Infiniti F50. Manual - part 288

COOLING FAN

CO-21

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ASSEMBLY

Assemble in the reverse order of disassembly.

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WATER PUMP

WATER PUMP

PFP:21020

Removal and Installation

EBS001KN

WARNING:

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

REMOVAL

1.

Drain engine coolant so that no engine coolant comes out from water pump fitting hole.

CAUTION:

Perform when the engine is cold.

2.

Remove below the parts.

●

Engine undercover

●

Air duct and engine room cover
For removing engine room cover, refer to 

EM-11, "Removal and Installation"

 .

●

Alternator, water pump and A/C compressor belt
For removing drive belt, refer to 

EM-13, "Removal and Installation"

 .

CAUTION:

Leave the fixed auto tensioner pulley in its fixed position when removing the drive belt.

3.

Disconnect the harness connector for the cooling fan speed control solenoid valve (joined with the water
pump).

4.

Remove the water pump pulley.

5.

Disconnect the cooling fan fluid hose.

●

Because there is no drain plug, drain the fluid from the hose separation point.

●

Prepare a receptacle with a volume of approximately 1  (2-1/8 US pt, 1-3/4 Imp pt).

6.

Remove the water pump.

●

Engine coolant will leak from the cylinder block, so have a receptacle ready below.

CAUTION:

●

Handle the water pump vane so that it does not contact any other parts.

SBIA0341E

1.

Water pump
(Do not disassemble.)

2.

O-ring

3.

Fluid hose (feed side)

4.

Fluid hose (return side)

5.

Water pump pulley

6.

Cooling fan pump
(Do not disassemble.)

7.

Cooling fan speed control solenoid 
valve (Do not disassemble.)

8.

Gasket

WATER PUMP

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●

Do not disassemble the water pump (including the cooling fan pump and cooling fan speed con-
trol solenoid valve).

INSPECTION AFTER REMOVAL

●

Visually check that there is no significant dirt or rusting on the
water pump body and vane.

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Check that there is no looseness in the vane shaft, and that it
turns smoothly when rotated by hand.

●

Visually check that there is no fluid leakage from the cooling fan
pump part and the cooling fan speed control solenoid valve part.

●

If there are any unusualness, replace the water pump assembly.

INSTALLATION

●

Install in the reverse order of removal.

●

Apply Genuine Nissan Power Steering Fluid II (the cooling fan fluid) or equivalent to the O-ring of the cool-
ing fan fluid hose (on the feed side). Then insert the O-ring to the water pump so that it does not come out
of the attachment groove.

●

For bleeding the air from the cooling system, refer to 

CO-10, "REFILLING ENGINE COOLANT"

 .

●

For bleeding the air from the cooling fan fluid, refer to 

CO-19, "INSTALLATION"

 .

INSPECTION AFTER INSTALLATION

●

After installing water pump, check for leaks for engine coolant using radiator cap tester. Refer to 

CO-9,

"LEAK CHECK"

 .

●

Start the engine. Visually check that there is no leaks of the engine coolant and cooling fan fluid.

PBIC0155E

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THERMOSTAT AND WATER CONTROL VALVE

THERMOSTAT AND WATER CONTROL VALVE

PFP:21200

Removal and Installation

EBS001I1

WARNING:

Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
fluid 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 air duct and engine room cover. For removing engine room cover, refer to 

EM-11, "Removal and

Installation"

 .

3.

Remove water suction hose from water inlet side.

4.

Remove water inlet and thermostat.

5.

Remove intake manifold upper and intake manifold lower.

6.

Remove water connector and water control valve.

SBIA0369E

1.

Water connector

2.

O-ring

3.

Rubber ring

4.

Heater hose

5.

Water control valve

6.

Rear water outlet

7.

Gasket

8.

O-ring

9.

Water outlet pipe

10.

Thermostat housing

11.

Radiator cap

12.

Radiator upper hose

13.

Thermostat

14.

Rubber ring

15.

Water inlet

16.

Water suction hose

17.

Water suction pipe

18.

Radiator lower hose

19.

Gasket

20.

O-ring

21.

Heater pipe

22.

Heater hose