front

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Tightening torque

: Refer to 

CO-14, "Exploded View"

.