Infiniti G37 Coupe. Manual - part 890

ENGINE MAINTENANCE

MA-13

< ON-VEHICLE MAINTENANCE >

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

EM-72, "Setting"

.

2.

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

3.

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

INFOID:0000000001766054

1.

Remove air cleaner case (LH). Refer to 

EM-26, "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-110,

"Exploded View"

.

3.

Check 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.

1

: Engine under cover

A

: Radiator drain plug hole

: Vehicle front

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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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MA-14

< ON-VEHICLE MAINTENANCE >

ENGINE MAINTENANCE

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"

.

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-26, "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.
• 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.

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.

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)

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)

ENGINE MAINTENANCE

MA-15

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ENGINE COOLANT : 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-110,

"Exploded View"

.

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 

MA-12, "ENGINE COOLANT : Draining"

.

9.

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

10. Check that the reservoir tank cap is tightened.

FUEL LINES

Tightening torque

: Refer to 

CO-14, "Exploded View"

.

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"

.

MA-16

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ENGINE MAINTENANCE

FUEL LINES : Inspection

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Inspect fuel lines, fuel filler cap and fuel tank for improper attach-
ment, leaks, cracks, damage, loose connections, chafing or deterio-
ration.

If necessary, repair or replace damaged parts.

AIR CLEANER FILTER

AIR CLEANER FILTER : Removal and Installation

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REMOVAL

1.

Unhook clips (1).

2.

Remove air cleaner filter (1) from air cleaner case (2).

INSTALLATION

Note the following, and install in the reverse order of removal.
• Install the air cleaner filter by aligning the seal with the notch of air cleaner case.

ENGINE OIL

ENGINE OIL : Draining

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WARNING:

• Be careful not to get burn yourself, as engine oil may be hot.
• Prolonged and repeated contact with used engine oil may cause skin cancer. Try to avoid direct skin

contact with used engine oil. If skin contact is made, wash thoroughly with soap or hand cleaner as
soon as possible. 

1.

Warm up the engine, and check for engine oil leakage from engine components. Refer to 

LU-6, "Inspec-

tion"

.

2.

Stop the engine and wait for 10 minutes.

3.

Loosen oil filler cap.

A

: Engine

B

: Fuel line

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:  Fuel  tank

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: Air cleaner case

3

:  Holder

KBIA3584J

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:  Holder

4

:  Clip

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