Infiniti M45 (Y34). Manual — part 287
COOLING FAN
CO-21
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CO
●
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.
●
EC-578, "DTC P1480 COOLING FAN SPEED CONTROL SOLENOID VALVE"
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
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
C
D
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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
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
●
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
.
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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