Infiniti F50. Manual - part 287

RADIATOR (ALUMINUM TYPE)

CO-17

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●

Use pliers in the locations where radiator plate pliers A [SST:
KV99103510 (–)] cannot be used.

5.

Make sure that the rim is completely crimped down.

6.

Confirm that there is no leakage.
Refer to 

CO-17, "INSPECTION"

 .

INSPECTION

1.

Apply pressure with SST.

WARNING:

To prevent the risk of the hose coming undone while under
pressure, securely fasten it down with a hose clamp.
Attach a hose to the oil cooler to seal its inlet and outlet.

2.

Check for leakage by soaking radiator in water container.

SLC897

Standard height “H”

: 8.0 - 8.4 mm (0.315 - 0.331 in)

SLC554A

Specified pressure value

: 157 kPa (1.6 kg/cm

2

 , 23 psi)

SLC933-A

SLC934

CO-18

COOLING FAN

COOLING FAN

PFP:21140

Removal and Installation

EBS002O4

REMOVAL

1.

Remove air duct and air cleaner case. Refer to 

EM-15, "Removal and Installation"

 .

2.

Remove engine undercover with power tool.

3.

Drain engine coolant from the radiator. Refer to 

CO-9, "Changing Engine Coolant"

 .

SBIA0387E

1.

Cooling fan pump (with water pump)
(Do not disassemble.)

2.

O-ring

3.

Fluid hose

4.

Fluid hose

5.

Cooling fan motor
(Do not disassemble.)

6.

Cooling fan shroud

7.

Fan

8.

Cooling fan fluid cooler

9.

Clip

10.

Fluid hose

11.

Fluid hose

12.

Reservoir tank

COOLING FAN

CO-19

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CAUTION:

●

Perform when the engine is cold.

●

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

4.

Remove battery.

5.

Remove the vacuum tank from the front of the engine.

6.

Disconnect the radiator hoses (upper/lower).

7.

Remove the following parts from the fan shroud: coolant temperature sensor harness, coolant reservoir
tank hose, A/T oil cooler hose, mounting bolts for the cooling fan fluid hose bracket.

8.

Drain the cooling fan fluid. 

●

Because there is no drain plug on the reservoir tank or piping, drain the fluid from the reservoir tank oil
inlet and pipe division points.

●

Prepare a container with a volume of approximately 1  (2-1/8 US pt, 1-3/4 Imp pt) to drain the fluid into.

9.

Remove the cooling fan fluid reservoir tank.

10. Disconnect the hoses between the cooling fan motor and cooling fan pump (joined with the water pump),

and the hose between the cooling fan motor and the oil cooler. 

●

Fluid will leak, so have shop cloths ready.

11. Remove the cooling fan shroud mounting bolts. 

12. Remove the radiator mounting bracket. With the radiator moved toward the vehicle front, lift up and

remove the cooling fan.

CAUTION:

●

Be careful not to scratch or damage the radiator core.

●

When removing the cooling fan pump, remove it together with the water pump. (They can not be
separated.) Refer to 

CO-22, "Removal and Installation"

 .

●

When removing the cooling fan fluid cooler, be careful not to scratch or damage the air condi-
tioner condenser core.

INSPECTION AFTER REMOVAL

●

Turning oil cooling fan motor shaft by hands check if it rotates smoothly without looseness.

●

Check visually for fluid leakage from cooling fan motor.

●

For oil pump inspection, refer to 

CO-22, "WATER PUMP"

 .

INSTALLATION

Install in the reverse order of removal referring the following.

●

For bleeding the air from the cooling system, refer to 

CO-10, "REFILLING ENGINE COOLANT"

 .

Attaching the fluid pipe fixing clip
If the fluid pipe fixing clip has been removed from the installation holes, it must be replaced with a new clip.
Adding cooling fan fluid and bleeding air
The procedure below is for adding cooling fan fluid and bleeding air from the piping.

CAUTION:

●

Do not reuse the used fluid which was drained out.

●

Use genuine Nissan Power Steering Fluid or equivalent. Refer to 

MA-11, "RECOMMENDED FLUIDS

AND LUBRICANTS"

 . 

NOTE:
The total fluid volume is 777 ml (26.3 US floz, 27.4 Imp floz) (with the cold maximum on the level gauge when
the engine is cold).

1.

Add fluid to the reservoir tank until the fluid reaches the upper limit of the “HOT” level on the level gauge.
For the fluid level, refer to 

CO-20, "INSPECTION AFTER INSTALLATION"

 .

2.

Start the engine.

3.

Run the engine at idle speed for a few minutes. Then check the fluid level. If the level has decreased, add
fluid. 

CAUTION:

●

Be careful not to touch the fan while it is rotating.

●

Be sure to add fluid as necessary. If the fluid runs out in the reservoir tank, air will be taken in.

CO-20

COOLING FAN

NOTE:

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With the engine operating, the reservoir tank cap can be removed to check the fluid level.

●

Immediately after starting, certain noise will come from the fluid pump. This is caused by air taken in to
the piping and will gradually disappear.

4.

Continue with step 3 until the level of the fluid stops decreasing.

5.

Stop the engine and disconnect the harness connector for the
cooling fan speed control solenoid valve.

NOTE:
When the solenoid valve harness is disconnected, the fan will
operate at full speed.

6.

Start the engine. Repeat step 3 until the fluid level stops
decreasing and air bubbles stop coming out.

7.

Stop the engine. Connect the harness connector for the cooling
fan speed control solenoid valve.

INSPECTION AFTER INSTALLATION

●

Check that there is no fluid leakage from any hose connection or
any other part.

●

Check the fluid level with the level gauge on the reservoir tank
cap. If there is too much or too little, adjust the amount of fluid.

●

Check that under the fluid temperature conditions below, the
fluid level is within the “COLD” or “HOT” range on the level
gauge.

NOTE:

●

There is no specified timing for replacing the fluid.

●

Refer to 

EC-571, "DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE"

  for control of

cooling fan. 

Disassembly and Assembly

EBS0037K

DISASSEMBLY

1.

Remove fan.

CAUTION:

●

Reverse screws are used for the fan attachment nuts.
When removing or attaching, turn the nut the opposite
way as for a normal screw.

●

Do not remove the balancer clip from the fan.

●

For the case if the balancer clip is removed, make an
alignment mark for the installation position on the fan
side.

2.

Remove cooling fan motor from cooling fan shroud.

PBIC0150E

COLD

: Fluid temperature 0 - 30 

°

C (32 - 86 

°

F)

HOT

: Fluid temperature 50 - 80 

°

C (122 - 176 

°

F)

PBIC0151E

PBIC0152E

PBIC0153E