Infiniti M45 (Y34). Manual - part 287

 

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Infiniti M45 (Y34). Manual - part 287

 

 

COOLING FAN

CO-21

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Immediately after starting, certain noise will come from the cooling fan 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 engine and disconnect the harness connector for cooling
fan speed control solenoid valve.

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

6.

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

7.

Stop engine. Connect the harness connector for 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 level gauge on 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 level gauge.

NOTE:

There is no specified timing for replacing the fluid.

Refer to 

EC-578, "DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE"

  for control of

cooling fan. 

Disassembly and Assembly

ABS004R9

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 balancer clip from 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.

ASSEMBLY

Assemble in the reverse order of disassembly.

PBIC0150E

COLD

: Fluid temperature 0 - 30 

°

C (32 - 86 

°

F)

HOT

: Fluid temperature 50 - 80 

°

C (122 - 176 

°

F)

PBIC2613E

PBIC0152E

PBIC0153E

CO-22

WATER PUMP

WATER PUMP

PFP:21020

Removal and Installation

ABS004RA

WARNING:

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

REMOVAL

1.

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

CO-9,

"ENGINE COOLANT"

 .

CAUTION:

Perform when engine is cold.

2.

Remove below the parts.

Engine undercover

Air duct and engine cover; Refer to 

EM-12, "Removal and Installation"

 .

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

EM-13, "Removal and Installation"

 .

CAUTION:

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

3.

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

4.

Remove water pump pulley.

5.

Disconnect 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 water pump.

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

CAUTION:

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

Do not disassemble water pump (including cooling fan pump and cooling fan speed control
solenoid valve).

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

PBIC2568E

WATER PUMP

CO-23

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INSPECTION AFTER REMOVAL

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

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

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

If there are any unusualness, replace water pump assembly.

INSTALLATION

Install in the reverse order of removal.

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

For bleeding the air from the cooling system, refer to 

CO-9, "REFILLING ENGINE COOLANT"

 .

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

CO-20, "INSTALLATION"

 .

INSPECTION AFTER INSTALLATION

Check for leaks of engine coolant using the radiator cap tester adapter [SST: EG17650301 (J33984-A)]
and the radiator cap tester (commercial service tool). Refer to 

CO-9, "CHECKING COOLING SYSTEM

FOR LEAKS"

 .

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

PBIC0155E

CO-24

THERMOSTAT AND WATER CONTROL VALVE

THERMOSTAT AND WATER CONTROL VALVE

PFP:21200

Removal and Installation

ABS004RB

WARNING:

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

REMOVAL

1.

Drain engine coolant from radiator. Refer to 

CO-9, "Changing Engine Coolant"

 .

CAUTION:

Perform when engine is cold.

2.

Remove air duct and engine cover. Refer to 

EM-16, "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. Refer to 

EM-18, "INTAKE MANIFOLD"

 .

6.

Remove thermostat housing, water outlet pipe, water control valve, rear water outlet and heater pipe
(between left and right banks).

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

PBIC1990E

 

 

 

 

 

 

 

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