Infiniti F50. Manual - part 285

ENGINE COOLANT

CO-9

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ENGINE COOLANT

PFP:KQ100

Inspection

EBS001KH

LEVEL CHECK

●

Check if the reservoir tank engine coolant level within MIN to
MAX When engine is cool.

●

Adjust engine coolant if too much or too little.

LEAK CHECK

To check for leakage, apply pressure to the cooling system with a
tester.

WARNING:

Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure engine coolant escaping
from the radiator.

CAUTION:

Higher pressure than specified may cause radiator damage.

Changing Engine Coolant

EBS00250

WARNING:

●

To avoid being scalded, never change the engine coolant when the engine is hot.

●

Wrap a thick cloth around cap and carefully remove the cap. First, turn the cap a quarter of a turn
to release built-up pressure. Then turn the cap all the way.

DRAINING ENGINE COOLANT

1.

Remove engine undercover with power tool.

2.

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

●

Be careful not to allow engine coolant to contact drive belts.

When draining all the engine coolant in the system, also perform the following steps.
3.

Remove air relief plug on heater hose.

SMA412B

Testing pressure

: 157 kPa (1.6 kg/cm

2

 , 23 psi)

PBIC0953E

PBIC0954E

CO-10

ENGINE COOLANT

4.

Drain engine coolant from both sides of cylinder block when
draining all the engine coolant in the system.

5.

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

CO-11, "FLUSHING COOLING SYSTEM"

 .

6.

Remove reservoir tank, drain engine coolant, then clean reservoir tank.

REFILLING ENGINE COOLANT

1.

Install reservoir tank if removed, and radiator drain plug.

2.

Install cylinder block drain plugs if removed.

●

Apply thread sealant to the thread of cylinder block drain plugs.
Use Genuine Thread Sealant or equivalent. Refer to 

GI-46, "RECOMMENDED CHEMICAL PROD-

UCTS AND SEALANTS"

 . 

3.

Fill radiator and reservoir tank to specified level.

●

Use genuine Nissan anti-freeze engine coolant or equiva-
lent mixed with water (distilled or demineralized). Refer to

MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS"

 .

PBIC0145E

PBIC0146E

Radiator drain plug:

 : 0.78 - 1.56 N·m (0.08 - 0.16 kg-m, 7 - 14 in-lb)

Cylinder block drain plug:

 : 14.7 - 24.5 N·m (1.5 - 2.5 kg-m , 11 - 18 ft-lb)

Engine coolant capacity (With reservoir tank):

  Approximately 9.8  (10-3/8 US qt, 8-5/8 Imp qt)

SMA182B

ENGINE COOLANT

CO-11

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●

Pour engine coolant through engine coolant filler neck
slowly of less than 2  (2-1/8 US qt, 1-3/4 Imp qt) a minute
to allow air in system to escape.

●

When engine coolant overflows air relief hole on heater hose,
install air relief plug.

4.

Warm up engine to normal operating temperature with radiator
cap installed.

5.

Run engine at 3,000 rpm for 10 seconds and return to idle
speed.

●

Repeat two or three times.
Watch engine coolant temperature gauge so as not to overheat the engine.

6.

Stop engine and cool down to less than approximately 50

°

C (122

°

F).

●

Cool down using a fan to reduce the time.

●

If necessary, refill radiator up to filler neck with engine coolant.

7.

Refill reservoir tank to MAX level line with engine coolant.

8.

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

9.

Check cooling system for leaks with engine running.

10. Warm up 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.

11. Repeat step 8 three times.

12. If sound is heard, bleed air from cooling system by repeating steps 4 through 7 until engine coolant level

no longer drops.   

●

Clean excess engine coolant from engine.

FLUSHING COOLING SYSTEM

1.

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. 

2.

Run engine and warm it up to normal operating temperature.

3.

Rev engine two or three times under no-load.

4.

Stop engine and wait until it cools down.

5.

Drain water.

6.

Repeat steps 1 through 5 until clear water begins to drain from radiator.

Reservoir tank capacity:

  0.8  (7/8 US qt, 3/4 lmp qt)

SMA412B

CO-12

RADIATOR

RADIATOR

PFP:21400

Removal and Installation

EBS001KJ

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.

REMOVAL

1.

Drain engine coolant from the radiator. Refer to 

CO-9, "Changing Engine Coolant"

 .

CAUTION:

Perform when the engine is cold.

2.

Remove cooling fan shroud. Refer to 

CO-18, "Removal and Installation"

 .

3.

Remove A/T oil cooler hoses. 

●

Install blind plug to avoid leakage of A/T fluid.

4.

Remove bolts of both right/left end of radiator core (2 bolts for each).

SBIA0368E

1.

Radiator

2.

Bracket

3.

Mounting rubber

4.

Clip

5.

Mounting rubber

6.

O-ring

7.

Engine coolant temperature sensor

8.

Radiator hose (lower)

9.

Reservoir tank hose

10. Reservoir tank

11.

Bracket

12.

Cap

13. A/T oil cooler hose

14.

Drain plug

15.

Cooling fan shroud

16. O-ring

17.

Radiator hose (upper)

18.

Bracket