Infiniti M35/M45 Y50. Manual — part 353
WATER PUMP
CO-53
[VK45DE]
C
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WATER PUMP
PFP:21020
Components
NBS004RP
●
Refer to
Removal and Installation
NBS004RQ
CAUTION:
●
When removing water pump, be careful not to get engine coolant on drive belts.
●
Water pump can not be disassembled and should be replaced as a unit.
●
After installing water pump, connect hose and clamp securely, then check for leaks using radiator
cap tester (commercial service tool) and radiator cap tester adapter (commercial service tool).
REMOVAL
1.
Remove following parts:
●
Front engine undercover (power tool)
●
Engine cover: Refer to
●
Engine room cover (RH and LH): Refer to
●
Air duct (inlet): Refer to
EM-177, "AIR CLEANER AND AIR DUCT"
●
Alternator, water pump and A/C compressor belt: Refer to
2.
Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to
CAUTION:
●
Perform this step when engine is cold.
●
Do not spill engine coolant on drive belts.
3.
Remove water pump pulley.
4.
Remove water pump.
●
Engine coolant will leak from cylinder block, so have a receptacle ready under vehicle.
CAUTION:
●
Handle the water pump vane so that it does not contact any other parts.
●
Do not disassemble water pump.
1.
Water pump
2.
Water pump pulley
3.
Gasket
PBIC3396E
CO-54
[VK45DE]
WATER PUMP
INSPECTION AFTER REMOVAL
●
Visually check that there is no significant dirt or rusting on water
pump body and vane.
●
Make sure there is no looseness in vane shaft, and that it turns
smoothly when rotated by hand.
●
If anything is found, replace water pump.
INSTALLATION
Installation is the reverse order of removal.
INSPECTION AFTER INSTALLATION
●
Check for leaks of engine coolant using radiator cap tester adapter (commercial service tool) and radiator
cap tester (commercial service tool). Refer to
●
Start and warm up engine. Visually check if there is no leaks of engine coolant.
PBIC1539E
THERMOSTAT AND WATER CONTROL VALVE
CO-55
[VK45DE]
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THERMOSTAT AND WATER CONTROL VALVE
PFP:21200
Components
NBS004RR
●
Refer to
Removal and Installation
NBS004RS
REMOVAL
1.
Remove engine room cover (RH and LH). Refer to
2.
Remove engine cover with power tool. Refer to
3.
Remove air duct (inlet). Refer to
EM-177, "AIR CLEANER AND AIR DUCT"
4.
Drain engine coolant from drain plugs on radiator and both side of cylinder block. Refer to
CAUTION:
●
Perform this step when engine is cold.
●
Do not spill engine coolant on drive belts.
1.
Water connector
2.
O-ring
3.
Rubber ring
4.
Heater hose
5.
Water control valve
6.
Water outlet
7.
Gasket
8.
O-ring
9.
Water outlet pipe
10.
Thermostat housing
11.
Radiator cap
12.
Radiator hose (upper)
13.
Thermostat
14.
Rubber ring
15.
Water inlet
16.
Water suction hose
17.
Water suction pipe
18.
Radiator hose (lower)
19.
Gasket
20.
O-ring
21.
Heater pipe
22.
Heater hose
A.
To radiator
B.
To intake manifold adapter
C.
To cylinder block
D.
To cylinder head (right bank)
E.
To cylinder head (left bank)
F.
To heater core
PBIC3306E
CO-56
[VK45DE]
THERMOSTAT AND WATER CONTROL VALVE
5.
Disconnect water suction hose from water inlet.
6.
Remove water inlet and thermostat.
CAUTION:
Do not disassemble thermostat.
7.
Remove intake manifolds (upper and lower). Refer to
8.
Disconnect radiator hose (upper) from thermostat housing.
9.
Disconnect heater hoses from water outlet and heater pipe.
10. Remove thermostat housing, water outlet pipe, water connector, water control valve, water outlet and
heater pipe.
CAUTION:
Do not disassemble water control valve.
INSPECTION AFTER REMOVAL
●
Make sure that valves both in thermostat and water control valve are completely closing at normal tempar-
ature.
●
Place a thread so that it is caught in the valves of the thermostat
and water control valve. Immerse fully in a container filled with
water. Heat while stirring. (The example in the figure shows ther-
mostat.)
●
The valve opening temperature is the temperature at which the
valve opens and falls from the thread.
●
Continue heating. Check the maximum valve lift.
NOTE:
The maximum valve lift standard temperature for water control
valve is the reference value.
●
After checking the maximum valve lift, lower the water tempera-
ture and check the valve closing temperature.
Standard values:
●
If the malfunctioning condition, when closing valve at normal temperature, or measured values are out of
the standard, replace thermostat and/or water control valve.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.
Thermostat and Water Control Valve
●
Install thermostat and water control valve with the whole circum-
ference of each flange part fit securely inside rubber ring. (The
example in the figure shows thermostat.)
SLC252B
Thermostat
Water control valve
Valve opening temperature
80 - 84
°
C (176 - 183
°
F)
93.5 - 96.5
°
C (200 - 206
°
F)
Maximum valve lift
More than 10 mm/95
°
C
(0.39 in/203
°
F)
More than 8 mm/108
°
C
(0.315 in/226
°
F)
Valve closing temperature
77
°
C (171
°
F)
90
°
C (194
°
F)
PBIC0157E
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